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Ganezh [65]
3 years ago
10

Norepinephrine acts on the heart by _________

Medicine
1 answer:
Westkost [7]3 years ago
6 0

Answer:

The correct option is : a. causing threshold to be reached more quickly      

Explanation:

Norepinephrine, also known as noradrenalin, is an organic compound, which belongs to the catecholamine family. It acts as a hormone and a neurotransmitter in the brain and the body and also impacts the heart.

It is one of the hormones secreted by the adrenal medulla. Norepinephrine is a part of the fight-or-flight mechanism of the body. It acts by binding to the β-1 receptors and opens the chemical or ligand gated calcium and sodium ion channels. Therefore, <u>it causes the threshold to be reached faster </u>by increasing the rate of depolarization and thus causes heart arrhythmia.

Therefore, <u>Norepinephrine acts on the heart by </u><u>causing threshold to be reached faster.</u>

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5. The terms ac, al, ary, and ic are all
alexdok [17]

The terms ac, al, ary, and ic are all adjective suffixes meaning "pertaining to."

<u>Explanation:</u>

The terms ac, al, ary, and ic are adjective suffixes. this means that "pertaining to". For instance let us take some words like, Cardiac, cephalic, congenital, integumentary,etc. the meaning of these words are pertaining to heart,head,presence of birth,skin respectively.

Here, the terms ac,al,ary,ic all refers to pertaining to. The term pertaining to refers to the meaning that it belongs to or related to something. It also refers to the meaning of applicable or appropriate or relevant.

4 0
3 years ago
Which of the following pairs is mismatched?
alex41 [277]

Answer:

The correct answer is D.

Explanation:

Papillary muscles, attached via chordae tendineae, help to close the valves and prevent regurgitation.

Pectinate muscles are parallel ridges in the walls of the atrium of the heart, mainly in right atrium. They can stretch during adverse loading conditions, to <em>help the right atrium to dilate without much wall stres</em>s.

8 0
3 years ago
The nurse begins the physical examination of a newly admitted client by assessing the client's mental status. What is the nurse'
barxatty [35]
The client will be less anxious early, providing the nurse with more accurate and reliable data. The exam can provide clues about the validity of the client's responses now and throughout.
3 0
3 years ago
A 70-year-old male sees a cardiologist for his annual check-up. He has a heart rate of 80 bpm, stroke volume is 50 ml, and blood
Colt1911 [192]
CO= HRXSV
CO=80X50
CO=4,000 ml

1L=1,000ml
4,000ml=4L
Therefore the answer is 4L/min
5 0
3 years ago
2. Why do plants have different colours and smells?
Annette [7]

Answer:

Color comes from a flower's hereditary genome. These genomes determine what pigments a flower will have, and pigments yield different colors.

6 0
3 years ago
Read 2 more answers
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