BIOLOGY HIGH SCHOOL

Which of these valves prevents a backflow of blood into the left atrium?aortic valve

tricuspid valve

mitral valve

Answers

Answer 1
Answer: The answer would be the mitral valve. The mitral valve is the one responsible for preventing any backflow of the blood into the left atrium. The mitral valve functions between the left atrium and left ventricle, and it contains two tapered cusps.
Answer 2
Answer:

Final answer:

The mitral valve prevents a backflow of blood into the left atrium. It closes when the heart contracts, preventing blood from flowing back. Other valves like the aortic and tricuspid have different functions.

Explanation:

The mitral valve, also known as the bicuspid valve, is the valve that prevents a backflow of blood into the left atrium. This valve is located between the left atrium and the left ventricle. When the heart contracts, the mitral valve closes, preventing blood from flowing back into the atrium. The other valves listed, the aortic valve and the tricuspid valve, have different functions. The aortic valve controls blood flow from the left ventricle into the aorta, and the tricuspid valve prevents backflow of blood into the right atrium.

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Please help me really quick :)

Answers

Answer:

carbon dioxide is removed by respiratory organs

Explanation:

the cardiovascular system transports waste products to other systems
i’m pretty sure it’s the first one (aka A)

Which statement best distinguishes glycolysis and the Krebs cycle from the electron transport chain

Answers

The answer is the amount of ATP produced.

How is it possible to have thousands of different proteins when there are only 20 different amino acids

Answers

The 21 amino acids can be arranged in many different ways. It is possible with just this small number of amino acids to create thousands of different types of proteins. Think of amino acids like they were little connecting blocks, such as legos. You have 21 of them before you. How many different ways can you arrange them? The formation of protein is similar. 

Read the situation and answer the questions that follow. Imagine that a friend asks you for investment advice. He has $10,000 to invest and he has about 35 years before he will be ready for his financial goal of early retirement.
1. What type of investment would you recommended to your friend? Why?
2. What other investing advice would you give him to help him achieve his financial goals?

Answers

1. The type of investment that I would recommend to my friend would be mutual funds because it's good for long term goals such as retirement. Mutual funds are more convenient because it allows my friend's money for $10,000 to be invested in different avenues such as stocks, bonds, money market and others. The fund manager's goal is get capital gains and income for the investor or in this case, my friend. 
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The energy transformations in a car’s engine are an example of multiple transformations. True or False?

Answers

Answer;

The above statement is true.

The energy transformations in a car’s engine are an example of multiple transformations.

Explanation;

  • From the law of conservation of energy, energy can neither be destroyed nor created but can be transformed from one form to another.
  • Energy transformation occurs when a transducer or a machine converts energy from one form to another. Examples of traducers includes, bulb, generator, etc.
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A.TRUE...........................

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Answers

Answer;

- the chance that something will happen

Explanation;

Probability is the extent to which something is probable; the likelihood of something happening or being the case. It is the chance that something will happen.

- We say it is the likelihood of an event happening, an event being a set of outcomes of an experiment to which a probability is assigned. Probability may be calculated by getting the ratio of the favorable (wanted) outcomes divided by the possible outcomes.

The probability of a given event is a measure of the likelihood that the event occurs. Probability, itself, is the branch of mathematics which studies how such a measure can be calculated or estimated and of how the probabilities of events can be combined.
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