A&P - Chapter 26 (Part 2) Flashcards
What does TSH act on?
The thyroid gland
What does TSH do?
Promotes and maintains growth and development of the thyroid gland
What does the TSH stimulate?
The thyroid to secrete hormones
What does the ACTH act on?
The adrenal cortex
What does ACTH do?
Promotes and maintains normal growth and development of the adrenal cortex
What does the ACTH stimulate?
The adrenal cortex in order to secrete some of its hormones
- mainly cortisol
What does FSH act on?
Male and female gonads
- testes/ovaries
What does FSH do in females? (2)
- Stimulates the primary follicles of the ovary to mature in preparation for ovulation
- Stimulates follicle cells to secrete estrogen
What does FSH do in males?
Stimulates the development of the seminiferous tubules of the testes and maintains tubules sperm production
What is another word for LH?
Ovulating hormone
What does LH act on?
Males and females gonads with FSH
What does LH do in females? (3)
- Stimulates the formation and activity of the corpus luteum in the ovary after luteinization
- Stimulates progesterone and estrogen secretion by corpus luteum
- Supports FSH in stimulating maturation of follicles
Luteninization
Follicle rupture
What does LH do in males?
Stimulates testes to produce and secrete testosterone
What are FSH and LH also known as?
Gonadotropins
- stimulate growth and maintance of the gonads
When do gonadotropin hormones peak?
At puberty
What does the hypophyseal portal system do?
Control the adenohypophysis secretion
What synthesizes releasing hormones?
Cell bodies or neurons in certain parts of the hypothalamus
Where do releasing hormones travel?
Down axons that secrete them into the blood
How do releasing hormones enter the blood?
Through the hypophyseal portal system
What do adenohypophysis contain?
Target cells of the releasing hormone
What happens when the target cells are stimulated?
Secretion of the hormones from the adenohypophysis
How are secretions controlled in the hypophyseal portal system?
By the hypothalamus
- along with negative feedback loops
Where are ADH and oxytocin produce?
In nerve cell bodies in the hypothalamus
What does ADH act on? (2)
- Kidneys
2. Tubules
What does oxytocin act on? (2)
- Uterus
2. Mammary glands
