NCBTMB Anatomy and Physiology 5

Question 1

Which of the following is a function of the spleen in the adult human body?

Accepted Answer

Filtration of blood and destruction of old red blood cells

Answer

The spleen filters blood, removes old or damaged red blood cells, stores platelets, and plays a role in immune surveillance.

Question 2

The brachial plexus originates from which spinal cord levels?

Accepted Answer

C5–T1

Answer

The brachial plexus arises from anterior rami of spinal nerves C5 through T1 and innervates the entire upper extremity.

Question 3

Which muscle is the primary flexor of the elbow and is innervated by the musculocutaneous nerve?

Accepted Answer

Biceps brachii

Answer

The biceps brachii is the primary elbow flexor, also supinating the forearm; it is innervated by the musculocutaneous nerve (C5–C6).

Question 4

In the digestive system, where does the majority of chemical digestion and nutrient absorption occur?

Accepted Answer

Small intestine

Answer

The small intestine, with its villi and microvilli, is the primary site of chemical digestion by enzymes and absorption of nutrients into the bloodstream.

Question 5

What is the name of the tough fibrous membrane that covers the outer surface of bone, excluding joint surfaces?

Accepted Answer

Periosteum

Answer

The periosteum is the dense fibrous connective tissue sheath covering the outer surface of bone and contains osteogenic cells essential for bone repair and growth.

NCBTMB Exam Practice Test

NCBTMB Exam Practice Test

NCBTMB Anatomy and Physiology 5