Question 1

Which hormone is released by the thyroid gland and is primarily responsible for regulating metabolic rate in the body?

Accepted Answer

Thyroxine (T4)

Question 2

A patient presents with low blood calcium levels. Which gland is most likely underactive, and what hormone is deficient?

Accepted Answer

Parathyroid gland; parathyroid hormone (PTH)

Question 3

Which of the following best describes the function of the adrenal cortex?

Accepted Answer

Releases hormones that regulate metabolism and stress response

Question 4

During inhalation, which pressure change occurs in the thoracic cavity to allow air to enter the lungs?

Accepted Answer

Alveolar pressure drops below atmospheric pressure

Question 5

Which equation correctly represents the relationship described by Henry’s Law in respiratory physiology?

Accepted Answer

$C = kP$

Question 6

A person is hyperventilating. What effect does this have on blood pH, and why?

Accepted Answer

Blood pH increases due to excessive loss of CO$_2$

Question 7

Which layer of the gastrointestinal tract is primarily responsible for peristalsis?

Accepted Answer

Muscularis externa

Question 8

Which of the following is a correct summary of the products generated from one glucose molecule during cellular respiration?

Accepted Answer

$36$ ATP, $6$ CO$_2$, $6$ H$_2$O

Question 9

Which process describes the conversion of non-carbohydrate sources into glucose?

Accepted Answer

Gluconeogenesis

Question 10

A patient with chronic kidney disease has difficulty excreting hydrogen ions. What is the likely consequence for their blood pH?

Accepted Answer

Blood pH will decrease, leading to acidosis

Question 11

Which of the following best describes the role of bile in digestion?

Accepted Answer

Bile emulsifies fats in the small intestine

Question 12

Which formula correctly represents the partial pressure of a gas in a mixture according to Dalton’s Law?

Accepted Answer

$P_{total} = P_1 + P_2 + P_3 + \ldots$

Question 13

Which of the following is NOT a function of the pancreas?

Accepted Answer

Production of bile

Question 14

During protein catabolism, which process removes the amino group from amino acids?

Accepted Answer

Deamination

Question 15

Which step in carbohydrate metabolism produces the most ATP per glucose molecule?

Accepted Answer

Electron Transport Chain (ETC)

Question 16

A patient is unable to absorb vitamin B$_{12}$ due to a lack of intrinsic factor. Which organ is most likely affected?

Accepted Answer

Stomach

Question 17

Which of the following best explains why oxygen diffuses from alveoli into pulmonary capillaries?

Accepted Answer

Partial pressure of oxygen is higher in the alveoli than in the capillaries

Question 18

Which hormone stimulates the release of cortisol from the adrenal cortex?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 19

Which process is responsible for the movement of food through the digestive tract via coordinated muscle contractions?

Accepted Answer

Peristalsis

Question 20

Which of the following is a correct description of transamination in protein metabolism?

Accepted Answer

Transfer of an amino group from one amino acid to a keto acid

Comprehensive Study Guide: Endocrine, Respiratory, Digestive, and Metabolic Systems

Study Guide - Practice Questions