Question

cushings syndrome is caused by:
a hyposecretion of the adrenal cortex.
b hypersecretion of the adrenal cortex.
c hyposecretion of the thyroid gland.
d hypersecretion of the thyroid gland.

Explanation:

Cushing's syndrome is a hormonal disorder. It occurs due to excessive levels of cortisol in the body. The adrenal cortex is responsible for producing cortisol. Hypersecretion (excessive production) of the adrenal cortex leads to high cortisol levels, causing Cushing's syndrome. Hyposecretion of the adrenal cortex would lead to insufficient cortisol (Addison's disease). Hyposecretion or hypersecretion of the thyroid gland is related to thyroid - related disorders (like hypothyroidism or hyperthyroidism) not Cushing's.

Answer:

B. hypersecretion of the adrenal cortex.