NEET · Biology · STD 12 - 2. human reproduction

Menstrual flow occurs due to lack of

A oxytocin
B vasopressin
C progesterone
D \(FSH\)

Verified Solution

Answer & Solution

Correct Answer

(C) progesterone

Step-by-step Solution

Detailed explanation

(c) : The corpus luteum secretes large amounts of progesterone which is essential for maintenance of the endometrium. Such as endometrium is necessary for implantation of the fertilized ovum and other events of pregnancy. In the absence of fertilization, the corpus luteum degenerates. This causes disintegration of the endometrium leading to menstruation. The menstrual flow results due to breakdown of endometrial lining of the uterus and its blood vessels which forms liquid that comes out through vagina.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match List-I with List-II.

List - I	List - II
A. Emphysema	(I) Rapid spasms in muscle due to low Ca⁺⁺ in body fluid
B. Angina pectoris	(II) Damaged alveolar walls and decreased respiratory surface
C. Glomerulonephritis	(III) Acute chest pain when not enough oxygen is reaching to heart muscle
D. Tetany	(IV) Inflammation of glomeruli of kidney

Choose the correct answer from the options given below :

NEET 2025 Medium

Match the Column \(- I\) with Column \(-II\)

Column \(-I\)	Column \(-II\)
\((a)\; P-\)wave	\((i)\) Depolarisation of ventricles
\((b)\; QRS\) complex	\((ii)\) Repolarisation of ventricles
\((c)\; T-\)wave	\((iii)\) Coronary ischemia
\((d)\) Reduction in the size of \(T-\)wave	\((iv)\) Depolarisation of atria
	\((v)\) Repolarisation of atria

Select the correct option \((a)\quad (b)\quad (c) \quad (d)\)

NEET 2019 Medium

Explore more questions on app

From NEET

Explore more questions on app

List I	List II
A. Molluscs	I. Pulmonary respiration only
B. Reptiles	II. Branchial respiration
C. Adult amphibians	III. Cellular respiration
D. Amoeba	IV. Pulmonary and Cutaneous respiration

List I (Placentation)	List II (Example)
A. Marginal	I. Mustard
B. Axile	II. Pea
C. Parietal	III. Marigold
D. Basal	IV. Lemon