Anatomy & Physiology Musculoskeletal #30

Question

Which location within the human body is under involuntary control by smooth muscles?

Answers

  1. The lungs.
    • Rationale:

      The lungs do not contain smooth muscles. The work of breathing is done by the abdominal muscles, the diaphragm, the intercostal muscles, and the muscles in the neck.

  2. The urinary bladder.
    • Rationale:

      Smooth muscles are found in visceral organs, including the urinary bladder. Smooth muscles are not under voluntary control.

  3. The upper extremities.
    • Rationale:

      The upper extremities contain skeletal, not smooth, muscles.

  4. The lower extremities.
    • Rationale:

      The lower extremities contain skeletal, not smooth, muscles.

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. These muscles include cardiac, skeletal, and smooth muscles. Most smooth muscles are not voluntarily controlled because they are found in visceral organs, including the urinary bladder.

Test Taking Tip

Consider the three types of muscle tissue in the body to answer this question correctly.

Video Rationale