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 B
Explanation
A. Terminal sulcus: This is a V-shaped groove on the tongue that marks the division between the anterior and posterior tongue-not related to tongue mobility.
B. Lingual frenulum: This is a fold of mucous membrane under the tongue that may be too short or tight in some children (ankyloglossia or “tongue-tie”), limiting movement. Surgery may involve cutting this to free the tongue.
C. Uvula: The uvula is part of the soft palate and plays a role in speech and swallowing, not tongue movement.
D. Palatine tonsils: These are lymphatic tissues in the oropharynx and have no role in tongue movement.
Correct Answer is C
Explanation
A. Because it saves one step in its synthesis: Zymogen secretion is about preventing premature activation, not simplifying synthesis.
B. So it will start digesting intracellular proteins of the chief cells more quickly: This would be harmful-zymogens prevent self-digestion of the cells that produce them.
C. So it acts only in the stomach lumen and does not digest intracellular proteins: Pepsin is secreted as inactive pepsinogen to prevent it from digesting the proteins inside chief cells. It is only activated to pepsin in the acidic environment of the stomach lumen.
D. So it can start digesting dietary proteins more quickly: Speed is not the reason for secreting it as a zymogen-safety is.
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