If the diameter of the efferent arterioles leading away from the glomerulus increases (vasodilation), which of the following is NOT likely to occur?
Urine output will decrease.
Glomerular filtration rate will decrease.
Systemic blood pressure will decrease.
Net filtration pressure will decrease.
The Correct Answer is C
A. Urine output will decrease: Vasodilation of efferent arterioles lowers glomerular pressure, leading to a lower GFR and reduced urine output.
B. Glomerular filtration rate will decrease: A wider efferent arteriole reduces resistance, decreasing the pressure inside the glomerulus, hence lowering GFR.
C. Systemic blood pressure will decrease: Local vasodilation of the efferent arteriole does not significantly affect systemic blood pressure. Systemic pressure is influenced more by cardiac output and total peripheral resistance, not glomerular arteriole tone.
D. Net filtration pressure will decrease: Lower glomerular capillary pressure results in reduced net filtration pressure (NFP).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Lysozyme: Lysozyme is present in saliva and has antibacterial properties, breaking down bacterial cell walls.
B. Urea and uric acid: These waste products are found in saliva in small amounts.
C. Electrolytes: Saliva contains electrolytes such as sodium, potassium, and bicarbonate.
D. Protease: Proteases (like pepsin or trypsin) are not present in saliva; they are found in the stomach and small intestine.
Correct Answer is A
Explanation
True: When the ECF becomes hypertonic due to water loss (e.g., dehydration), water moves out of the cells into the ECF by osmosis, causing cellular shrinkage.
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