Question
biology work sheet help
This exam is worth 200 points Short Sho rt Answer and Multiple Choice (7 pts each) Fig 1. 1. Which of the hormone ligands (A-C) What is the effect of Tglycoger phosphorylase activity orn a. 7. in Fig 1 binds to a tyrosine kinase receptor? Increased cellular glucose 2. What is the name of the membrane b. Increased cellular glucose-1-P associated enzyme AC? Decreased cellular glucose c. d. Decreased cellular glucose-1-P 3. Which GPCR binding hormone (A-C) has different cellular responses Which of the following hormones opposes glycogenolysis? a. Epinephrine b. Glucagon c. Insulirn d. cortisol 8. depending on availability of G- proteins? What is the key membrane substrate required for triggering a rise in cytoplasmic Ca2? 4. More sensitive Lessntive Which of the following half-maximal response concentrations for a hormone indicates the greatest receptor sensitivity? a. 0.1 nM b. 0.01 nM c. 1 nM d. 10 nM 5. 0.5 0.4 0.2 a.0 Fig 1 describes two signaling mechanisms associated with activating glycogen phosphorylase via epinephrine binding 10 100 1000 Hormone concentration inM) Fig 2 Which activating pathway utilizes Protein Kinase A? The a. Release of IP3 b. Activation of PDE c. Stimulation of AC 6. 9. What is the rich and complex network of intrinsic nerves of the submucosal and myenteric plexuses of the gut called?
Explanation / Answer
Ans-1) Insulin , Ans-2) Adenyl cyclase. Ans-4) IP3 , Ans-6) C , Ans-7) B , Ans-8 ) C, Ans-9) adrenalin and noradrenalin, Ans-10) a - histamine , b-HCl , c- somatostatin, d-ghrelin , e- gastrin , f- histamine
