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The

is not a portion of the urethra.
Answer and Explanation

The Correct Answer is {"dropdown-group-1":"B"}

A. External urethral orifice: This is the external opening of the urethra, and part of the urethral passageway.
B. Internal urethral sphincter: This is a muscular structure that regulates flow, but it is not a section of the urethral tube itself.
C. Prostatic urethra: This is the part of the male urethra that passes through the prostate gland.
D. Membranous urethra: This portion passes through the urogenital diaphragm in males.
E. Spongy urethra: The longest segment of the male urethra, it runs through the penile (spongy) tissue.


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Related Questions

Correct Answer is E

Explanation

A. 2 ATP: This is the ATP yield from glycolysis (net gain), not fatty acid oxidation.
B. 18 ATP: Too low for a 16-carbon fatty acid-this number is far below the actual ATP yield from fatty acid metabolism.
C. 36 ATP: This is the approximate ATP yield from glucose oxidation, not a 16-carbon fatty acid.
D. 38 ATP: Also close to glucose metabolism; still too low.
E. 129 ATP: Beta-oxidation of a 16-carbon fatty acid (e.g., palmitic acid) generates 129 ATP molecules, making it far more energy-dense than glucose.

Correct Answer is D

Explanation

A. Peptides: Peptides in the stomach stimulate G cells to release gastrin, which enhances gastric secretion.
B. Distention: Stretch receptors in the stomach wall respond to distention and activate gastric secretions via reflexes.
C. Low acidity: A rise in pH (low acidity) following food entry triggers gastrin release.
D. Carbohydrates: Carbohydrates do not significantly stimulate gastric secretions; proteins are the primary stimulus during the gastric phase.

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