10.3 - Hypothalamus Pituitary Connection

Question 1

Where does the hypothalamus produce hormones? What are they? Where are they stored?

Answer 1

Produces hormones (Oxytocin and ADH) in neurosecretory cells

• > these hormones are carried to the posterior lobe of pituitary via nerve cells
• > these hormones are then stored in the posterior lobes to be released in blood when needed

Question 2

Where are releasing hormones produced and transported to? What are they?

Answer 2

In the neurosecretory cells in the hypothalamus
-> releasing are secreted in the blood and carried to anterior lobe of pituitary

1. TRH and TSH
2. GnRH and FSH, LH
3. ACRH and ACTH

Question 3

Why do releasing hormones target anterior lobe?

Answer 3

Direct it to secrete a hormone in the blood

Question 4

When will hypothalamus release TRH?

Answer 4

Low body temperature

Question 5

What are the 3 releasing hormones produced by hypothalamus?

Answer 5

TRH, ACRH, GnRH

Question 6

Differences between anterior and posterior pituitary?

Answer 6

1. Posterior neurons extend into posterior lobe, anterior does not (stop at end of hypothalamus)
2. Posterior hormones enter through nerves, anterior hormones enter through blood