Question

Pineal body develops from:
A. Dorsal part of the diencephalon.
B. Ventral part of the diencephalon.
C. Ventral side of cerebellum.
D. Lateral side of cerebellum.

Answer 1

Hint: The diencephalon is the embryonic vertebrate neural tube area that gives rise to anterior forebrain structures such as the thalamus, hypothalamus, posterior pituitary gland, and pineal gland. The pineal gland is a small, rounded, reddish-brown gland located on the dorsal side of the forebrain. Melatonin and serotonin hormones are secreted by this gland.

Complete Step by Step Answer:
The pineal gland, also known as the conarium, epiphysis cerebri, pineal organ, or pineal body, is a vertebrate endocrine gland that produces melatonin, a hormone derived from tryptophan that plays a vital role in the regulation of circadian rhythms (the approximately 24-hour cycle of biological activities connected with natural periods of light and darkness). The pineal gland grows from the roof of the diencephalon, a section of the brain, and is situated in the brain midline behind the 3rd cerebral ventricle (between the two cerebral hemispheres). It gets its name from its shape, which resembles a pine cone (Latin pinea). It is about 0.8 cm (0.3 inch) long and weighs about 0.1 gramme in adults (0.004 ounce).

The correct option is A.

Note: The cerebellum (Latin for "little brain") is a significant hindbrain structure located close to the brainstem. This area of the brain is in charge of a variety of functions, including motor skills like balance, coordination, and posture.