Chapter 7

Question 1

types of chemical communication

Answer 1

paracrine
endocrine
synaptic

Question 2

paracrine signaling

Answer 2

acts over a longer range and involves the secretion of chemical signals onto nearby groups of target cells

Question 3

endocrine signaling

Answer 3

secretion of hormones into the blood stream where they can affect targets throughout the body

Question 4

3 components of chemical signaling

Answer 4

signal, ex: NT

receptor: NT receptors
effector: ion channel

Question 5

classes of cell signaling molecules

Answer 5

cell impermeant
cell permeant
cell associated molecules

Question 6

cell impermeant

Answer 6

cannot pass the plasma membrane

need to bind to the extracellular portion of the plasma membrane receptor proteins

Question 7

cell permeant

Answer 7

can cross the membrane and act directly on receptors inside cells

Question 8

cell associated signaling molecules

Answer 8

act only on cells they are physically in contact with that carry a specific signal

Question 9

what determines the cellular response?

Answer 9

receptors

Question 10

intracellular receptors

Answer 10

activate signal cascades

are activated by cell permeant molecules