Anatomy & Physiology Nervous #20

Question

Which reflex remains active throughout the life of an individual?

Answers

  1. Sucking
    • Rationale:

      The sucking reflex is a primitive reflex; therefore, it does not remain throughout an individual’s lifetime.

  2. Rooting
    • Rationale:

      The rooting reflex is a primitive reflex; therefore, it does not remain throughout an individual’s lifetime.

  3. Blinking
    • Rationale:

      The blinking reflex remains through an individual’s lifetime. This reflex is a protective mechanism for the eye.

  4. Grasping
    • Rationale:

      The grasping reflex is a primitive reflex; therefore, it does not remain throughout an individual’s lifetime.

Overview

A reflex is a muscle reaction that occurs automatically in response to stimulation.

Explanation

Learning Outcomes

There are two types of reflexes. One type of reflex is a primitive reflex that is present at birth but disappears within the first months of life. Other reflexes are present at birth and remain active for the entire span of an individual life. The blinking reflex is an example of a reflex that remains throughout an individual’s lifetime.

Test Taking Tip

Ask yourself if each answer choice is a reflex that remains throughout life. The reflex that remains with an individual throughout the lifetime is the correct choice for this question.

Video Rationale