MCQ Detailed View

Muscles in the human body are classified into three main types: skeletal muscles, cardiac muscles, and smooth muscles. Based on how they function, they can be grouped as voluntary or involuntary muscles.

Voluntary muscles are those which are under our conscious control. This means we can move them whenever we want. These muscles are attached to bones and are also called skeletal muscles. One example of a voluntary muscle is the biceps.

The biceps are located in the upper arm. They help in lifting and bending the arm. Because you can control their movement — like flexing your arm or lifting an object — they are classified as voluntary muscles. These muscles are made up of long fibers and show striations (striped appearance) under a microscope.

Now, let’s look at the other options:

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  Cardiac muscle is found only in the heart. It works automatically without conscious control, so it is involuntary.

  
  


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  The muscles in the stomach are smooth muscles. These also work involuntarily to help digest food.

  
  


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  The walls of blood vessels also contain smooth muscle, which controls blood flow automatically and is also involuntary.

  
  

So, among the given choices, the correct answer is Biceps — a voluntary skeletal muscle. It is part of the muscular system that we use for actions like walking, lifting, and writing.

Understanding the difference between voluntary and involuntary muscles is essential in biology, especially when studying how our body systems are controlled and coordinated.

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