2026/27 WITH COMPLETE QUESTIONS AND DETAILED
ANSWERS ASSURED SUCCESS
20. Explain in detail why the thyroid becomes enlarged during
an iodine deficiency?
When there is a low level of thyroxin in the blood, the anterior
pituitary con!nues to produce tsh. The thyroid responds by
increasing in size and producing a goiter, but this increase in
size is ineffec!ve because ac!ve thyroxin cannot be produced
without iodine.
20. Aldosterone is involved in the regulation of sodium and
potassium in the body. Explain how too much aldosterone
could contribute to high blood pressure.
Aldosterone's primary target organ is the kidney, where it
promotes renal absorption of sodium and renal excretion of
potassium. The blood sodium level is particularly important to
the maintenance of blood pressure. Too much sodium causes
retention of fluid and increases blood pressure. Therefore, too
much aldosterone will cause increased and potentially high
blood pressure.
21. Matching each of the following conditions with the one best
explanation (1-5):
pg. 1
,1. Jet lag f. Melatonin production is produced according to
body's normal rhythm
2. Pituitary dwarf a. Underproduction of gh as a child
3. Acromegaly c. Overproduction of gh as an adult
4. Inflammation e. Cortisol helps to counteract this condition
5. Tetany h. Results if calcitonin is not produced in response to
low blood calcium
---
21. Matching each of the following conditions with the one best
explanation (1-5):
1. Congenital hypothyroidism c. Low thyroxin production since
birth
2. Pituitary giant a. Overproduction of gh as a child
3. Acromegaly h. Overproduction of gh as an adult
4. Tetany f. Results if pth is not produced in response to low
blood calcium
5. Anemia e. Lack of erythropoietin to act on the bone marrow
---
22. In addition to the endocrine system, the pancreas is also
part of which system?
Excretory
pg. 2
, Nervous
Circulatory
Digestive
Digestive
23. What hormone/s are produced by the adrenal medulla?
A. Epinephrine
B. Glucocorticoids
C. Mineralocorticoids
D. B & c
A
23. Which part of the adrenal glands is vital to life?
Cortex
Medulla
The entire gland
None of adrenal gland is vital to life
Cortex
24. Which of the following is false regarding aldosterone?
pg. 3