PCT Anatomy and Physiology 3

Question 1

Which body system is responsible for producing hormones that regulate metabolism, growth, and reproduction?

Accepted Answer

Endocrine system

Answer

The endocrine system consists of glands that secrete hormones directly into the bloodstream to regulate body processes.

Question 2

The diaphragm is a dome-shaped muscle essential for:

Accepted Answer

Breathing

Answer

The diaphragm contracts and flattens during inhalation, creating negative pressure in the thoracic cavity that draws air into the lungs.

Question 3

Which type of blood vessel carries blood AWAY from the heart?

Accepted Answer

Arteries

Answer

Arteries carry blood away from the heart under high pressure, with thick muscular walls to withstand the force of cardiac contraction.

Question 4

The normal pH range for human blood is:

Accepted Answer

7.35-7.45

Answer

Blood pH is tightly regulated between 7.35 and 7.45, with values outside this range causing life-threatening acid-base imbalances.

Question 5

Peristalsis refers to:

Accepted Answer

Wave-like muscle contractions that move food through the digestive tract

Answer

Peristalsis is the rhythmic contraction and relaxation of smooth muscle that propels food through the entire gastrointestinal tract.

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