Question

Trophic hormones are produced by
A) Anterior pituitary
B) Middlepituitary
C) Posterior pituitary
D) Thyroid

Answer 1

Hint: Hormones are called as the body's chemical messengers. These are the molecules that are produced by the endocrine system. They control and coordinate the activities throughout the body. Hormones are secreted directly into blood. The hormone binds to a receptor and produces response.

Complete Answer:
- The trophic hormones are the hormones which result in hyperplasia or hypertrophy of the tissue.
- The trophic hormones are secreted by anterior pituitary. They are
1) Thyroid stimulating hormone- stimulates the thyroid glands result in increasing the size and the number of cells.
2) Adrenocorticotropic hormone- stimulates the adrenal cortex results in increasing the size and number of cells.

So the correct answer is anterior pituitary.

The anterior produces six more hormones such as prolactin, growth hormone, TSH, LSH, FSH, ACTH. A hormone can be both tropic and trophic. TSH is both tropic as well as trophic hormone. TSH is tropic because it has another gland as its target and TSH is trophic because it causes growth and differentiation of follicular tissue.

Note: Tropic hormones are the hormones which target the other endocrine glands. The tropic hormones are secreted by hypothalamus which targets the anterior pituitary.
- The thyroid glands secrete the thyroxine which targets the hypothalamus and is called a tropic hormone.
- Gastrin is a trophic hormone that causes hyperplasia of enterochromaffin cells that can also result in tumor.