Question 1

Which hormone is released by the posterior pituitary and is primarily responsible for water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 2

A patient presents with symptoms of hyperglycemia, polyuria, and polydipsia. Which endocrine gland is most likely malfunctioning, and what is the primary hormone involved?

Accepted Answer

Pancreas; insulin

Question 3

Which of the following best describes the mechanism by which steroid hormones exert their effects?

Accepted Answer

They enter the cell and bind to intracellular receptors, directly influencing gene transcription.

Question 4

During a blood transfusion, a patient with type O negative blood receives type A positive blood. What is the most likely outcome?

Accepted Answer

Hemolytic transfusion reaction due to anti-A antibodies attacking donor cells.

Question 5

Which layer of the adrenal gland produces mineralocorticoids, and what is the primary mineralocorticoid?

Accepted Answer

Zona glomerulosa; aldosterone

Question 6

Amino acid-based hormones typically exert their effects by:

Accepted Answer

Binding to cell surface receptors and activating second messenger pathways.

Question 7

Which of the following equations correctly relates stroke volume (SV), end-diastolic volume (EDV), and end-systolic volume (ESV)?

Accepted Answer

$$SV = EDV - ESV$$

Question 8

A patient with left-sided heart failure is most likely to experience which symptom?

Accepted Answer

Pulmonary congestion

Question 9

Which leukocyte is most abundant in the blood and is primarily responsible for phagocytosis of bacteria?

Accepted Answer

Neutrophil

Question 10

Which of the following best describes the physiological response to hypoxia?

Accepted Answer

Increased secretion of erythropoietin from the kidneys

Question 11

Which hormone is released in response to humoral stimuli, such as low blood calcium levels?

Accepted Answer

Parathyroid hormone (PTH)

Question 12

During the cardiac cycle, which phase corresponds to ventricular contraction and ejection of blood?

Accepted Answer

Systole

Question 13

Which of the following is a function of albumin in the blood?

Accepted Answer

Maintains osmotic pressure and transports substances

Question 14

Which step is NOT involved in the synthesis of thyroid hormone?

Accepted Answer

Fusion of vesicles with the plasma membrane

Question 15

A patient with a deficiency in clotting factors is most likely to have a problem with which step of hemostasis?

Accepted Answer

Coagulation

Question 16

Which equation correctly represents cardiac output (CO) in terms of heart rate (HR) and stroke volume (SV)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 17

Which of the following best describes the effect of sympathetic stimulation on the heart?

Accepted Answer

Increases heart rate and contractility

Question 18

Which scenario illustrates a positive feedback mechanism in hormonal control?

Accepted Answer

Release of oxytocin during childbirth, increasing uterine contractions

Question 19

Which of the following is a distinguishing visual characteristic of eosinophils?

Accepted Answer

Bilobed nucleus and red-staining granules

Question 20

A patient experiences mass hemorrhage. Which immediate physiological consequence is most likely?

Accepted Answer

Decreased cardiac output (CO)

Endocrine System, Blood, and Heart: Mini-Study Guide for Anatomy & Physiology

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