Anatomy & Physiology Musculoskeletal #21

Question

Which system is responsible for the contraction and relaxation of the muscles within the human body?

Answers

  1. Cardiac
    • Rationale:

      The cardiac system contains the heart which is responsible for pumping blood throughout the circulatory system. While the heart tissue contains cardiac muscle, this system is not responsible for the contraction and relaxation of muscles within the human body.

  2. Nervous
    • Rationale:

      The nervous system also regulates the speed at which food moves through the digestive tract via peristalsis. Receptors for the nervous system in muscles provide the brain with information about body position and movement.

  3. Endocrine
    • Rationale:

      The endocrine system is responsible for hormone regulation within the body. It is not responsible for the contraction and relaxation of muscles within the human body.

  4. Musculoskeletal
    • Rationale:

      While muscles are contained in the muscular system, a subset of the musculoskeletal system, this system is not responsible for the contraction and relaxation of muscles within the human body.

Overview

The musculoskeletal system is broken down into two subsystems, the muscular system and the skeletal system.

Explanation

Learning Outcomes

The muscular system can be described as having three different types of muscles; they are cardiac, skeletal, and smooth muscles. There are two primary types of muscle tissue: superficial muscle tissue and deep muscle tissue. It is the nervous system that is responsible for both the relaxation and contraction of the muscles within the human body.

Test Taking Tip

Consider which system is responsible for sending signals to the muscles of the body for movements to occur to answer this question correctly.

Video Rationale