Physiological Regulation And Metabolic Processes Practice Test Practice Tests

Question 1

Which of the following chemical equations represents the central reversible reaction in acid-base balance?

Accepted Answer

A. CO2 + H2O ↔ H2CO3 ↔ HCO3- + H+

Answer

B. NaCl ↔ Na+ + Cl-

Answer

C. H2SO4 ↔ 2H+ + SO42-

Answer

D. KOH ↔ K+ + OH-

Question 2

A patient presents with hypoventilation. Which type of pH disturbance is most likely?

Accepted Answer

B. Respiratory acidosis

Answer

A. Respiratory alkalosis

Answer

C. Metabolic acidosis

Answer

D. Metabolic alkalosis

Question 3

In response to metabolic acidosis, what respiratory compensation mechanism does the body employ?

Accepted Answer

A. Increasing ventilation to decrease PCO2 levels

Answer

B. Decreasing ventilation to increase PCO2 levels

Answer

C. Retaining bicarbonate in the kidneys

Answer

D. Excreting hydrogen ions in the kidneys

Question 4

Which specific cells in the kidneys are primarily responsible for secreting H+ ions into the tubular fluid?

Accepted Answer

Intercalated cells

Question 5

Excessive vomiting can lead to metabolic acidosis.

Accepted Answer

True

Answer

False

Question 6

Which of the following brainstem regions is primarily responsible for setting the basic rhythm of breathing?

Accepted Answer

C. Medulla oblongata

Answer

A. Pons

Answer

B. Cerebellum

Answer

D. Thalamus

Question 7

Which of the following factors stimulate ventilation by acting on chemoreceptors?

Answer

A. Increased PCO2

Answer

B. Decreased pH

Answer

C. Decreased PO2

Answer

D. Increased HCO3-

Question 8

The primary ventilatory response to chronic hypoxia at high altitude is a decrease in ventilation due to central chemoreceptor adaptation.

Accepted Answer

True

Answer

False

Question 9

Name two mechanisms by which the body loses heat to the environment.

Accepted Answer

Radiation, Evaporation

Question 10

Which of the following physiological responses helps to conserve heat in a cold environment?

Accepted Answer

B. Peripheral vasoconstriction

Answer

A. Sweating

Answer

C. Increased ventilation

Answer

D. Increased metabolic rate

Question 11

Within the thermoneutral zone, what is the primary way the body maintains a stable temperature?

Accepted Answer

A. By adjusting blood flow to the skin

Answer

B. By shivering

Answer

C. By sweating

Answer

D. By increasing metabolic rate

Question 12

Which of the following cell types is NOT found in the gastric glands of the stomach?

Accepted Answer

D. Goblet cells

Answer

A. Parietal cells

Answer

B. Chief cells

Answer

C. Mucous neck cells

Question 13

The myenteric plexus is located between the circular and longitudinal muscle layers of the muscularis externa and primarily controls gastrointestinal motility.

Accepted Answer

True

Answer

False

Question 14

Which hormone primarily stimulates gallbladder contraction and pancreatic enzyme secretion?

Accepted Answer

B. Cholecystokinin (CCK)

Answer

A. Gastrin

Answer

C. Secretin

Answer

D. Gastric Inhibitory Peptide (GIP)

Question 15

Name the primary mechanism by which monosaccharides are absorbed across the intestinal epithelium.

Accepted Answer

Secondary active transport

Question 16

Which of the following conditions is characterized by the destruction of parietal cells in the stomach, leading to vitamin B12 deficiency?

Accepted Answer

C. Pernicious anemia

Answer

A. Cystic fibrosis

Answer

B. Gastroparesis

Answer

D. Lactose intolerance

Question 17

Which of the following hormones or neuropeptides stimulate feeding behavior when released from the arcuate nucleus of the hypothalamus? (Select all that apply)

Answer

A. Neuropeptide Y (NPY)

Answer

B. Agouti-related peptide (AgRP)

Answer

C. Pro-opiomelanocortin (POMC)

Answer

D. Cocaine- and amphetamine-regulated transcript (CART)

Question 18

Glycogenesis is the breakdown of glycogen into glucose molecules.

Accepted Answer

False

Answer

True

Question 19

Which of the following methods directly measures the heat produced by the body to determine metabolic rate?

Accepted Answer

A. Calorimetry

Answer

B. Oxygen consumption

Answer

C. CO2 production

Answer

D. Indirect calorimetry

Question 20

State the key difference in the pathophysiology of Type I and Type II diabetes mellitus.

Accepted Answer

Type I diabetes involves autoimmune destruction of pancreatic beta cells, leading to insulin deficiency, while Type II diabetes involves insulin resistance and relative insulin deficiency.

Physiological Regulation And Metabolic Processes Practice Test Practice Tests

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Physiological Regulation and Metabolic Processes Practice Test

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