what is the function of the respiratory system
Logo

Nursing Elites

HESI A2

HESI A2 Practice Test Anatomy and Physiology

1. What is the primary function of the respiratory system?

Correct answer: A

Rationale: The primary function of the respiratory system is to facilitate the exchange of oxygen and carbon dioxide between the air and the bloodstream. Oxygen is taken in during inhalation and transported to cells, while carbon dioxide is removed during exhalation as a waste product of cellular metabolism. Choices B, C, and D are incorrect as they do not reflect the primary function of the respiratory system. Regulating body temperature is mainly controlled by the thermoregulatory system, fighting infections is a function of the immune system, and producing energy is primarily done by the metabolic system.

2. Find x. 120:x = 40:0.5.

Correct answer: C

Rationale: To find x, set up the proportion and solve for x: 120/x = 40/0.5. Cross multiply to get 120 * 0.5 = 40x. This simplifies to 60 = 40x. Divide by 40 to isolate x, giving x = 60/40 = 1. Therefore, the correct answer is C, which is 1. Choice A (60) is incorrect because it does not match the correct calculation. Choice B (0) is incorrect as the calculation results in x = 1, not 0. Choice D (25) is incorrect as it does not match the correct calculation of x = 1.

3. Which type of blood cell is primarily responsible for fighting infections?

Correct answer: B

Rationale: White blood cells, also known as leukocytes, play a crucial role in the immune system by primarily combating infections. These cells can identify and destroy pathogens, such as bacteria and viruses, helping the body defend against illnesses and maintain overall health. Red blood cells are responsible for oxygen transport, platelets aid in blood clotting, and plasma carries various components throughout the circulatory system, but none of these functions involve fighting infections like white blood cells do.

4. Which type of blood vessel carries blood back to the heart?

Correct answer: C

Rationale: Veins are the blood vessels that carry deoxygenated blood back to the heart, except for the pulmonary veins which carry oxygenated blood from the lungs. Arteries carry oxygenated blood away from the heart. Capillaries facilitate the exchange of nutrients and gases between the blood and tissues but do not specifically carry blood back to the heart. Lymphatic vessels are part of the lymphatic system responsible for immune function and do not directly carry blood back to the heart. Therefore, the correct answer is veins.

5. The Ramifications of a course of treatment are that treatment's ______

Correct answer: B

Rationale: The correct answer is 'B: Consequences.' Ramifications refer to the consequences of a particular course of action or treatment. In this context, 'Effectiveness' (Choice A) is not the most appropriate term as ramifications are more about the results or outcomes beyond just effectiveness. 'Complications' (Choice C) are adverse effects or issues that arise, not necessarily the overall consequences. 'Outcomes' (Choice D) is close in meaning but not as synonymous with ramifications as 'Consequences' is.

Similar Questions

Convert 7/8 to a decimal.
The nurse asked the patient to choose the items from the menu that are his _____.
Which form of fermentation is used to produce beer?
Sally was able to eat 5/8 of her lunch. John ate 75% of his lunch. Who ate more of their meal?
Which statement is not listed as a detail within the passage?

Access More Features

HESI A2 Basic
$49/ 30 days

  • 3,000 Questions with answers
  • 30 days access

HESI A2 Premium
$99/ 90 days

  • Actual HESI A2 Questions
  • 3,000 questions with answers
  • 90 days access

Other Courses