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3 years ago

At which position on an electrocardiogram do the atria contract?

Biology

1 answer:

nordsb [41]3 years ago

7 0

Answer:

P wave

Explanation:

Electrocardiogram records the strength and timing of electrical activity in heart. As various regions of heart contract at different times and for different duration, the electrical activity is not constant and shows a series of rise and fall. There are three main components of ECG: P wave, QRS complex and T wave.

P wave indicates the beginning of electrical signal in the right atrium. The signal spreads in both right and left atria which leads to their contraction. As a result, blood is pumped into the ventricles and rest of the process occurs.

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Distinguish between the plant cells<br> and animal cells

soldier1979 [14.2K]

Answer:

Similarities Between Plant and Animal Cells

Animal Cell

Plant Cell

Domain Eukarya Eukarya

Cell Wall No Yes (made of cellulose)

Vacuole Either none or a few very small througho ... One very large also called the “central ...

Mobility Can be mobile and fluid Not mobile or fluid

5 more rows ...

Sep 5 2021

Explanation:

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3 years ago

In cardiac muscle In cardiac muscle an action potential spreads throughout the Z discs. intercalated discs connect the muscle fi

Anastasy [175]

In cardiac muscle

a. an action potential spreads throughout the Z discs.

b. intercalated discs connect the muscle fibers together.

c. calcium enters the cell from storage chambers called intercalated discs.

d. potassium is released from the sarcoplasmic reticulum

Answer:

b. intercalated discs connect the muscle fibers together.

Explanation:

Intercalated discs are components of the muscles found in the heart(cardiac muscles).

Intercalated discs join the cardiomyoctes (muscle cells or fibers) together so that they can function as one and transmit signals amongst themselves during the contraction of the heart.

Intercalated discs are made of up desmosomes and gap junctions.

Intercalated discs are found on the lining of the sacromere and can only be seen by using a microscope to observe the longitudinal section of the heart tissue.

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3 years ago

Read 2 more answers

Data that represents qualities or characteristics that cant be expressed by a number

dimulka [17.4K]

Variables is likely the correct answer.

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4 years ago

What happens to the speed of light as it moves from:<br> a.Gas to a solid?<br> b.Liquid to gas?

Hoochie [10]

Answer:

Explanation:

I think its A but it can also be made to condense into a liquid

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3 years ago

What are the two broad categories of plants?

blsea [12.9K]

The best and most correct answer among the choices provided by your question is the second choice or number 2.

The two broad categories of plants are trachaeophytes and bryophytes.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

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3 years ago