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Fed [463]
3 years ago
8

In reference to the electrical activity of the heart, what signals the end of the cardiac cycle

Biology
1 answer:
Lelu [443]3 years ago
3 0

Answer:

The electrical impulse travels from the sinus node to the atrioventricular node (also called AV node). There, impulses are slowed down for a very short period, then continue down the conduction pathway via the bundle of His into the ventricles.

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Blood vessels that absorb strong pressure pulses contain more of this type of tissue.
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Blood vessels that absorb strong pressure pulses contain more of elastic<span> tissues. These tissues are bundles of protein that can be found in extracellular matrix of connective tissue. These are produced by fibroblasts and smooth muscle cells found in arteries.
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7 0
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What is the term for a localized group of organisms belonging to the same species?
77julia77 [94]

Answer:

c. population

Explanation:

A localised group of organisms that belong to the same species is called Population. This can be a local population if the organisms stay at a particular place or a metapopulation if the organisms tend to move from one geographical location to another.

4 0
2 years ago
Which of the following is a characteristic of vertebrates?
IRINA_888 [86]

It's actually A. Vertebrate have a hard out shell.

4 0
4 years ago
M+n=5••••••(I)<br>m-n=-1•••••••(ii)​
nydimaria [60]

Answer:

3+2=5

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Explanation:

7 0
3 years ago
When the triceps brachii extends the arm, the levator
sineoko [7]

Answer:

the triceps brachii of the posterior arm is an agonist that causes forearm,this muscle helps depress and protract (pull anteriorly) the scapula and rhomboid minor also works as a synergist to the Pectoralis major in flexing and adducting the arm,the serratus anterior differs from the subclavius and pectoralis minor in that. Functional demands have resulted in the evolution of individual muscles from the basal unit formed by the serratus anterior. In primitive life forms, the main function of the axioscapular group is to control the movements of the vertebral border of the scapula: fibers concerned with the dorsal movement of scapula evolved into the rhomboids, those with ventral motion into serratus anterior, and those with cranial movements into levator scapulae. The evolution of the serratus anterior itself has resulted in (1) grouping of its distal and proximal fibers, (2) size reduction of its intermediate fibers, and (3) the insertion of its dominant superior and inferior parts onto the superior and inferior angles of the scapula

Explanation:

5 0
3 years ago
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