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Hydrochloric acid (HCI) is secreted from?

A.

chief

B.

parietal

C.

mucous

D.

regenerative (stem)

Answer and Explanation

The Correct Answer is B

A. Chief cells secrete pepsinogen, not HCl.

B. Parietal cells in the stomach lining are responsible for secreting hydrochloric acid (HCl). This acid is crucial for digestion and killing pathogens.

C. Mucous cells secrete mucus, which protects the stomach lining from the acidic environment. They do not secrete HCl.

D. Regenerative (stem) cells are involved in the renewal of the stomach lining, but they do not secrete HCl.


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Related Questions

Correct Answer is D

Explanation

A. Estrogen is a hormone involved in the regulation of the menstrual cycle and pregnancy, but it is not the hormone detected by pregnancy tests.

B. Luteinizing hormone (LH) surges just before ovulation but is not the hormone detected by pregnancy tests.

C. Progesterone supports pregnancy by maintaining the uterine lining, but it is not the hormone detected by pregnancy tests.

D. Human chorionic gonadotropin (hCG) is the hormone produced by the placenta shortly after implantation, and it is the hormone detected by pregnancy tests.

Correct Answer is B

Explanation

A. During pubarche: Pubarche refers to the onset of puberty, but oogenesis (the formation of oocytes) begins much earlier, during embryonic development.

B. During embryonic development: Oogenesis begins during embryonic development when the female fetus's ovaries form and start producing primary oocytes. These oocytes remain in a suspended state until puberty.

C. During thelarche: Thelarche is the onset of breast development during puberty, but oogenesis starts long before this, during embryonic development.

D. At birth: While primary oocytes are present at birth, the process of oogenesis actually begins during embryonic development, not at birth.

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