The protein-digesting enzyme in the small intestine that is activated by enterokinase is:
A. Amylase
B. Pepsin
C. Trypsin
D. Rennin
Answer: Option C
Solution (By JKSSB Mock Tests)
Trypsinogen, secreted by the pancreas, is activated to trypsin by enterokinase (intestinal enzyme). Trypsin then activates other zymogens. Pepsin is active in the stomach, rennin in infants, amylase digests starch. This cascade prevents premature protein digestion in the pancreas.
Explanation:
Relaxin, produced by the corpus luteum and placenta, softens and relaxes the pelvic ligaments and pubic symphysis to facilitate childbirth. Oxytocin stimulates contractions.
Explanation:
The colon (large intestine) primarily absorbs water, sodium, and some vitamins (produced by gut flora) from the indigestible food residue, converting it into semisolid feces. It does not secrete digestive enzymes; that is the small intestine's role. Protein digestion and amino acid absorption occur in the small intestine.
Explanation:
Glycogen is a highly branched polysaccharide of glucose, the storage form in animals, found mainly in the liver and skeletal muscles. Starch is the plant equivalent. Cellulose is structural in plants, sucrose is a disaccharide. Glycogen can be rapidly mobilized to maintain blood glucose.
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