Which of the following correctly describes the appearance of muscle tissue found in the heart? (2 points) Single-nucleus, non-striated, short cells Single-nucleus, striated, branching cells Multinucleated, non-striated, branching cells Multinucleated, striated, long threadlike cells

Answers

Answer 1

Answer:

The correct option is B.

Explanation:

Muscle tissues of the heart refers to a group of cells that are carrying out similar functions in the heart. There are three different types of muscles, these are skeletal, cardiac and smooth muscles. The cardiac muscles are found in the heart, they form the contractile wall of the heart. These muscle contract involuntarily ( that is, without any external stimulation) and they are single nucleus, striated and short.

Answer 2

Answer:

The correct answer is B. Single-nucleus, striated, branching cells.

Explanation:

This is because the heart has to communicate with itself, and to do that, it has to have branching cells. In addition, the heart has to continue pumping all of the time for many years, so the structure has to be thick and sturdy.

Hope this helps!

Related Questions

What is normal ejection fraction of heart?

Answers

Answer:

The normal ejection fraction of heart is 55% to 75%

Explanation:

Ejection fraction may be defined as the amount of blood pumped in the left and right ventricle during the normal heart beat. The main pumping chamber of heart is left ventricle.

55% to 75% is the normal ejection fraction of the heart. The normal ejection fraction of heart refers the normal pumping ability of heart. The ejection fraction range below or above the normal may indicate the improper functioning of heart.

The normal ejection fraction (EF) of the heart ranges from 55-70 percent, representing the percentage of blood pumped out of the ventricles with each contraction. EF is calculated as (SV / EDV) ×100. Assessing EF is important for diagnosing and monitoring heart function.

The ejection fraction (EF) is a measurement used to assess how well the heart is pumping blood. It refers to the percentage of blood that is pumped out of the heart's ventricles with each contraction.

The normal ejection fraction for a healthy heart typically ranges from 55-70 percent, with an average value around 58 percent.To calculate the ejection fraction, you divide the stroke volume (SV) by the end-diastolic volume (EDV) and then multiply by 100 to get a percentage: EF = (SV / EDV) × 100. Stroke volume is the amount of blood pumped by the left ventricle in one contraction and can be measured via an echocardiogram.A normal range for stroke volume varies between 55-100 mL, with an average around 70-80 mL. End-diastolic volume, which is the total amount of blood in the ventricle before it contracts, is approximately 130 mL during rest.Understanding ejection fraction is crucial in diagnosing and monitoring heart failure and other cardiac conditions. Lower than normal EF may indicate a weakened heart muscle, while higher than normal values can be seen in some cases of hypertrophic cardiomyopathy.

The sympathetic division uses ______ as a neurotransmitter for cholinergic receptors and ______ for adrenergic receptors.
a. ACh/ACh
b. NE/E
c.Ach/NE
d. NE/Ach
e. E/Ach

Answers

Answer:

Ach/NE

Explanation:

Autonomic nervous system is divided into sympathetic nervous system and para sympathetic nervous system. Sympathetic nervous system controls the emergency response of the body.

Acteylcholine is used as a neurotransmitter for the cholinergic receptors of the sympathetic nervous system. Norepinephrine is used as a neurotransmitter for adrenergic receptor for the sympathetic division of autonomic nervous system.

Thus, the correct answer is option (C).

Answer:

c.Ach/NE

Explanation:

The sympathetic division uses Ach as a neurotransmitter for cholinergic receptors and NE for adrenergic receptors.

The result of an elderly woman's bone density test indicates that her bones are losing mass. What preventive measure can she take to slow her bone loss?

Answers

A calcium supplement regiment and physical therapy. In addition a diet change and light exercise.

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