Bio 118 Special Study Test 2: Page 8
1. your body temp decreases, so this stimulates the hypothalamus to release TRH, TRH heads to the anterior pituitary and stimulates the release of TSH, TSH tells the thyroid to release thyroxin (which affects the liver, heart, and muscles); thyroxin tells organs/tissues to increase the number of cellular mitochondria and metabolic enzymes, metabolic rate therefore increases, energy production increases, and body temp is raised!!! Thyroxin will feed back to the hypothalamus and anterior pituitary to inhibit them; if there’s no IODINE, thyroxin is decreased, so feedback is decreased, but TRH and TSH release still continues, so the thyroid is stimulated to mitosis so more cells might make more thyroxinà goiter
2. indirect effects: GH stimulates the liver to synthesize and release insulin-like growth factors (IGFs); IGFs are mitogens: they stimulate mitosis and protein synthesis in cells; all of this concerns the growth and maintenance of tissues
direct effects: GH will go to adipose cells, break down fats, and increase the number of fatty acids in the blood OR it will go to other cells like the liver, break down glycogen, and increase glucose in the blood; all of this concerns energy mobilization
3. see above
4. indirect effects: when blood glucose is high, direct: when it’s low
5. NO IDEA
I try to experience new things and accomplish all of my goals as best as I can.
Chemical Dependency is nothing to laugh at and has wrecked more lifes than you can imagine.
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