Question 1

Which of the following is a primary endocrine organ?

Accepted Answer

Pancreas

Question 2

A patient is experiencing symptoms of excessive thirst and urination. Blood tests reveal low levels of antidiuretic hormone (ADH). Which gland is most likely malfunctioning?

Accepted Answer

Pituitary gland

Question 3

Which of the following best describes the difference between upregulation and downregulation of hormone receptors?

Accepted Answer

Upregulation increases the number of receptors, while downregulation decreases them.

Question 4

Which hormone is hydrophilic and acts via membrane-bound receptors?

Accepted Answer

Insulin

Question 5

A patient with chronic high blood pressure is found to have thickened left ventricular walls. Which part of the heart is directly affected by this condition?

Accepted Answer

Left ventricle

Question 6

Which of the following correctly describes the flow of blood in the pulmonary circuit?

Accepted Answer

Right ventricle → pulmonary artery → lungs → left atrium

Question 7

Which factor would most likely cause an increase in blood pressure according to the equation $$ P = CO 	imes TPR  ($$where $$ P  is $$pressure, $$ CO  is $$cardiac output, and $$ TPR  is $$total peripheral resistance)?

Accepted Answer

Increased total peripheral resistance

Question 8

Which of the following is NOT a formed element of blood?

Accepted Answer

Plasma protein

Question 9

Which plasma protein is primarily responsible for maintaining osmotic pressure in the blood?

Accepted Answer

Albumin

Question 10

A patient is diagnosed with anemia due to decreased erythropoiesis. Which organ is most responsible for producing erythropoietin to stimulate red blood cell formation?

Accepted Answer

Kidney

Question 11

Which type of blood vessel has the thickest tunica media and is most responsible for regulating blood pressure?

Accepted Answer

Artery

Question 12

Which of the following is a secondary endocrine organ?

Accepted Answer

Heart

Question 13

Which of the following scenarios best illustrates downregulation of hormone receptors?

Accepted Answer

A cell decreases its receptor number after prolonged exposure to high hormone levels.

Question 14

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

Accepted Answer

Right atrium → right ventricle → pulmonary artery → lungs → left atrium → left ventricle → aorta

Question 15

Which formed element of blood is primarily responsible for initiating clot formation?

Accepted Answer

Platelet

Question 16

Which of the following best describes the function of globulins in blood?

Accepted Answer

Act as antibodies and transport proteins

Question 17

During hemopoiesis, which cell type is the precursor to all formed elements of blood?

Accepted Answer

Hematopoietic stem cell

Question 18

Which blood vessel type is most abundant in tissue exchange and has only a single layer of endothelial cells?

Accepted Answer

Capillary

Question 19

A patient has a blockage in the pulmonary artery. Which of the following would most likely occur?

Accepted Answer

Decreased oxygenation of blood

Question 20

Which of the following is a correct application of Starling's law of the heart?

Accepted Answer

Increased venous return leads to increased stroke volume

Anatomy & Physiology: Endocrine, Cardiovascular, and Blood Systems Study Guide

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