Which of the following statements explains the difference in thickness between the right and left ventricle myocardium?
The right ventricle chamber has a smaller overall capacity than the left ventricle
The right ventricle receives blood from right atrium, which has lower pressure than left atrium.
The right ventricle pumps a smaller blood volume than the left ventricle.
The right ventricle pumps blood into pulmonary circulation, which has lower resistance than systemic circulation
The Correct Answer is C
a. The right ventricle chamber has a smaller overall capacity than the left ventricle: While true, this doesn't directly explain the difference in muscle thickness.
b. The right ventricle receives blood from right atrium, which has lower pressure than left atrium: Both ventricles receive blood from low-pressure atria. The pressure difference is between the circulation systems they pump blood into.
c. The right ventricle pumps a smaller blood volume than the left ventricle. The right ventricle pumps blood to the lungs, a low-pressure system. Therefore, the right ventricle wall (myocardium) is thinner than the left ventricle wall. The left ventricle pumps blood against the higher resistance of the systemic circulation, so its wall is much thicker and stronger.
d. The right ventricle pumps blood into pulmonary circulation, which has lower resistance than systemic circulation: This is the core reason for the difference in muscle thickness.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
a. Sebaceous: Sebaceous glands are located near hair follicles and produce sebum, an oily substance that lubricates the hair and skin, preventing dryness and keeping it supple.
b. Eccrine: Eccrine glands are sweat glands located throughout the skin and help regulate body temperature through sweating.
c. Ceruminous: Ceruminous glands are located in the ear canal and produce cerumen (earwax) which protects the inner ear from dust, debris, and insects.
d. Apocrine: Apocrine glands are sweat glands located in areas like the armpits and groin. They produce a thicker sweat that takes on an odor when broken down by bacteria.
Correct Answer is D
Explanation
a: Contracts and brings about movement - This describes the function of muscle tissue, not connective tissue.
b: Generates and transmits impulses - This describes the function of nervous tissue, not connective tissue.
c: Covers and lines body surfaces - This describes the function of epithelial tissue, not connective tissue
d. Binds tissue together and supports structures: Connective tissue serves to bind, support, and protect other tissues and organs of the body. It also plays a role in insulation, storing energy, and transporting substances.
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