Cellular communication

tazaseje's version from 2016-10-06 15:29

Section 1

Question Answer
homeostatic reflex pathwaysstimulus, sensor, input signal, intergrating signal, output, target, response
simple endocrine reflex Endocrine cell to body cells, change in enzyme reaction, membrane transport, or cell protein, slower then neural response
antagonist control two signals with one receptor type competing with each other.
tonic control pattern one signal, one receptor type, response is vessel constriction
termination of receptor activity removal of signal molecule, termination of intracellular response
alpha receptor causes vessel restriction
beta receptorvessel dialates
up regulationincrease cell response, # of receptors goes up
down regulationdecrease cell response, #of receptors goes down
beta blocker drug block signal molecule from binding, antagonist
Norepinephrine and epinephrine active receptors work together as teammates, agonist
saturationtoo many receptors, plateau of rate of reaction will decrease
specifity signal molecules must fit to activate receptor.
affinityhow tightly bound molecules are
simple neuron reflexeach neurons targets a few cells, is very fast, takes little time

Section 2

Question Answer
1st step of signal transduction signal molecule binds to receptor membrance protein in cell membrane
2nd step of signal transductionintracellular molecules are activated by GPCR, which then activate target protein
final goal of signal transduction create response
GPCR and adenylyl cyclase starts in cell membrane, GPCR activates adenylyl the amplifier, ATP creates camp, camp activates kinase A, which affects target protein and creates response
DAGcreated from GCPR-> PLC, activates PKC which phosporolates target protein
IP3 created from GCPR-> PLC, ip3 enters ER and activates ca2 which causes a cellular response