Long refractory period is present in a)Smooth musclesb)Cardiac musclesc)Striated muscles d)None of theseCorrect answer is option 'B'. Can you explain this answer?

Question

Long refractory period is present in  a)Smooth musclesb)Cardiac musclesc)Striated muscles d)None of theseCorrect answer is option 'B'. Can you explain this answer?

Answer

Answer

Yes in cardiac muscles because they have more number of mitochondria. They do not get tired

Answer

Long refractory period is present in Cardiac muscles

Cardiac muscles have a unique property called the refractory period, which is the period of time during which the muscle cannot be re-stimulated to contract again. This refractory period is longer in cardiac muscles compared to other types of muscles.

Refractory Period:
The refractory period is a critical property of muscle tissue that ensures proper relaxation and prevents sustained contractions. It is the time interval during which the muscle cannot respond to a new stimulus and is unable to contract again. This period allows the heart muscle to reset and prepare for the next contraction.

Smooth Muscles:
Smooth muscles are found in the walls of hollow organs such as the intestines, blood vessels, and uterus. These muscles have a short refractory period, allowing them to contract and relax rapidly. This property allows for the smooth, rhythmic contractions needed for functions such as peristalsis in the digestive system.

Striated Muscles:
Striated muscles, also known as skeletal muscles, are responsible for voluntary movements. These muscles have a shorter refractory period compared to smooth muscles but longer than cardiac muscles. The refractory period in skeletal muscles allows for precise control of muscle contractions and prevents sustained contractions.

Cardiac Muscles:
Cardiac muscles are found only in the heart and are responsible for its rhythmic contractions. These muscles have a long refractory period, which is essential for the proper functioning of the heart. The long refractory period in cardiac muscles ensures that the heart has enough time to relax after each contraction before it can be stimulated again. This prevents the heart from entering a state of sustained contraction, which could be detrimental to its function.

The long refractory period in cardiac muscles is crucial for maintaining the coordinated contraction and relaxation of the heart chambers, allowing for efficient pumping of blood throughout the body. It also helps in preventing arrhythmias and maintaining the electrical stability of the heart.

In summary, the correct answer is option B - Cardiac muscles have a long refractory period compared to smooth muscles and striated muscles.

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