Cardiac muscles Fibres :-a)Involuntaryb)Non-fatiguec)Striated liked)AllCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Cardiac muscles r the special types of muscle present in the heart ....these muscles have striated appearance...nd they works involuntary...ie by their own control...

Answer

Cardiac muscle is found only in the walls of the heart. When cardiac muscle contracts, the heart beats and pumps blood. Cardiac muscle contains a great many mitochondria, which produce ATP for energy. This helps the heart resist fatigue. Contractions of cardiac muscle are involuntary, like those of smooth muscle. Cardiac muscle, like skeletal muscle, is arranged in bundles, so it appears striated, or striped.

Hence, the answer is (D)

Answer

D

Answer

Involuntary:
Cardiac muscles are involuntary muscles, which means they are not under conscious control. Unlike skeletal muscles, which are controlled by the somatic nervous system, cardiac muscles are regulated by the autonomic nervous system. The autonomic nervous system controls various physiological processes, including heart rate and contraction strength, without conscious effort.

Non-fatigue:
Cardiac muscles are non-fatigue muscles, meaning they do not tire easily. This is because cardiac muscles have a rich supply of mitochondria, which produce energy in the form of ATP. The continuous supply of ATP allows the cardiac muscles to contract and relax without fatigue for an extended period.

Striated:
Cardiac muscles are striated muscles, which means they have a striped appearance under a microscope. This striation is due to the arrangement of contractile proteins called actin and myosin within the muscle fibers. The striated pattern allows for coordinated and efficient contraction of the cardiac muscles, enabling the heart to pump blood effectively.

All:
The correct answer is option 'D', which states that cardiac muscles have all the given characteristics - they are involuntary, non-fatigue, and striated. These characteristics are unique to cardiac muscles and differentiate them from other types of muscles in the body.

In summary, cardiac muscles are involuntary, non-fatigue, and striated muscles. They are regulated by the autonomic nervous system, do not tire easily due to their rich mitochondrial supply, and have a striped appearance due to the arrangement of contractile proteins. These characteristics enable the efficient and continuous pumping of blood by the heart.

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