Question

Gonadotropin-releasing hormone is formed by
(a) Adenohypophysis
(b) Pars intermedia
(c) Neurohypophysis
(d) Hypothalamus

Answer 1

Hint: Gonadotropin-releasing hormone is secreted by the endocrine gland which controls the eating, drinking and the body temperature in our body. It is the basal part of the diencephalon or forebrain. It lies at the base of the thalamus.

Complete answer:
Gonadotropin-releasing hormone is formed by the hypothalamus. Let's begin the explanation by studying the fundamentals.
There are three major parts of the brain, they are forebrain, midbrain, and hindbrain. The forebrain is made up of the cerebrum, thalamus, and hypothalamus. Hypothalamus is a very important part of the brain. It is connected to the pituitary gland by a pituitary stalk or hypophyseal stalk.
Being an endocrine gland hypothalamus releases a number of hormones. Let us learn about them.
Hypothalamus regulates the synthesis and secretion of anterior pituitary hormones by secreting some releasing and inhibitory hormones. They are:
- Growth hormone-releasing hormone (GHRH)
- Growth hormone-releasing polypeptide (GHRP)
- Growth hormone inhibitory hormone (GHIH)
- Thyrotropin-releasing hormone (TRH)
- Corticotropin-releasing hormone (CRH)
- Gonadotropin-releasing hormone (GnRH)
- Prolactin inhibitory hormone (PIH)
- The posterior part of the pituitary gland is under the direct neural regulation of the hypothalamus.
- The gonadotropin-releasing hormone stimulates the pituitary synthesis and causes the release of gonadotropins.
So, the correct answer is, ‘Hypothalamus.’

Note:
- The pituitary gland is divided into two parts namely the anterior pituitary and posterior pituitary.
- The anterior pituitary is also called adenohypophysis. It is responsible for the secretion of growth hormone (GH) or somatotropic hormone (STH).
- Anterior pituitary has three divisions namely Pars distalis, Pars tuberalis, and parts intermedia.
- The posterior pituitary is also called neurohypophysis. It secretes antidiuretic hormone (ADH) or vasopressin and oxytocin.