Which of the following occurs during the expiratory phase of respiration?
The diaphragm relaxes.
Oxygen is taken into the lungs.
The diaphragm contracts.
Oxygen is released from the lungs.
The Correct Answer is A
A. During the expiratory phase of respiration, the diaphragm relaxes and moves upward, causing the chest cavity to decrease in size and forcing air out of the lungs. This is a key part of the breathing process.
B. Oxygen is not taken into the lungs during expiration. Instead, expiration is the process of expelling carbon dioxide from the lungs after oxygen has been absorbed during inspiration.
C. The diaphragm contracts during the inspiratory phase to increase the volume of the lungs and draw air in, not during expiration.
D. Oxygen is not released from the lungs during expiration; rather, carbon dioxide is expelled from the lungs as a waste product of metabolism.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Type AB positive blood is the universal recipient because individuals with this blood type can receive blood from all other blood types (A, B, AB, and O) due to the presence of both A and B antigens on their red blood cells, and the Rh factor being positive allows them to accept Rh-positive or Rh-negative blood.
B. Type O negative blood is the universal donor, not the recipient. It can be given to any patient, but those with O negative blood can only receive from other O negative donors.
C. Type B negative can only receive blood from B negative or O negative blood types, limiting its compatibility with other blood types.
D. Type A positive individuals can receive blood from type A, type O, type B, and AB, but not as universally as AB positive, which is the universal recipient.
Correct Answer is D
Explanation
A. The stomach plays a key role in digestion by breaking down food mechanically and chemically but does not play a significant role in nutrient absorption.
B. The large intestine is primarily involved in water and electrolyte absorption, as well as the formation of feces. It does not significantly contribute to nutrient absorption.
C. While some digestion begins in the mouth, particularly with enzymes in saliva, nutrient absorption does not occur there.
D. The small intestine is the primary site of nutrient absorption in the digestive system. Its walls are lined with villi and microvilli that increase surface area for the absorption of nutrients such as carbohydrates, proteins, fats, vitamins, and minerals.
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