Why is pepsin is secreted as a zymogen?
because it saves one step in its synthesis
so it will start digesting intracellular proteins of the chief cells more quickly
so it acts only in the stomach lumen and does not digest intracellular proteins
so it can start digesting dietary proteins more quickly
The Correct Answer is C
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Arcuate a. → interlobar a. → afferent arteriole → cortical radiate (interlobular) a.: This is an incorrect sequence-interlobar arteries come before arcuate arteries.
B. Interlobar a. → cortical radiate (interlobular) a. → segmental a. → arcuate a.: Segmental arteries are more proximal, immediately after the renal artery.
C. Segmental a. → interlobar a. → arcuate a. → cortical radiate (interlobular) a.: This is the correct anatomical order of arterial blood flow: Renal a. → Segmental a. → Interlobar a. → Arcuate a. → Cortical radiate (interlobular) a. → Afferent arteriole
D. Afferent arteriole → cortical radiate (interlobular) a. → arcuate a. → interlobar a.: This is a reversed and incorrect sequence.
E. Segmental a. → arcuate a. → interlobar a. → cortical radiate (interlobular) a.: Arcuate arteries arise after interlobar arteries, not before.
Correct Answer is A
Explanation
A. Intrinsic factor: Intrinsic factor, secreted by parietal cells, is essential for vitamin B₁₂ absorption in the ileum. Vitamin B₁₂ is needed for RBC production and hemoglobin synthesis.
B. Gastric lipase: Gastric lipase breaks down lipids, not involved in hemoglobin production.
C. Pepsinogen: Pepsinogen is converted to pepsin, which digests proteins-not related to RBC or hemoglobin synthesis.
D. HCl: Hydrochloric acid helps activate enzymes and digest food, but does not directly influence hemoglobin production.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.