An Instructor Explains That When Fresh Oxygen Enters the Bloodstream

question 17

Multiple Choice

An instructor explains that when fresh oxygen enters the bloodstream, it is carried by the hemoglobin on the red blood cells through the arteries and arterioles to the capillaries. A student recognizes that this process that occurs between the bloodstream and the body cells is called

• A) Internal respiration.
• B) Diffusion.
• C) External respiration.
• D) Expiration.

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Definitions:

Subarachnoid Space

The area between the arachnoid mater and pia mater surrounding the brain and spinal cord, filled with cerebrospinal fluid.

Meninges

The protective membranes covering the brain and spinal cord, divided into three layers: dura mater, arachnoid mater, and pia mater.

Flexor Muscles

Muscles that decrease the angle between the bones of a joint, allowing bending, typically found in the limbs.

Pronator Muscles

Muscles located in the forearm that are responsible for pronating the forearm, turning the hand so the palm faces downwards.