Question 1

A patient presents with hyperglycemia, frequent urination, and unexplained weight loss. Laboratory tests reveal low insulin levels. Which endocrine disorder is most likely responsible for these symptoms?

Accepted Answer

Diabetes mellitus

Question 2

Which hormone is primarily responsible for stimulating gluconeogenesis in the liver during periods of fasting?

Accepted Answer

Cortisol

Question 3

A researcher is studying the hypophyseal portal system. Which of the following best describes its function?

Accepted Answer

It transports hormones from the hypothalamus directly to the anterior pituitary.

Question 4

Which of the following best describes the difference between hormonal, neural, and humoral stimuli in hormone production?

Accepted Answer

Hormonal stimuli involve hormones from other glands, neural stimuli involve nerve impulses, and humoral stimuli involve changes in blood levels of ions or nutrients.

Question 5

A patient with Graves' disease is likely to exhibit which of the following symptoms due to excessive thyroid hormone production?

Accepted Answer

Tachycardia and weight loss

Question 6

Which of the following blood components is primarily responsible for maintaining osmotic pressure and transporting substances such as hormones and drugs?

Accepted Answer

Albumin

Question 7

A blood sample agglutinates with anti-A and anti-B sera but not with anti-D (Rh) serum. What is the blood type of this individual?

Accepted Answer

Type AB-

Question 8

Which of the following best describes the role of hemoglobin in oxygen transport?

Accepted Answer

Hemoglobin within red blood cells binds oxygen in the lungs and releases it in tissues where oxygen concentration is low.

Question 9

A patient is diagnosed with leukemia. Which of the following best describes this condition?

Accepted Answer

A cancer of white blood cells leading to uncontrolled proliferation

Question 10

Which of the following events on an electrocardiogram (EKG) corresponds to ventricular depolarization?

Accepted Answer

QRS complex

Question 11

Which heart valve prevents backflow of blood from the left ventricle to the left atrium?

Accepted Answer

Mitral (bicuspid) valve

Question 12

Which of the following correctly traces the pathway of blood from the right atrium to the aorta?

Accepted Answer

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

Question 13

Which blood vessel type has the greatest resistance to blood flow and is most responsible for regulating blood pressure?

Accepted Answer

Arterioles

Question 14

Which of the following best describes the pathway of lymph from peripheral tissues back to the bloodstream?

Accepted Answer

Lymphatic capillaries → Lymphatic vessels → Lymph nodes → Lymphatic trunks → Lymphatic ducts → Subclavian veins

Question 15

Which of the following is a primary lymphoid organ?

Accepted Answer

Thymus

Question 16

Which of the following best defines mucosa-associated lymphoid tissue (MALT)?

Accepted Answer

Lymphoid tissue associated with mucous membranes in the digestive, respiratory, and genitourinary tracts

Question 17

Which of the following is NOT a cellular component of innate immunity?

Accepted Answer

B lymphocytes

Question 18

A child receives a vaccine and later develops immunity to the disease. Which type of immunity is this?

Accepted Answer

Active, artificially acquired immunity

Question 19

Which of the following best describes the classical pathway of complement activation?

Accepted Answer

It is triggered by the binding of antibodies to antigens.

Question 20

During lymphocyte maturation, what is the purpose of negative selection?

Accepted Answer

To eliminate lymphocytes that strongly bind to self-antigens

AP217 Exam 1 Study Guidance: Endocrine, Blood, Heart, Blood Vessels, Lymphatic, and Immune System

Study Guide - Practice Questions

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