Question

the endocrine gland labeled 5 in the diagram below is the:
a. anterior pituitary
b. testis
c. posterior pituitary
d. thyroid

the primary function of parathyroid hormone is
a. to produce vitamin d2
b. prevent calcium release from bony stores
c. maintaining normal blood calcium levels
d. to release vitamin c

Explanation:

Identify gland 5 in the diagram

The diagram shows the endocrine system of a horse. Label 5 points to the ventral neck region, just below the larynx, which corresponds to the thyroid gland.

Determine parathyroid hormone function

Parathyroid hormone (PTH) is secreted by the parathyroid glands. Its primary physiological role is to increase and maintain normal calcium levels in the blood.

Answer:

Question 1

• a. anterior pituitary
• b. testis
• c. posterior pituitary
• d. thyroid (Correct answer)

Question 2

• a. To produce vitamin D2
• b. Prevent calcium release from bony stores
• c. Maintaining normal blood calcium levels (Correct answer)
• d. To release vitamin C