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In ovulation, after expelling the oocyte the follicle becomes ____________which produces_____________.

A.

corpus luteum; FSH and LH

B.

corpus albicans; progesterone

C.

corpus albicans; estrogen and progesterone

D.

corpus luteum; estrogen and progesterone

Answer and Explanation

The Correct Answer is D

A. Corpus luteum; FSH and LH: The follicle transforms into the corpus luteum after ovulation, which secretes hormones. However, FSH and LH are hormones secreted by the pituitary gland, not products of the corpus luteum. 

 

B. Corpus albicans; progesterone: The corpus albicans is a degenerated form of the corpus luteum and is not responsible for secreting progesterone.

 

C. Corpus albicans; estrogen and progesterone: The corpus albicans forms after the corpus luteum degenerates and does not produce significant levels of estrogen and progesterone. 

 

D. Corpus luteum; estrogen and progesterone: After ovulation, the follicle transforms into the corpus luteum, which secretes estrogen and progesterone to support the early stages of pregnancy or regulate the menstrual cycle if pregnancy does not occur.
 


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View Related questions

Correct Answer is C

Explanation

A. Posterior pituitary releases hormones such as ADH (antidiuretic hormone), but it does not have aldosterone receptors.

B. Proximal convoluted tubule is involved in reabsorption, but it does not have aldosterone receptors.

C. Distal convoluted tubule: Aldosterone receptors are found in the cells of the distal convoluted tubule. Aldosterone increases sodium reabsorption and potassium excretion in this part of the nephron, which helps regulate blood pressure and electrolyte balance.

D. Adrenal medulla produces catecholamines (e.g., adrenaline) but does not contain aldosterone receptors.

Correct Answer is B

Explanation

A. Surfactant reduces surface tension in the alveoli, aiding in lung expansion, but it does not directly stimulate breathing.

B. CO2 accumulating in the infant's blood: The accumulation of CO2 in the infant's blood is a significant stimulus for the first breath after birth. High levels of CO2 trigger the infant's respiratory centers to start breathing.

C. Prostaglandins are involved in labor and delivery but do not directly stimulate breathing in the newborn.

D. An increased O2 level in the infant's new environment: Increased O2 levels do not directly stimulate breathing; rather, the accumulation of CO2 is the primary stimulus.

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