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Alex Ar [27]
3 years ago
6

[40 POINTS!!!!]

Biology
2 answers:
ipn [44]3 years ago
6 0

Answer:

A. It will lower blood pressure because less blood is pumped per beat.

Explanation:

I thought B might be a potential answer, but since the atria are not filling properly and heart rate is increased, it would make sense that blood pressure drops (effect of faster heart contraction is negated by the drop in blood volume in the atria).

Greeley [361]3 years ago
5 0
The answer is B. It will increase blood pressure because the heart is contracting faster
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A — is a protein that recognizes and responds to a signal
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A <u><em>receptor</em></u> is a protein that recognizes and responds to a signal.

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A receptor is a protein molecule present on the cells on which the signalling molecules can bind and generate a physiological response. Some receptor molecules can also respond to Sun and light. Each type of cell has specific receptors molecules and hence can respond to specific signals. The receptor molecules hence tend to receive signals for a cell. Molecules such as hormones bind to the receptors.

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3 0
3 years ago
The center of an atom is ________.
Airida [17]
The center of an atom is a nucleas. you can find this answer in most textbooks on science
3 0
3 years ago
Read 2 more answers
Please help<br> Explain why a lack of gravity might cause muscles to weaken
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If on Earth your arm weighs 3 pounds, the muscle will only have to move 3 pounds of force. For example, if you were to go on the moon, your arm would have the same mass but there would be less gravity pulling it dow. So now your muscles only need to pull 1 pound. Over extended periods, you would be working less, thus not using your muscles to fullest potential and in result you would get weaker.

7 0
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As mean arterial pressure increases, the ________, informing the medulla oblongata that blood pressure has indeed increased.
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As mean arterial pressure increases, <u>the frequency of action potentials from the </u><u>baroreceptors</u><u> increases,</u> informing the medulla oblongata that blood pressure has indeed increased.

  • Special receptors called baroreceptors monitor variations in your blood pressure.
  • The aorta and carotid sinus both contain significant baroreceptors. The walls of the arteries stretch when the blood pressure in the aorta or carotid sinus rises, stimulating an increase in baroreceptor activity.
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learn more about baroreceptors here: brainly.com/question/8963123

#SPJ4

7 0
2 years ago
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