Question

question 28

causes increased pigmentation of the skin and mucous membranes.

thymocarcinoma

cushings syndrome

addisons disease

type 1 diabetes

question 29

dwarfism, simmonds disease, hypogonadism and sheehans syndrome all are caused by:

hypopituitarism

acromegaly

graves disease

diabetes

question 30

the diagnostic term for a chronic disease caused by underactivity of the pancreatic beta cells in the islets of langerhans is:

diabetes mellitus

diabetes insipidus

graves disease

addisons disease

Explanation:

• Question 28: Addison's Disease is caused by adrenal gland insufficiency. The lack of cortisol feedback leads to increased ACTH (adrenocorticotropic hormone) production. ACTH has melanocyte - stimulating properties, causing increased pigmentation of the skin and mucous membranes. Thymocarcinoma is a cancer of the thymus, Cushing's Syndrome is due to excess cortisol (usually with skin striae, weight gain, etc., not increased pigmentation), and Type 1 Diabetes is related to insulin - producing beta - cell destruction (no direct pigmentation link).
• Question 29: Hypopituitarism is a deficiency of pituitary hormones. Growth hormone deficiency can lead to dwarfism, Simmonds' disease (panhypopituitarism), hypogonadism (due to lack of gonadotropins), and Sheehan's syndrome (pituitary infarction often after childbirth - related blood loss, leading to pituitary hormone deficiencies). Acromegaly is due to excess growth hormone (usually in adults, with bone overgrowth), Graves' disease is an autoimmune hyperthyroidism, and diabetes (Type 1 or 2) is related to glucose metabolism (not directly to these conditions).
• Question 30: Diabetes mellitus is caused by underactivity (Type 1 - autoimmune destruction) or resistance (Type 2) of pancreatic beta cells in the Islets of Langerhans, leading to insulin deficiency or ineffective insulin action. Diabetes insipidus is due to antidiuretic hormone (ADH) issues (either lack of ADH - central or resistance - nephrogenic, causing polyuria of dilute urine). Grave's disease is hyperthyroidism, and Addison's disease is adrenal insufficiency (not related to beta - cell underactivity).

Answer:

• Question 28: Addison's Disease
• Question 29: Hypopituitarism
• Question 30: Diabetes mellitus