hi ,i have alot of qs ,if any one can help to answer it.i hope we can find the correct answer
1- mythyl xanthines such as caffeine and theophyline enhance lipolysis in adipose tissue by
-including adenylate cyclase synthesis
-including triglyceride lipase synethesis
-inhibiting cyclic AMP...........answer
-directly activating an intracellular protein kinase
-enhancing the binding of epinephine to an extracellular membrane receptor
2-which of the following statment best describe GTP binding proteins ( G protein)
-are important component of steroid hormone signal transduction
-catalize the reaction which produce diacylglycerol
-are tightly bound to adenylate cyclase
-usually inactive protein kinase C
-are membrane proteins
3-total urinary nitrogen excretion is least when an individual is
-starving
-on a well balanced diet
-on a diet containing adaquate fat and carbohydrate but no protein .....answer[not sure]
-on a diet containing adaquate protein but no fat or carbohydrate
4 dry heat destroys microorganisms primarily by
-lysis
-oxidation
-precipitation of salts
-coagulation of protein.....answer[
http://en.wikipedia.org/wiki/Dry_heat_sterilization#Effect_on_microorganisms]
-acceleration of enzyme metabolism
5-in erythropoiesis which of the following increases from the proerythroblast to the mature erythrocyte
-cell size-phagocytic ability
-cytoplasmic acidophilia ......answer
-cytoplasmic basophilia
6-initially the developing heart is
-induced by the notochord
-positioned posterior to the notochord
-positioned anterior to the prochordal plate ......answer
-between the prochordal plate and the notochord
7-the largest incisla or occlusal embrasure is located between which of the following teeth
-max cental and lateral incisors
-mandibular central and lateral incisors
-maxillary lateral incisor and canine.....answer
-mandibular lateral incisor and canine
-maxillary canin and first premolar
8- the clearance of several substance was measured at a constant glomerular filteration rate and constant urine flow rate ,but at increasing plasma concentration of substance .under these conditions ,clearance will increase at high plasma concentrations for which of the following substances
-ceatinine
-mannitol-
penicillin
-phosphate
-urea
9-each of the following is character of creatinine except one .which one is the exception
-freely filtered
-slightly secreted
-slightly reabsorbed
-produced endogenously at a constant rate
10-the receptors for the hormones that causes blood glucose level to quickly drop are located on which cellular component in target cells
-mitochondrial matrix
-nuclear matrix
-nuclear membrane
-plasma membrane.....answer
-smooth endoplasmic reticulum