Which of the following is a characteristic of a phagocyte?
Clumping together and adhering to damaged tissues
Digesting foreign pathogens in damaged tissues
Entering damaged tissues and releasing histamine
Transporting oxygen from the lungs to damaged tissues
The Correct Answer is B
A. While phagocytes can move to areas of damage, their primary function is not to clump together and adhere to tissues, but rather to engulf and digest foreign materials.
B. Phagocytes, such as macrophages and neutrophils, are specialized white blood cells that ingest and digest foreign pathogens, dead cells, and debris within damaged tissues. This is their main characteristic and function.
C. The release of histamine is typically associated with mast cells, not phagocytes. Histamine helps to initiate inflammatory responses, but phagocytes are involved in engulfing pathogens rather than releasing histamine.
D. Transporting oxygen from the lungs to tissues is the role of red blood cells, not phagocytes. Phagocytes are involved in immune defense, not oxygen transport.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Dehydroepiandrosterone (DHEA) and estradiol are hormones related to sex and stress but are not primarily involved in the fight-or-flight response.
B. Epinephrine (adrenaline) and norepinephrine are the key hormones released by the adrenal medulla during the fight-or-flight response. These hormones increase heart rate, blood pressure, and energy supply to prepare the body for rapid action in stressful situations. This is the correct answer.
C. Ghrelin and kisspeptin are involved in hunger and reproductive functions, not the acute stress response.
D. Insulin and glucagon are involved in regulating blood sugar, but they are not the primary hormones released during the fight-or-flight response.
Correct Answer is D
Explanation
A. The production of breast milk is the function of the mammary glands, not the lacrimal gland.
B. The production of saliva is the function of the salivary glands, not the lacrimal gland.
C. The secretion of cerumen (earwax) is the function of the ceruminous glands, not the lacrimal gland.
D. The lacrimal glands are responsible for the secretion of tears, which help to lubricate and protect the surface of the eyes. This is the correct answer.
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