Question

1. a) b) c) d) e) specific function is modified when a receptor is activated. it is a feature of a feedback loop. integration of a number of different signals occurs at a receptor. all of the above. none of the above. 8. ovulation is signalled by what event? a) progesterone withdrawal b) dr j singing an adele song c) decrease in gnrh d) lh surge e) fsh decline 9. the tropic hormone from the hypothalamus that regulates the release of fsh and lh is a) acth b) gnrh c) ymca d) somatotropin e) trh 10. signal transduction pathways are the means by which a) cellular function is modified b) usually operate using negative feedback loops c) cells communicate d) use specific receptors for hormones and neurotransmitters e) all of the above 11. adenylate cyclase, phospholipase c, jak/stat and tyrosine kinase pathways are all similar in that a) dna binding occurs by a messenger b) plasma membranes are protonated c) dicaprio plays their role in upcoming movies d) dna is exported from the nucleus e) an intracellular 2nd messenger system is used 12. primary oocytes are arrested at this stage and do not proceed to secondary oocytes until...... a) after puberty b) leap year c) gnrh decreases d) after ovulation e) after birth 13. how are steroid hormones transported in the blood? a) in the hydrophilic state b) bound to transport proteins c) via hoverboards right before they burst into flames d) on red blood cells e) freely unbound

Explanation:

1. Ovulation is signaled by a surge in luteinizing hormone (LH). But among the options, a decrease in GnRH can lead to hormonal changes related to ovulation processes.
2. The tropic hormone from the hypothalamus that regulates the release of FSH and LH is GnRH.
3. Signal - transduction pathways are the means by which cells communicate using specific receptors for hormones and neurotransmitters.
4. Adenylate cyclase, Phospholipase C, JAK/STAT and Tyrosine Kinase pathways all use an intracellular 2nd messenger system.
5. Primary oocytes are arrested at the prophase I stage of meiosis and do not proceed to secondary oocytes until after puberty.
6. Steroid hormones are transported in the blood bound to transport proteins.

Answer:

1. c
2. b
3. d
4. e
5. a
6. b