Question 1

Which of the following best describes the function of antidiuretic hormone (ADH) in the human body?

Accepted Answer

ADH promotes water reabsorption in the kidneys, reducing urine output.

Question 2

A patient presents with excessive thirst and frequent urination. Laboratory tests reveal low levels of ADH. Which condition is most likely responsible for these symptoms?

Accepted Answer

Diabetes insipidus

Question 3

Which of the following is the correct sequence of the flow of blood through the heart, starting from the right atrium?

Accepted Answer

Right atrium → Right ventricle → Pulmonary artery → Lungs → Left atrium → Left ventricle → Aorta

Question 4

Which hormone is primarily responsible for stimulating ovulation in females and testosterone production in males?

Accepted Answer

Luteinizing hormone (LH)

Question 5

A patient has a deficiency in the hormone produced by the adrenal cortex that regulates sodium and potassium balance. Which hormone is deficient?

Accepted Answer

Aldosterone

Question 6

Which of the following best describes the role of photoreceptors in the retina?

Accepted Answer

They convert light energy into electrical signals.

Question 7

Which of the following equations correctly represents cardiac output ($CO$) in terms of heart rate ($HR$) and stroke volume ($SV$)?

Accepted Answer

$CO = HR 	imes SV$

Question 8

A patient’s blood test shows a high percentage of basophils. Which condition is most likely indicated by this finding?

Accepted Answer

Allergic reaction

Question 9

Which of the following structures is responsible for detecting rotational movements of the head?

Accepted Answer

Semicircular canals

Question 10

Which hormone is released by the hypothalamus to stimulate the anterior pituitary to secrete thyroid-stimulating hormone (TSH)?

Accepted Answer

Thyrotropin-releasing hormone (TRH)

Question 11

Which of the following best describes the function of the cribriform plate of the ethmoid bone?

Accepted Answer

It allows passage of olfactory nerve fibers from the nasal cavity to the brain.

Question 12

Which of the following is a correct definition of antagonists in muscle physiology?

Accepted Answer

Muscles that oppose the action of another muscle.

Question 13

Which of the following is the primary function of fibrinogen in the blood?

Accepted Answer

Forming blood clots by converting to fibrin

Question 14

Which of the following best describes the role of the SA node in the heart?

Accepted Answer

It initiates electrical impulses that set the pace for the heart rate.

Question 15

Which of the following is a function of the hypothalamus?

Accepted Answer

Control of hormone release from the pituitary gland

Question 16

Which of the following best describes the function of taste buds?

Accepted Answer

They detect chemical substances dissolved in saliva and send signals to the brain.

Question 17

Which of the following equations correctly represents the oxygen-carrying capacity of hemoglobin ($O_2$ capacity) in terms of hemoglobin concentration ($[Hb]$) and the amount of oxygen bound per gram of hemoglobin ($O_2$/g)?

Accepted Answer

$O_2 	ext{ capacity} = [Hb] 	imes (O_2/	ext{g})$

Question 18

Which of the following is the main function of the pericardial sac?

Accepted Answer

To protect and anchor the heart within the thoracic cavity.

Question 19

Which of the following hormones is responsible for stimulating the release of milk from the mammary glands during breastfeeding?

Accepted Answer

Oxytocin

Study Guide: Special Senses, Endocrine System, Blood, and Heart (Chapters 17–20)

Study Guide - Practice Questions

Study Guide - Flashcards