All the following statements about seminal vesicles are true EXCEPT:
First, the core concept here is the anatomy and function of the seminal vesicles. They're part of the male reproductive system, located posterior to the bladder. Their main functions include producing a significant portion of the seminal fluid, which contains fructose as an energy source for sperm. They also secrete prostaglandins and other substances that help with sperm motility and the coagulation of semen after ejaculation.
Now, the correct answer in the example was option C. Let me think why. If the options include something like "They produce testosterone," that would be incorrect because testosterone is produced by the Leydig cells in the testes. Another possible wrong option could be about the location, like saying they're in the scrotum, which is wrong because they're retroperitoneal. Another might be about their contribution to semen, maybe stating they contribute less than 50%, but actually they contribute about 60-70%, so that would be incorrect. Also, if an option says they store sperm, that's wrong because the epididymis stores sperm, not the seminal vesicles.
For the clinical pearl, it's important to remember that infections of the seminal vesicles can cause pain in the lower abdomen or back, and they can be part of prostatitis presentations. Also, during a digital rectal exam, the seminal vesicles can be palpated, and any abnormalities there might indicate issues like tumors or inflammation.
Putting this all together, the false statement would be the one that incorrectly attributes a function or location to the seminal vesicles. Since the correct answer in the example was C, I need to make sure that the explanation clearly identifies why the other options are correct and the chosen one is wrong. The user might have had an option C that incorrectly states a function or location, which is why it's the exception.
**Core Concept**
Seminal vesicles are paired, retroperitoneal glands posterior to the bladder that contribute 60–70% of seminal fluid volume. They secrete fructose, prostaglandins, and clotting factors essential for sperm viability and semen coagulation.
**Why the Correct Answer is Right**
If the false statement claims seminal vesicles "produce testosterone," this is incorrect. Testosterone is synthesized by Leydig cells in the testes, not seminal vesicles. Seminal vesicles lack steroidogenic enzymes like 17α-hydroxylase, which are critical for testosterone biosynthesis.
**Why Each Wrong Option is Incorrect**
**Option A:** If stating "secretes fructose," it is correct. Fructose provides metabolic energy for sperm motility.
**Option B:** If stating "located posterior to the bladder," it is correct. Anatomically, they lie between the bladder and rectum.
**Option D:** If stating "contributes to semen coagulation," it is correct. Their secretion includes fibrinogen and proteases that cause seminal fluid to coagulate post-ejaculation.
**Clinical Pearl / High-Yield Fact**
Remember: **"Seminal vesicle secretions are sweet but silent on steroids."** They