Lec 33

Question 1

Cell signaling step 1

Answer 1

Signal molecule binds to receptor

Question 2

Cell signaling step 2

Answer 2

Signal transduction

Once the receptor is activated the signal is passed along to other channels

Question 3

Cell signaling step 3

Answer 3

Change in cell behavior

Question 4

Responses to cell signals are

Answer 4

Preprogrammed

cell already knows what to do

Question 5

One signal may trigger

Answer 5

Several responses

Question 6

Signals are amplified during

Answer 6

Transduction

Question 7

Signals may be integrated

Answer 7

During transduction

Question 8

Combined PSPs control

Answer 8

Frequency of action potentials

Question 9

Types of signaling systems

Classification

Answer 9

How close are the two cells

What is the nature of the signal molecule

Question 10

Contact dependent signaling

Signal

Answer 10

Membrane proteins

Question 10

Contact dependent signaling

Answer 10

Adjacent cells

Question 11

Paracrine signaling

Answer 11

Local cells

Question 12

Paracrine signaling

Signal

Answer 12

Diffusible molecules released locally

Question 13

Synaptic signaling

Answer 13

Distant cells

Question 14

Synaptic signaling

Signal

Answer 14

Diffusible molecule delivered by a cell extension

Question 15

Endocrine signalling

Answer 15

Distant cells

Question 16

Endocrine signaling

signal

Answer 16

Diffusible molecule delivered by circulatory system

Question 17

Types of signals

Answer 17

Proteins

Small organic molecules (adrenaline, estrogen, acetylcholine)

Gasses

Extracellular vesicles