The closing of the left av valve occurs near the beginning of isovolumetric relaxation
Heart valve are present to prevent the back flow of blood in the heart. There are four valves present in the heart they are aortic valve, pulmonary valve, tricuspid valve and atrioventricular valve.
Isovolumetric relaxation occurs when the aortic valve closes and mitral valve opens. It produces the second component of the heart beat.
Ventricular systole lasts for 0.3 seconds when both ventricles contract, and blood is forced into the lungs via pulmonary trucks.
Atrial diastole lasts about 0.7 second in which relaxation of the atria occurs and it is filled with blood.
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Resistant bacterial strains are more likely to be found in hospitals than in normal community settings. select the answer that provides the most likely explanation for why.
Answer: Organisms resistant to antimicrobial agents can be spread from patient to patient in health care facilities, often via the contaminated hands of health care personnel, contaminated medical or surgical equipment, or the inanimate hospital environment.
Explanation:
How is information transmitted through the nervous system? (choose every correct answer.)
Information is transmitted through the nervous system through electrical impulses.
The correct answer choice is option a
This goes to say that information in nervous system are transmitted through the electrical impulses of neurons.
The neurons are the basic and functional unit of the nervous system.
What is nervous system?The nervous system simply refers to the system of the body which helps in the coordination of all the activities which takes place in the body for proper functioning of the body system.
However, the functional unit of the nervous system is the neurons. These neurons help to relay messages or information from one part of the body to another and also to the external environment.
So therefore, information is transmitted through the nervous system through electrical impulses.
Complete question:
How is information transmitted through the nervous system? (choose every correct answer.)
a. Electrical impulses
b. Chemical messengers.
c. None of the above
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All whales are mammals. all mammals live in the ocean . __________________________________ all whales live in the ocean.
The premises and conclusion of the argument are classified as true or false as follows:
All whales are mammals is trueAll mammals live in the ocean is falseWhales live in the ocean is true,The argument is unsound.
What are mammals?Mammals are animals that possess mammary glands which they use to nurse their young ones.
Mammals usually give birth to their young ones alive.
Mammals can be found on land and in aquatic environments.
Some example of mammals on land are:
ManGoatsDogsLionsTigers, etc.Some example of mammals in water are:
whalesdolphinssea lions, etc.Arguments are statement which contains premise(s) and a conclusion.
Arguments can be sound or unsound.
For an argument to be unsound, it must either be invalid or have at least one false premise.
Considering the given arguments:
All whales are mammals is trueAll mammals live in the ocean is falseWhales live in the ocean is trueTherefore, the argument is unsound.
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Note that the complete question is given below as follows:
What is the best description of the following argument?
All whales are mammals is true
All mammals live in the ocean
All whales live in the ocean
ee mj, bransford rj, bellabarba c, chapman jr, cohen am, harrington rm, et al: the effect of bilateral laminotomy versus laminectomy on the motion and stiffness of the human lumbar spine: a biomechanical comparison.
To check variations in movement styles and lumbar backbone stiffness after bilateral laminotomy as opposed to laminectomy.
Summary of heritage information Spondylolisthesis after facet-sparing laminectomy has been mentioned with a frequency of 8% to 31%. Bilateral laminotomies had been proven to be powerful in decompressing the backbone, with out resection of the posterior osteo-ligamentous complex. We hypothesize that bilateral laminotomies set off appreciably much less androgenic hypermobility and much less stiffness discount than a conventional facet-sparing laminectomy withinside the lumbar backbone.
These information display that bilateral laminotomies set off appreciably much less hypermobility and much less stiffness discount in comparison with a complete laminectomy. The renovation of the critical posterior osteo-ligamentous systems can also additionally offer a stabilizing impact in stopping postdecompression spondylolisthesis.
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Match the Polymer to the macromolecule
DNA
Enzyme
Triglyceride
Polysaccharide
A. Protein
B. Lipid
C. Nucleic acid
D. Carbohydrate
Answer:
Enzyme A protein
DNA C Nucleic acid
Triglyceride B Lipid
Polysaccharide D carbohydrate
the three domains of the woese-fox system include the true bacteria in domain bacteria, the extreme microbes in domain, and the eukaryotic organisms in domain.
The three domains of the Woese-Fox system include the true bacteria in domain bacteria, the extreme microbes in domain archaea, and the eukaryotic organisms in domain eukarya.
Archaea is the domain that involves the organisms which are called extremophiles. They are called so because they are not found in normal environments. Their habitats are salty lakes, methane producing areas and hot springs. The examples include: methanogens, halophiles, etc.
Eukarya is the domain which possesses all the eukaryotic organisms. These are the organisms that have cells with well-developed nucleus and cell organelles. The examples of such organisms are; plants, animals, humans, fungi, etc.
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When purified cytochrome oxidase is exposed to cyanide, the cyanide binds reversibly and with high affinity to the enzyme’s active site. What will be the likely outcome if mitochondria are exposed to high levels of cyanide?.
The likely outcome if mitochondria are exposed to high levels of cyanide is that the cyanide will forestall the traffic of electrons along the electron transport chain.
Cyanide inhibits the enzyme cytochrome C oxidase, often known as Complex IV in the electron transport chain. By inhibiting this complex, cyanide effectively prevents electrons from passing along the chain. As a result, no proton gradient can be formed since protons cannot be moved from the matrix to the intermembranous region. In the fourth protein complex, electrons are received by oxygen, the last acceptor.
The oxygen with its extra electrons then combines with two hydrogen ions to form water, boosting the electrochemical gradient even further. Without oxygen, electrons could not be removed from the system, and without a proton gradient, protons would not flow through ATP synthase, resulting in no ATP generation.
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The reproductive isolating mechanism that occurs when the ranges of two species overlap, but they rarely come into contact with one another because they utilize different habitats is?
The ranges of two species overlap, but they rarely come into connect with one another because they utilize different habitats is ecological isolation.
Environmental isolation the division of biological communities as a result of changes to their ecology or their environment. This is one of the processes that results in speciation because there will be a restriction on the movement of genes between the groups that are now separated, and changes in gene frequencies may happen as a result of local selection or drift until the groups eventually become so different that there are no longer any reproductive pathways between them.The mechanisms of reproductive isolation are a group of behavioural patterns, physiological processes, and evolutionary factors important for speciation. They either stop members of various species from having children, or they make sure that any children are sterile.To learn more about ecological isolation.
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In angle class ____ occlusion, the mesiobuccal cusp of the permanent maxillary first molar occludes mesial to the mesiobuccal groove of the mandibular first molar.
In angle class 2 occlusion, the mesiobuccal cusp of the permanent maxillary first molar occludes mesial to the mesiobuccal groove of the mandibular first molar.
Class 2 malocclusion, known as retrognathism or overbite, takes place whilst the higher jaw and enamel seriously overlap the lowest jaw and enamel.
Angle's Class II department 2 malocclusion has a stated horizontal increase sample with reduced decrease anterior facial height, retroclined higher anteriors, and notably elevated maxillary arch width parameters.Class II occlusion takes place whilst the decrease dental arch is posterior (greater toward the lower back of the mouth) than the higher one. In this malocclusion, the higher the front and maxillary enamel undertaking greater ahead than the decrease enamel and the jaw.
The maxillary first molar is commonly the biggest enamel withinside the maxillary arch. It has 4 well-advanced functioning cusps and one supplemental cusp of little realistic use. The 4 massive cusps of maximum physiological importance are the mesiobuccal, the distobuccal, the mesiolingual, and the distolingual.
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Comparison of samples from the liver of an alcoholic with samples from the liver of a non-drinker when examined by transmission electron microscopy would likely reveal that:_________
The transmission electron microscopy would likely reveal that liver cells in an alcoholic individual have expansive smooth endoplasmic reticulum ER organelles when they are compared to the non-alcoholic liver cells.
What is the smooth ER?The smooth endoplasmic reticulum (ER) is a cell organelle that acts to process substances in the cells, which are expanded in individual suffering alcoholic-associated diseases in liver cells.
In conclusion, the transmission electron microscopy would likely reveal that liver cells in an alcoholic individual have expansive smooth endoplasmic reticulum ER organelles when they are compared to the non-alcoholic liver cells.
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In the context of biological and genetic risk and protective factors, the most powerful predictors of individual violent criminality in general are _____.
In the context of the biological and the genetic risk and protective factors, the most powerful predictors of the individual violent criminality in the general are family factors
A felony domestic violence the conviction is the single greatest predictor of the future violent crime. in Between 80 and 90 percent the murderers have prior police records in the contrast to 15 percent of the American adults overall Since this is the single and best predictor of the violence, it is a good idea to ask questions about past or the current violent behavior during your initial contact with the child or the family member. Specifically, you want to know about that person's most violent act, and how often he or she has violent thoughts in his life.
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What structure is responsible for increasing surface area to provide for the strength of attachment between the epidermis and dermis?.
Epidermal ridge structure is responsible for increasing surface area to provide for the strength of attachment between the epidermis and dermis.
Dermal ridges are another characteristic of specific regions of the papillary layer. These ridges result in epidermal ridges, which are ridges in the epidermis above. We refer to those ridges as fingerprints, along with the sweating stains they leave behind.The thickest epidermal layer, the stratum basale connects the epidermis to the basal lamina, which is followed by the layers of the dermis. The skin's strength and flexibility are a result of collagen and elastic fibres, which are essential for providing the underlying skeletal muscles and organs with the structural protection they need. There are two layers in the dermis.To learn more about Epidermal ridge.
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the equilibrium potential for a given ion is the membrane potential at which the ionic concentration inside the cell is equal to the concentration outside the cell.
Higher concentration outside of cell the equilibrium potential for a given ion is the membrane potential at which the ionic concentration.
Ionic concentration – what is it?The ionic strength of a given environment serves as a gauge for its ion concentration. When ionic compounds dissolve in water, ions are created. The overall concentration of electrolytes in the solution will have an influence on important factors like the dissociation constant or the solubility of different salts.
One of the most important characteristics of an ion-containing solution is its ionic strength. For clarity, the units must be provided when expressing ionic strength as either molal (mol/kg solvent) or molar (mol/L solution). Lewis and Randall introduced the concept of ionic strength by describing the activity coefficients of strong electrolytes in 1921.
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The synthesis of sugar molecules through the process of photosynthesis requires energy absorbed from sunlight. Bearing this in mind, what kind of reaction is photosynthesis?.
Explain WHY photosynthesis and respiration are NOT able to create a cycle of energy?
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
In a plant cell, photosynthesis and cellular respiration can both take place simultaneously. Plants carry out both photosynthesis and cellular respiration during the day. Cellular respiration continues because it provides the energy required for essential cell functions.
What role of photosynthesis and respiration in plant?Water and carbon dioxide are changed into oxygen and glucose during photosynthesis. The plant consumes glucose and produces oxygen as a byproduct.
Oxygen and glucose are transformed into water and carbon dioxide during cellular respiration. By-products of the process include carbon dioxide, water, and ATP, which is turned into energy.
To power cellular respiration, photosynthesis uses the energy it produces. During photosynthesis, solar energy is used, collected, and stored in the bonds of glucose molecules.
Therefore, photosynthesis and respiration not involve energy formation cycle.
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This is the most diverse of all the marine ecosystems. This marine ecosystem not only includes great biodiversity but at least one quarter of all ocean species depend on it for food and shelter. What is this marine ecosystem?.
Answer:
Coral reefs
Explanation:
What is the origin of the sun’s energy
Answer:
Collapsed Supernova core
Explanation:
PLEASE HELP FAST
Describe the effects the 3 limiting factors had on the cricket frog population.
Answer: decrease
Increase
Increase
Explanation:
1. When the predators population is increased, there will be high risk to the cricket frog from these predators as they may start attacking them rigorously and ultimately lead to a sharp decline in their population.
2. Pollution is a favorable factor that causes cricket frogs to flourish and increase in number. Thus the higher the pollution level, the higher will be the population of cricket frog
3. Food sources will reduce the competition with in the cricket frog species and hence there population will increase.
20. scully m, knobl p, kentouche k, et al. recombinant adamts-13: first-in-human pharmacokinetics and safety in congenital thrombotic thrombocytopenic purpura. blood. 2017;130(19):2055-2063.
In 15 patients with severe congenital ADAMTS-13 deficiency (plasma ADAMTS-13 activity 6%), the safety, tolerability, and pharmacokinetics of recombinant ADAMTS-13 were examined.
What is pharmacokinetics?
Pharmacokinetics (PK) is the study of how the body responds to drugs over the full exposure period (medications for the sake of this article). Pharmacodynamics, which closely evaluates the drug's impact on the body, is closely related to this yet clearly distinct from it. Absorption, distribution, metabolism, and excretion are the four primary variables this field often evaluates (ADME). Understanding these processes gives medical professionals the freedom to recommend and deliver drugs that will have the most benefit and the lowest danger, as well as to make adjustments as needed in light of the diverse physiology and lifestyles of their patients.
No significant side effects and no anti-ADAMTS-13 antibodies were found. BAX 930 was well tolerated. Adolescents and adults that received a single dose of BAX 930 at 5, 20, or 40 U/kg body weight showed approximately dose proportional maximum plasma concentration (Cmax [U/mL]) and area under the concentration-time curve (AUC [hU/mL]). Individual ADAMTS-13:Ag and activity levels increased in a dose-related manner and peaked within an hour. A dose-dependent persistence of von Willebrand factor (VWF) cleavage products caused by ADAMTS-13 and a smaller VWF multimeric size were seen with increasing BAX 930 dosages. It was shown in this investigation that BAX 930's pharmacokinetic parameters were similar to those predicted in earlier plasma infusion trials and that pharmacodynamic activity was present.
Complete Question
Recombinant ADAMTS-13: first-in-human pharmacokinetics and safety in congenital thrombotic thrombocytopenic purpura
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Neurotransmitters are released from secretory vesicles in neurons by a process called ____________.
Neurotransmitters are released from secretory vesicles in neurons by a process called Acetylcholine.
What is the significance of neurotransmitters?These signals aid in the movement of your limbs, the perception of sensations, the maintenance of heartbeat, and the assimilation and processing of all the information your body receives from other internal organs as well as from the surroundings. Neurotransmitters transfer chemical "messages" from one neuron (nerve cell) to the following target cell.
Acetycholine is tge cheif neurotransmitter of the parasympathetic nervous system, the part of autonomous nervous system that contracts muscle, slows heart rate , dilates blood vessels and increase body secretion.
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Question 3 of 10 Which activity is an example of a descriptive investigation? OA. Gathering data about the effects of different fertilizers on houseplants B. Gathering data comparing two similar rose plants to determine whether they are of the same variety C. Gathering data about the number and type of native plants growing in a city park D. Gathering data about differences in moss growth on the north and south sides of a building
(D) Gathering data about differences in moss growth on the north and south sides of a building is an example of a Descriptive investigation.
The goal of descriptive investigations is to describe a natural or artificial system by gathering qualitative and/or quantitative data (e.g., animal behaviour, electrical circuit, rock formation, cloud). There is a query in a descriptive investigation, but no hypothesis.
Geologists, meteorologists, and astronomers frequently carry out descriptive investigations. An illustration of a descriptive investigation is the classification of leaves. Another illustration is observing behaviour of animals in the wild. In order to provide findings, descriptive investigations use meticulous observations and measurements.
Since there is no hypothesis for the difference in growth of mosses on the north and south side of a building, option (D) is the correct answer.
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Improved body composition is an important outcome of resistance training. What happens as the amount of lean muscle tissue increases?.
As the amount of lean muscle tissue increases, the metabolic rate increases.
How does muscle improve body composition?Your capacity to move and lift items is related to your muscular strength. It is determined by how much weight you can lift for a brief amount of time and how much power you can apply.
Resistance training activities like weightlifting, bodyweight exercises, and resistance band exercises are a few examples of workouts that help build muscle strength and power. Hill climbing, cycling, and running are further alternatives.
Continue reading to find out more about the distinction between physical strength and muscular endurance, as well as the advantages, risks, and workouts for developing muscle strength.
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the us navy determines that the navigation system on its submarines, which use low-frequency radio waves, is reducing the population of humpback whales. the is an example of
The US Navy has determined that the navigation system on its submarines, which uses low-frequency radio waves, is diminishing the humpback whale population. This is an illustration of the law of comparative advantage.
United States Navy (USN)
The United States Navy (USN) is a maritime service branch of the United States Armed Forces and one of the country's eight uniformed services. It is the world's largest and most powerful navy, with the estimated tonnage of its active battle fleet alone exceeding that of the next 13 navies combined, including 11 US allies or partner nations as of 2015.
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How does tetanic contraction of muscles help to lift objects heavier than our body weight?
The tetanic contraction of muscles help to lift objects heavier than our body weight by generating force, overcoming resistance.
What is muscle?
Muscle is defined as group of tissue combined together in order to form muscles and muscles are the structure maker of the body it means it provide proper structure to the body.
Muscle contraction has been defined as an action potential that travels along with the nerves to the muscle. The beginning of the muscle contraction occurs with signal generated from the nervous system.There are mainly two types of muscle contraction and the situation occur when a muscle contracts and the change in size takes place.
Therefore, The tetanic contraction of muscles help to lift objects heavier than our body weight by generating force, overcoming resistance.
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Help please! worth 100 points. no links
hom-ozygous tall pea plants look the same as heterozygous tall pea plants. formulate a pollination experiment to identify whether a tall pea plant is hom-ozygous or heterozygous. explain your answer in 3-5 sentences.
When crossing two tall plants, we can use a punnet square to forecast the progeny, and we'll base our experiment on those odds.
What is punnet square ?Punnet square is the tool which is used to find the probability of outcomes .
Many geneticists utilize a punnet square as a tool. The genetic make-up of the parents is used to infer the genetic make-up of the offspring. Probabilities for each outcome will be provided by the punnet square. On the basis of homozygous and heterozygous alleles, we can create an experiment in which predictions are made using a punnet square.
We can only guarantee 100% tall plants when using two homozygous plants, and we can only promise 100% short plants when using two heterozygous plants.
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The children that result from crossing two tall plants can be predicted using a punnet square, and the experiment that will be conducted will be based on those probabilities.
What is punnet square used for?Numerous geneticists use the punnet square as a tool.
It determines the genetic makeup of the offspring based on the parent's genetic makeup.
We can calculate the odds of each outcome using the punnet square.
We can only grow tall plants with 100% accuracy when using two homozygous plants, and short plants with 100% accuracy when using two heterozygous plants.
To identify the homozygous and heterozygous plants, we can continue the tests until a small plant arises, or we can only grow tall plants.
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What is the relationship between organisms and atoms? *cover all levels of organization up to the entire organism
Answer:
all organisms are made of a combination of atoms
Explanation:
they contain atoms that combine together to form molecules. in mulilticellar organisms, such as animals, molecules can interact to form cells that combine to form tissues, which make up organs.
The relationship between organisms and atoms is fundamental to the understanding of life and the natural world.
Atoms, the building blocks of matter, combine to form molecules, which in turn constitute the essential biomolecules for living organisms. These biomolecules, such as proteins, carbohydrates, lipids, and nucleic acids, are vital for cellular structure, function, and regulation.
The interactions of atoms within molecules dictate biological processes like metabolism, cell signaling, and DNA replication. Organisms consist of cells, tissues, organs, and systems, all functioning based on atomic interactions.
Thus, the intricate relationship between atoms and organisms underscores the profound connection between the smallest components of matter and the complexity of life itself.
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Another word for characteristics of a living thing?
Answer:
tasks because if a person or being is alive then it does any sort of task
If the ocular has a 10X magnification and the high powered objective has a 40X magnification, what is the total magnification of the microscope?
The magnification of the microscope is 400X
What is the magnification of a microscope?The magnification of a microscope is the extent to which the microscope will enlarge the size of an object viewed through it.
Magnification is defined as the ratio of the image size to the object size.
Mathematically:
Magnification = image size or height/object height or sizeThe magnification of a microscope is obtained from the product of the magnification of the ocular lens and the high powered objective lens.
The magnification of the given microscope = 10X * 40X
Magnification of the microscope = 400X
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When kinetic energy is the same what happens to the velocity when the mass increases
The velocity would decrease because mass and velocity are inversely related. The equation for Kinetic Energy is: KE = 1/2 mv2. Kinetic energy has a direct relationship with mass, meaning that as mass increases so does the Kinetic Energy of an object. The same is true of velocity.
Answer:The velocity decreases.
Explanation:
Kinetic energy has a direct relationship with mass, meaning that as mass increases so does the Kinetic Energy of an object. The same is true of velocity.
WILL MARK BRAINLIST AND 5 STAR AND A THANKS
Answer:6, -4
Explanation:go down from the 6 on the right 6go across from the 4 on the bottom it is -4 put it together 6,-4