receptors and second messengers

Question 1

compound produced in one cell, used to transmit a message to other cells

Answer 1

signaling molecule

Question 2

specific protein, is site for binding of a signaling molecule

Answer 2

receptor

Question 3

protein ultimately activated by receptor

Answer 3

effector

Question 4

compound that binds to a spcific site on a protein

Answer 4

ligand

Question 5

ligand that binds to a receptor and activates effector

Answer 5

agonist

Question 6

ligand that binds to receptor but does not activate effector, prevents agonist from binding to receptor

Answer 6

antagonist

Question 7

binds to receptor and inactivates effector

Answer 7

inverse agonist

Question 8

competes with an agonist for some binding site on a receptor

Answer 8

competitive antagonist

Question 9

most ligand ion gated channels constructed form five distinct subunits

Answer 9

pentamers

Question 10

photosensitive cells of the retina (2)

Answer 10

rods and cones

Question 11

eye cells sensitive to light, dont detect color

Answer 11

rods