Sometimes People Find Themselves Unable to Move Their Postural Muscles

question 112

Multiple Choice

 Sometimes people find themselves unable to move their postural muscles immediately after awakening. Why?

• A) Blood pressure is too low.
• B) The motor nerves are inactive until body temperature reaches its normal level.
• C) An increase in light striking the eyes reflexively inhibits the motor neurons.
• D) Part of the brain is still asleep.

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Definitions:

Red Blood Cells

The cells in the blood responsible for carrying oxygen from the lungs to the body tissues and carbon dioxide back to the lungs.

Hemoglobin

A protein in red blood cells responsible for transporting oxygen from the lungs to the body's organs and tissues and bringing back carbon dioxide from them for expulsion.

Single Circuit

Refers to a type of blood circulation system where the blood passes through the heart once in a complete circuit of the body, typical of fish.

Circulatory System

The system comprising the heart, blood vessels, and blood, responsible for transporting nutrients, oxygen, and waste products throughout the body.