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3 years ago

He cells of the ___________ act as the heart's pacemaker, which establishes the pace for cardiac activity.

2 answers:

7 0

He cells of the <span>sinoatrial (SA) node act as the heart's pacemaker, which establishes the pace for cardiac activity.
</span>The SA node is one of the major elements in the cardiac conduction system. It consists of a cluster of cells that are situated in the upper part of the wall of the right atrium (the right upper chamber of the heart) and is responsible for generation of electrical impulses.

enot [183]3 years ago

4 0

The cells of SA node acts as the heart's peacemaker which establishes the pace for cardiac activity.

Sinoatrial node is also called sinus node.
SA node is termed as a group of cells which are located in the wall of the right atrium of the heart. Cells have the ability to produce electrical impulse. It travels to the heart via electrical conduction system which causes it to contract.
It produces action potential and also sets the rhythm of the heart.

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According to sigmund freud, which part of the mind is composed of biological drives and consequently is the source of psychic en

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The unconscious id, according to Sigmund Freud, was the part of the mind composed of biological drives and the source of psychic energy.

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3 years ago

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1. Jubilee is beginning first grade. Everyday, the

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Answer:

a. Unconditioned Stimulus (US) – Teacher saying jump

b. Conditioned Stimulus (CS) – Clearing the throat, saying Uhmmmm... and then banging the stick/ruler and saying jump

c. Unconditioned Response (UR) – Jumping after hearing the word “jump”

d. Conditioned Response (CR) – Jumping after hearing Uhmmmm….banging of ruler and word “jump”

Explanation:

Unconditioned response is one in which the response generated in natural while in conditioned response, response is generated in unnatural fashion.

Likewise, unconditioned stimulus is a natural causing factor behind any natural response while conditioned stimulus is an unnatural causing factor behind any unnatural response.

a. Unconditioned Stimulus (US) – Teacher saying jump

b. Conditioned Stimulus (CS) – Clearing the throat, saying Uhmmmm... and then banging the stick/ruler and saying jump

c. Unconditioned Response (UR) – Jumping after hearing the word “jump”

d. Conditioned Response (CR) – Jumping after hearing Uhmmmm….banging of ruler and word “jump”

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4 years ago

C.What happens to the atomic number as you move right on the periodic table?

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Answer: the atomic number will increases

Explanation:

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3 years ago

A protist can be described as all of the following except:

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B: single celled because protest has more than one cells

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4 years ago

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(4.01 MC)Which method best describes how an organism regulates blood glucose levels after consumption of a large meal

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Question is incomplete i have added complete question in ask for detail section and at the end of this question.

Answer:

b. using negative feedback to decrease blood glucose levels

Explanation:

When the level of glucose increases in the blood and become higher than the normal level a negative feedback mechanism is initiated under the control of hypothalamus. which increase the metabolism of excessive glucose level present in blood and hence results in decrease or normalization of glucose level in blood.

Reference: Mayer, Jean. "Glucostatic mechanism of regulation of food intake." New England Journal of Medicine 249.1 (1953): 13-16.

Complete question

Which method best describes how an organism regulates blood glucose levels after consumption of a large meal?

a. using negative feedback to increase blood glucose levels

b. using negative feedback to decrease blood glucose levels

c. using positive feedback to increase blood glucose levels

d. using positive feedback to decrease blood glucose levels

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4 years ago