Question

1. A deficiency in what hormone could cause our immune system to weaken

2. What would be a major symptom if a person had a decrease in ADH production?

3. What part of the adrenal gland is controlled by the autonomic nervous system (a) and what part is controlled by the presence of other hormones (b)

a. ___________ b. _________

Answer 1

1. The Thymus is a lymphatic system organ which play a special role in adaptive immune system. The thymus produce hormone called thymosin. Its primary function is to stimulate the production of T cells, which provide cell mediated immunity. It also helps in production of antibodies.

The answer is Thymosin.

2. Antidiuretic hormone or Vasopressin, is produced by the hypothalamus and stored in the posterior pituitary gland. when their is a decreased body water level (hypovolemia, hypotension), it is secreted by the posterior pituitary gland which act on the kidneys to reabsorb water from the urine and there by regulate the water balance in the body. when there is decreased aldosterone, The kidney will excrete more water in urine causes polyuria and increased thirst due to water lose.

The answer is polyuria or increased urination. (along with excess thirst).

3. Adrenal gland is also known as suprarenal glands which are located on the top of each kidneys. It is an endocrine gland which has two parts, the outer cortex and inner medulla. The adrenal medulla is controlled by sympathetic nervous system via preganglionic fibers. Sympathetic nervous system is a part of autonomic nervous system. Adrenal cortex is stimulated by adrenocorticotropic hormone (ACTH) which is secreted by the anterior pituitary gland. The layers of adrenal cortex produce endocrine, mineralocorticoids, and  androgens in response to ACTH.

Thus the answer is a) medulla b) cortex