Anatomy & Physiology Musculoskeletal #36

Question

Which ion works with nerve impulse transmission for muscle contraction to occur in the human body?

Answers

  1. Sodium
    • Rationale:

      Sodium ion transport is not required for skeletal muscle contractions to occur within the human body.

  2. Calcium
    • Rationale:

      Calcium ion transport, along with nerve impulse transmission, are required for skeletal muscle contractions to occur within the human body.

  3. Potassium
    • Rationale:

      Potassium ion transport is not required for skeletal muscle contractions to occur within the human body.

  4. Magnesium
    • Rationale:

      Magnesium ion transport is not required for skeletal muscle contractions to occur within the human body.

Overview

A muscle contraction is defined as the process which leads to shortening and/or development of tension in muscle tissue.

Explanation

Learning Outcomes

Muscle contraction occurs in three periods: the latent period, the contraction period, and the relaxation period. During the latent period, nothing appears to happen; however, during the contraction period, the muscle fibers shorten and it lengths during the relaxation period. Skeletal muscle contraction involves the transport of calcium ions and the transmission of nerve impulses.

Test Taking Tip

Consider the role of each ion to determine the correct choice for this question.

Video Rationale