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Which one has the correct match. (i) C...

Which one has the correct match.
(i) Corpus luteum - progesterone - degeneration of endometrium
(ii) Pineal gland - vasopressin - intracellular transport
(iii) Pars nervosa - coherin - induces contraction of jejunum

A

I only

B

I and ii

C

iii only

D

ii and iii.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding which match is correct among the given options, let's analyze each statement step by step. ### Step 1: Analyze the first statement **Statement (i): Corpus luteum - progesterone - degeneration of endometrium** - The corpus luteum is a structure that forms in the ovary after ovulation. - It secretes the hormone progesterone. - **Function of progesterone:** It is primarily responsible for preparing the endometrium (the lining of the uterus) for a potential implantation of an embryo. - **Conclusion:** Progesterone promotes the maintenance and regeneration of the endometrium, not its degeneration. Thus, this statement is incorrect. ### Step 2: Analyze the second statement **Statement (ii): Pineal gland - vasopressin - intracellular transport** - The pineal gland is a small gland located in the brain. - It primarily secretes the hormone melatonin, which regulates sleep-wake cycles and the body's biological clock. - **Vasopressin (also known as antidiuretic hormone, ADH)** is secreted by the posterior pituitary gland, not the pineal gland. - **Conclusion:** This statement is also incorrect because it misattributes the secretion of vasopressin to the pineal gland and incorrectly describes its function. ### Step 3: Analyze the third statement **Statement (iii): Pars nervosa - coherin - induces contraction of jejunum** - The pars nervosa is part of the posterior pituitary gland. - It is known to secrete several hormones, but "coherin" is not a well-documented hormone in standard biology references. However, if we consider the context, it might refer to a hormone involved in gastrointestinal motility. - **Function:** The contraction of the jejunum (part of the small intestine) is indeed influenced by various hormones and neural signals. - **Conclusion:** While "coherin" is not a widely recognized term, if we assume it refers to a hormone that aids in contraction, this statement could be considered correct based on the context provided. ### Final Conclusion After analyzing all three statements: - Statement (i) is incorrect. - Statement (ii) is incorrect. - Statement (iii) is correct. Thus, the correct match is: **(iii) Pars nervosa - coherin - induces contraction of jejunum.** ### Answer: The answer to the question is that only the third statement is correct. ---
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