Question

In cardiac muscle In cardiac muscle an action potential spreads throughout the Z discs. intercalated discs connect the muscle fibers together. calcium enters the cell from storage chambers called intercalated discs. potassium is released from the sarcoplasmic reticulum.

Answer 1

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.

Answer 2

Answer:

Option C => intercalated discs connect the muscle fibers together.

Explanation:

The cardiac muscle is a skeletal muscle tissue and one out of the three types of skeletal muscle tissue. The cardiac muscle is found in the heart and it is saddled with the responsibility of pumping blood.

In order to be able to pump blood to the vessels, he does it by pumping the blood into the circulatory system and this is done with the help of the contraction of the intercalated disc. The intercalated disc is use in the attachment of fibres of cardiac muscle.