Biology Test Biology Anatomy and Physiology 2

Question 1

Which type of muscle tissue is found in the walls of hollow organs such as the stomach and bladder?

Accepted Answer

Smooth muscle

Answer

Smooth muscle is involuntary and lines hollow organs, controlling movements like peristalsis and urination.

Question 2

What is the primary function of the lymphatic system?

Accepted Answer

Return interstitial fluid to the bloodstream

Answer

The lymphatic system collects excess interstitial fluid and returns it to venous circulation, also playing a key role in immunity.

Question 3

Which bone marking is a rounded projection that articulates with another bone, forming a joint?

Accepted Answer

Condyle

Answer

A condyle is a smooth, rounded articular surface at the end of a bone that forms part of a synovial joint.

Question 4

The sinoatrial (SA) node is located in which chamber of the heart?

Accepted Answer

Right atrium

Answer

The SA node, the heart's natural pacemaker, is embedded in the posterior wall of the right atrium near the opening of the superior vena cava.

Question 5

Which layer of the skin contains sweat glands, hair follicles, and blood vessels?

Accepted Answer

Dermis

Answer

The dermis is the thick middle layer of skin housing glands, follicles, sensory receptors, and vascular networks.

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