Question 1

Which hormone is produced by the adrenal cortex and is primarily responsible for regulating sodium and potassium balance in the body?

Accepted Answer

Aldosterone

Question 2

A patient presents with symptoms of hyperthyroidism. Which feedback loop is most likely disrupted in this condition?

Accepted Answer

Negative Feedback Loop

Question 3

Which layer of the heart is responsible for the contractile force that pumps blood throughout the body?

Accepted Answer

Myocardium

Question 4

A blood sample contains a high percentage of eosinophils. What is the most likely cause?

Accepted Answer

Parasitic infection or allergic reaction

Question 5

Which of the following is TRUE regarding the pulmonary arteries?

Accepted Answer

They carry deoxygenated blood from the right ventricle to the lungs

Question 6

Which structure is found in veins but NOT in arteries, and what is its function?

Accepted Answer

Valves; prevent backflow of blood

Question 7

A patient with type AB+ blood is considered a universal recipient. Which of the following explains why?

Accepted Answer

They have both A and B antigens and no anti-A or anti-B antibodies

Question 8

Which part of the ECG corresponds to ventricular depolarization?

Accepted Answer

QRS complex

Question 9

If a patient receives mismatched blood during a transfusion, what is the most likely immediate consequence?

Accepted Answer

Hemolytic reaction due to antibody-antigen incompatibility

Question 10

Which equation would you use to calculate cardiac output, and what does each variable represent?

Accepted Answer

$$CO = HR 	imes SV$$

Question 11

Which of the following is a function of the hypothalamus in the endocrine system?

Accepted Answer

Connects to the pituitary gland and regulates hormone release

Question 12

Which blood vessel carries oxygenated blood from the lungs to the heart?

Accepted Answer

Pulmonary vein

Question 13

A patient with Cushing's syndrome is likely to have elevated levels of which hormone?

Accepted Answer

Cortisol

Question 14

Which of the following is the correct pathway of blood through the heart, starting at the superior and inferior vena cava?

Accepted Answer

Right atrium → Right ventricle → Pulmonary trunk → Pulmonary veins → Left atrium → Left ventricle → Aorta

Question 15

Which pulse point is located on the lateral side of the wrist and is commonly used to measure heart rate?

Accepted Answer

Radial

Question 16

Which of the following is a characteristic of cardiac muscle tissue observed under histology?

Accepted Answer

Striations and intercalated discs

Question 17

Which of the following arteries is NOT part of the Circle of Willis?

Accepted Answer

Basilar artery

Question 18

A patient with Addison's disease is likely to have which abnormality?

Accepted Answer

Hyposecretion of adrenal cortex hormones

Question 19

Which of the following best describes the function of pancreatic islets?

Accepted Answer

Produce hormones such as insulin and glucagon

Question 20

Which formula would you use to calculate mean arterial pressure (MAP)?

Accepted Answer

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

Comprehensive Study Notes: Endocrine System, Blood, Heart, and Vascular Anatomy & Physiology

Study Guide - Practice Questions