This Cone-Shaped Gland is Located in the Head and Is

Question

This cone-shaped gland is located in the head and is called the "biological clock."
A) Posterior pituitary
B) Hypothalamus
C) Pineal
D) Thymus

Accepted Answer

The pineal gland is a small, cone-shaped gland in the brain that produces the hormone melatonin, which helps regulate the sleep-wake cycle and is referred to as the biological clock. The posterior pituitary gland releases hormones such as oxytocin and antidiuretic hormone, but it does not play a role in regulating circadian rhythms. The hypothalamus plays a key role in regulating various bodily functions, but it does not produce melatonin. The thymus is a gland in the chest that plays a role in the immune system, but it does not produce hormones that regulate circadian rhythms.