Question Video: Describing the Major Functions of Muscles Biology

Which of the following is not a major function of muscles within the human body? [A] To move certain parts of the body [B] To produce and secrete red blood cells [C] To aid in the digestion of food [D] To contract blood vessels and continuously move blood through them [E] To maintain the posture of the body in a stationary position

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Video Transcript

Which of the following is not a major function of muscles within the human body? (A) To move certain parts of the body. (B) To produce and secrete red blood cells. (C) To aid in the digestion of food. (D) To contract blood vessels and continuously move blood through them. Or (E) to maintain the posture of the body in a stationary position.

To answer this question, let’s look at the main roles of the various muscles found in the body. Muscles help various parts of the body to move or apply pressure by contracting and relaxing. There are three main types of muscle that carry out different functions: skeletal muscle, smooth muscle, and cardiac muscle.

Skeletal muscles are attached to our bones and can be controlled voluntarily to allow the movement of certain body parts. For example, skeletal muscles enable us to move our limbs, which are our arms and our legs. They also help us to maintain our posture.

Smooth muscle and cardiac muscle are involuntary muscles, which means that we cannot consciously control their movement. Smooth muscle is found in lots of different organ systems, such as in our stomach and intestines, where it helps to move food through the digestive system. Smooth muscle is also found in the walls of arteries, where it contracts to help move blood through these vessels continuously. Cardiac muscle is found in the heart, where it beats in a continuous rhythm of contraction and relaxation to keep blood pumping around your body.

If we take a look back at the possible answers to this question, we can see that the only major function we haven’t discussed is the production and secretion of red blood cells. Red blood cells are not made or secreted by muscle, but by the bone marrow. Therefore, the correct answer to this question asking us to deduce the answer which is not a major function of muscles in the human body is (B), to produce and secrete red blood cells.

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