Test Prep Test Prep Certifications HESI-A2 Questions & Answers

• Question 21:

  Insulin is produced in the ____ and functions to ____.

  A. Langerhan cells; metabolize macronutrients and increase the amount of glucose in the blood

  B. pancreatic islets; metabolize macronutrients primarily through the absorption of glucose into the body's cells

  C. kidney; metabolize macronutrients primarily through the absorption of glucose into the body's cells

  D. beta cells; increase the blood flow throughout the body

  Correct Answer: B

• Question 22:

  What is the primary function of melatonin?

  A. To produce pigment for the skin.

  B. To regulate the fight or flight response.

  C. To regulate sleep/wake cycles.

  D. To stimulate protein synthesis.

  E. Initiates sperm and egg maturation.

  Correct Answer: C

• Question 23:

  What valve is responsible for preventing the backflow of blood from the right ventricle to the right atrium?

  A. Mitral valve

  B. Tricuspid valve

  C. Semilunar valve

  D. Aortic valve

  E. Pulmonary valve

  Correct Answer: B

• Question 24:

  Which muscle is responsible for the adduction of the shoulder?

  A. Biceps brachii

  B. Triceps brachii

  C. Latissimus dorsi

  D. Brachialis

  E. Trapezius

  Correct Answer: C

• Question 25:

  What is the functional unit of the nervous system, and what is its function?

  A. The functional unit is the dendrite, which relays electrical signals throughout the nervous system.

  B. The functional unit is the soma, which transmits electrical signals from sense organs, muscles, and glands.

  C. The functional unit is the neuron, which transmits electrical and chemical signals from sense organs, muscles, and glands.

  D. The functional unit is the neuron, which filters signals from the body, catalyzes action potentials, and insulates them from the surrounding environment.

  Correct Answer: C

• Question 26:

  A person with type B blood has ____.

  A. "B" antigens in their plasma

  B. "B" antigens on their red blood cells

  C. "A" antigens on their red blood cells

  D. no antigens

  Correct Answer: B

• Question 27:

  What is the body's earliest defense against invading bacteria?

  A. neutrophils

  B. skin

  C. T cells

  D. basophils

  Correct Answer: B

• Question 28:

  Which member of the endocrine system is often referred to as the "master gland" because of its influence on other glands within the endocrine system?

  A. thymus

  B. thyroid

  C. pituitary

  D. pineal

  Correct Answer: C

• Question 29:

  The adductor muscle serves to ____, whereas the abductor muscle serves to ____.

  A. pull a body part away from the body's midline; pull a body part toward the body's midline

  B. relax after contractions; contract after relaxations

  C. pull a body part toward the body's midline; pull a body part away from the body's midline

  D. contract after relaxations; relax after contractions

  Correct Answer: C

• Question 30:

  What is the name of the tube connecting the kidney to the bladder?

  A. urethra

  B. ureter

  C. loop of Henle

  D. collecting duct

  Correct Answer: B