Which part of the brain controls breathing and heart rate? MCQ with Answer and Explanation

Which part of the brain controls breathing and heart rate?
A. Cerebrum
B. Hypothalamus
C. Medulla oblongata
D. Cerebellum
Answer: Option C
Solution (By JKExamLibrary)
The medulla oblongata contains vital reflex centers for respiration, cardiovascular function, and digestion. It is part of the brainstem.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1
The site of fertilization in the human female reproductive tract is usually the:
A. Ovary
B. Cervix
C. Uterus
D. Ampulla of the fallopian tube

Correct Answer: Option D


Explanation:
Fertilization typically occurs in the ampulla, the widest region of the fallopian tube, where the sperm meets the secondary oocyte. The zygote then travels to the uterus for implantation. The ovary releases the egg, the uterus supports embryo development, the cervix is the lower portion opening into the vagina.

This question belongs to: Science Biology
Question #2
The hormone that stimulates the Leydig cells to produce testosterone is:
A. LH
B. GnRH
C. Inhibin
D. FSH

Correct Answer: Option A


Explanation:
Luteinizing hormone (LH) binds to Leydig cells in the testes, stimulating them to produce and secrete testosterone. FSH stimulates Sertoli cells for spermatogenesis. GnRH from hypothalamus stimulates release of LH and FSH.

This question belongs to: Science Biology
Question #3
In biotechnology, 'Bt brinjal' is a genetically modified crop developed to provide resistance against:
A. Herbicides
B. Fungal infections
C. The fruit and shoot borer (Leucinodes orbonalis)
D. Viral diseases

Correct Answer: Option C


Explanation:
Bt brinjal is a transgenic eggplant (brinjal) developed by inserting the cry1Ac gene from the soil bacterium Bacillus thuringiensis (Bt). This gene codes for a crystal protein that is toxic to the larvae of the brinjal fruit and shoot borer (Leucinodes orbonalis), a major pest that causes significant yield loss. When the insect ingests the plant tissue, the alkaline gut activates the toxin, creating pores in the gut lining and killing the pest.

This question belongs to: Science Biology