Question

When a rat's ventromedial nucleus is destroyed, the rat will:

Answer 1

The correct answer is C. It continues to eat the amount of food it does normally.

When rat's ventromedial nucleus is destroyed the rat will become more hyper physics and it continues to eat until it has doubled its normal weight.

Ventromedial nucleus of hypothalamus is termed as nucleus of hypothalamus.

It is a distinct morphological nucleus which involved in terminating hunger, fear, sexual activity and thermoregulation.

Ventromedial nucleus of hypothalamus is divided into subdivisions. For example, dorsomedial, ventrolateral, central and anterior. VMN is most commonly associated with satiety. In rats ventromedial nucleus is caused by over-eating and obesity.

Answer 2

Answer:

B (begin to eat uncontrollably)

Explanation:

The ventromedial nucleus also known as the ventromedial hypothalamus is a distinct nucleus located inside the hypothalamus of the brain. It is known as a nucleus because it is a distinct group of neurons within the hypothalamus. The nuclear region is involved in terminating hunger, bringing about satisfaction in organisms.

It is responsible for the feeling of satisfaction or fullness after eating, in organisms. Its stimulation induces cessation of eating in an animal. It tells organisms when they have eaten enough, hence, to stop eating.

However, lesions or damage to this satiety center (Ventromedial nucleus) results in overeating and subsequently obesity because the organisms are not getting the information that they are full.

Hence, when the ventromedial nucleus of a rat is destroyed, it no longer gets the awareness of satisfaction when eating, hence, it eats uncontrollably.