Biology Test Biology Human Anatomy & Physiology 2

Question 1

Which type of muscle tissue is characterized by involuntary control and intercalated discs?

Accepted Answer

Cardiac muscle

Answer

Cardiac muscle is involuntary, striated, and connected by intercalated discs that allow coordinated contractions.

Question 2

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

Accepted Answer

Right atrium

Answer

The SA node, the heart's primary pacemaker, is located in the wall of the right atrium.

Question 3

Which hormone is primarily responsible for regulating blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Answer

PTH stimulates osteoclasts to resorb bone, releasing calcium into the bloodstream to raise blood calcium levels.

Question 4

Which part of the nephron is primarily responsible for the reabsorption of glucose and amino acids?

Accepted Answer

Proximal convoluted tubule

Answer

The proximal convoluted tubule reabsorbs virtually all filtered glucose and amino acids via active transport.

Question 5

What is the name of the protective membrane that directly covers the surface of the lungs?

Accepted Answer

Visceral pleura

Answer

The visceral pleura is the inner layer of the pleural membrane that directly covers the lung surface.

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