Regulation of reproduction 1 (Chapter 5) Flashcards
(24 cards)
Hormones
- short
- binds
- regulates
Short half-life
Binds to specific receptors
Regulates intracelluar reactions
Five modes of action
- Neuroendocrine
- Endocrine
- Paracrine
- Autocrine
- Lactocrine
Mode when cells produce hormones that act on their neighbors
Paracrine
What is the primary delivery system of hormones?
Blood
What is the endocrine mode?
When every cell that is not a neuron produces a hormone that acts on a distant cell
Mode when a cell produces a hormone that acts on itself
Autocrine
What is lactocrine mode?
When the mother produces a hormone that goes into the milk and is absorbed by the neonate
What is the site of GNRH production?
Hypothalamus
GNRH goes to the (posterior/anterior) lobe
Anterior lobe (AL)
What are the final products after GNRH enters the portal system?
FSH and LH
What is the purpose of the portal system?
To provide quicker uptake of hormones
What is GNRH excretion pattern?
Pulse pattern
Where is oxytocin produced and where is it stored?
Produced in the hypothalamus
Stored in the posterior lobe (PL)
What type of hormone is GNRH?
Peptide hormone
What are two examples of protein hormones?
FSH and LH
For protein hormones which subunit makes them unique?
Beta subunit
How many peptide amino acids does GNRH contain?
Ten
What are all steroid hormones created from?
Cholesterol
(T/F) Males produce progesterone
True, but only for a split second before it becomes testosterone
What is the order of steroid hormone production?
- Cholesterol
- Progesterone
- Testosterone
- Estradiol
What is the enzyme aromatase responsible for?
Turning testosterone into estradiol
Four classifications of hormones
- Peptide
- Protein
- Steroid
- Prostaglandins
What are all prostaglandins derived from?
Arachidonate
Prostaglandin functions
F2:
E2:
Kills the corpus luteum
Stimulates progesterone production by the corpus luteum
