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docker41 [41]
3 years ago
12

After listening to Janetta's heart for several seconds, her doctor told Janetta that she has an incompetent right atrioventricul

ar (AV) valve. What did Janetta's doctor hear that led to that conclusion?
Biology
1 answer:
3241004551 [841]3 years ago
5 0

Answer:

Swishing sound.

Explanation:

Human heart produces unique sound when blood flows from one chamber to the next chamber. The two main sounds produced by heart are lub abd dub sound.

The doctor's examine the Janetta's heart and told that she has incompetent right atrioventricular valve. The doctor must have heard the swishing sound after the closing of right atrioventricular valve. This sound is the direct indication of incompetent AV valve.

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Answer:

The correct answer is c) opsonins

Explanation:

Opsonization is a process in which proteins like antibodies and complement proteins called opsonins bind to the antigens and get it recognized by the phagocyted which destroys the antigen.

Especially when bacteria is having external capsule than it becomes difficult for phagocytes to attach to the capsular surface as the recognition molecule like membrane carbohydrate of antigen is concealed by capsule.

So to encounter this, antibodies like IgG and complement proteins like C3b attaches to the antigen and get it recognized and opsonized by the phagocytes like macrophages. This opsonization causes the destruction of antigen by enzymatic lysis.

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3 years ago
How are plant and animal cells different? Animal cells have lysosomes and plant cells do not. Animal cells have vacuoles and pla
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Your answer is B Plant cells have cell walls instead of cell membranes because plants have cell walls to support, protect, and carry water through out the cell animals cells don't have that. Its also not A because they both have vacuoles its not C because they both have choralpast.

Your answer is B.

BTW if not B its all of the above.
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3 years ago
Read 3 more answers
As humans grow, their bodies change.” Which statement best explains how humans grow?
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Answer: Cells undergo cell division

Explanation:

"As humans grow, their bodies change.” The statement that best explains how humans grow is that cells undergo cell division.

When cells divide, thus brings about the making of new cells. This is referred to as cell division or cell reproduction. In this case, a single cell divides and then brings about two cells, then these two cells later make four cells .... This is unique and vital for every living organisms.

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Answer:

A carbon atom can form four covalent bonds, it also bonds with other carbon atoms to form long-chain molecules of different sizes and shapes.It's electronegativity on Pauling scale is 2.55 due to which when it bonds with elements like oxygen, hydrogen the bond formed is quite strong.

Explanation:

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GarryVolchara [31]

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The stress syndrome evolves in three successive stages:

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*"Resistance stage": adaptation to the stressor

*"Stage of exhaustion": inexorably reached if the stressor is sufficiently powerful and acts a long time.

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