Question

Vomit centre is located in ____________
a. Cerebrum
b. Medulla
c. Diencephalon
d. Pons

Answer 1

Hint: Medulla oblongata is a long stem like structure which is a component of the brainstem. It is located in anterior and partially inferior to the cerebellum of the brain.

Complete answer:
> Cerebrum is the largest part of the brain which consists of the cerebral cortex along with subcortical structures which includes the hippocampus, basal ganglia and olfactory bulb. Cerebrum is the uppermost part of the brain in the region of the central nervous system. The main functions of cerebrum are sensory processing, olfaction, language and communication, learning and memory.

> Medulla oblongata or medulla is a cone-shaped mass which is responsible for autonomic functions such as vomiting and sneezing. The medulla of the brain contains cardiac, respiratory, vomiting and vasomotor centres and deals with other automatic functions like breathing, heart rate and blood pressure.

> Diencephalon is the part of the forebrain and is located between the midbrain and the telencephalon. It consists of various structures such as thalamus, epithalamus, hypothalamus and subthalamus. The thalamus serves as a relay centre for sensory and motor impulses.

> Pons is the part of brainstem and lies inferior to the midbrain, anterior to the cerebellum and superior to the medulla oblongata. It consists of four cranial nerves which helps in regulation of respiration, controls involuntary actions, maintain equilibrium, sensor roles in hearing, taste, facial expressions, etc.

Hence, the correct answer is option (B).

Note: Medulla oblongata connects the higher level of the brain to the spinal cord and is responsible for performing various functions of the autonomic nervous system as cardiovascular center, vasomotor center, reflex center and controls ventilation in respiration process.