Question 1

Which hormone is primarily responsible for regulating the sleep-wake cycle, and which gland produces it?

Accepted Answer

Melatonin produced by the pineal gland

Question 2

A patient presents with abnormally high blood calcium levels. Which hormone is most likely under-secreted, and from which gland?

Accepted Answer

Calcitonin from the thyroid gland

Question 3

Which of the following best describes the function of ACTH (Adrenocorticotropic hormone)?

Accepted Answer

Stimulates the adrenal cortex to release cortisol

Question 4

A patient with diabetes insipidus is most likely experiencing a deficiency in which hormone, and what is its primary function?

Accepted Answer

ADH (antidiuretic hormone); promotes water reabsorption in kidneys

Question 5

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 6

A patient is experiencing muscle weakness and fatigue. Blood tests reveal low sodium and high potassium levels. Which hormone imbalance is most likely responsible?

Accepted Answer

Deficient aldosterone

Question 7

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

Accepted Answer

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

Question 8

Which hormone is released by the posterior pituitary and is essential for uterine contractions during childbirth?

Accepted Answer

Oxytocin

Question 9

A patient with hyperthyroidism is likely to have elevated levels of which hormone, and what is a common symptom?

Accepted Answer

Thyroxine; increased metabolic rate

Question 10

Which of the following best describes the function of the P wave in an electrocardiogram (ECG)?

Accepted Answer

Represents atrial depolarization

Question 11

Which of the following arteries supplies blood to the brain?

Accepted Answer

Internal carotid artery

Question 12

A patient is unable to produce insulin. Which organ is most likely affected, and what is the primary function of insulin?

Accepted Answer

Pancreas; lowers blood glucose levels

Question 13

Which hormone is responsible for stimulating the release of eggs from the ovaries and sperm production in the testes?

Accepted Answer

FSH (Follicle Stimulating Hormone)

Question 14

Which of the following is a function of the lymphatic system?

Accepted Answer

Returns excess tissue fluid to the bloodstream

Question 15

Which of the following best describes the role of the hypothalamus in hormone regulation?

Accepted Answer

It produces releasing and inhibiting hormones that control the anterior pituitary

Question 16

Which equation correctly represents the calculation of mean arterial pressure ($$MAP) $$using systolic ($$SBP) $$and diastolic ($$DBP) $$blood pressure?

Accepted Answer

$$MAP = DBP + \frac{1}{3}(SBP - DBP)$$

Question 17

Which of the following white blood cells is primarily responsible for fighting bacterial infections?

Accepted Answer

Neutrophils

Question 18

A patient is experiencing rapid heart rate and high blood pressure after a stressful event. Which hormone is most likely elevated?

Accepted Answer

Epinephrine

Question 19

Which of the following best describes the function of valves in veins?

Accepted Answer

Prevent backflow of blood

Question 20

Which hormone is released in response to low blood glucose levels and acts to increase blood sugar?

Accepted Answer

Glucagon

Endocrine, Cardiovascular, and Nervous Systems: Study Guide for Anatomy & Physiology

Study Guide - Practice Questions

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