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WorksheetsCell communication
Total questions: 17
Worksheet time: 15mins
Name
Class
Date
1.
3 general stages of cell communication:
A ===> B ===> C
a)
A. Response
B. Reduction
C. Reception
b)
A. Reduction
B. Reproduction
C. Response
c)
A. Reception
B. Reduction
C. Response
d)
A. Reduction
B. Reproduction
C. Reception
2.
What do you call it when two neurons communicate through neurotransmitters?
a)
Hormones
b)
Synapse
c)
Cholesterol
d)
Monty
3.
What is an organic compound that is made by glands in the body (pituitary, thyroid, etc) that is used in long distance communication between cells?
a)
Hormones
b)
Neurotransmitters
c)
Synapse
d)
Carbohydrates
4.
Which of the following would be an example of paracrine signaling in animals?
a)
neurotransmitter acetylcholine
b)
hormone epinephrine
c)
neurotransmitter norepinephrine
d)
growth factor
5.
A signal molecule that binds to a plasma-membrane protein is a
a)
ligand
b)
second messenger
c)
protein kinase
d)
receptor protein
6.
What is a G protein?
a)
specific type of membrane-receptor protein
b)
protein on the cytoplasmic side of a membrane
c)
membrane-bound enzyme
d)
relay protein
7.
Which of the following can activate a protein by transferring a phosphate group to it?
a)
cAMP
b)
G Protein
c)
protein kinase
d)
protein phosphatase
8.
What do second messengers do?
a)
transport a signal through the lipid bilayer
b)
relay a signal from the outside to the inside of the cell
c)
relay message from the inside of the mebrane throughout the cytoplasm
d)
dampen the message
9.
What is a function of the second messenger IP3?
a)
bind to and activate protein kinase A
b)
activate transcription factors
c)
convert ATP to cAMP
d)
bind to and open ligand-gated channels
10.
Signal amplification is most often achieved by
a)
an enzyme cascade
b)
binding of multiple signals
c)
branching pathways
d)
action of adenylyl cyclase
11.
What does a protein kinase do?
a)
removes phosphates
b)
transfers phosphates from ATP to proteins
c)
activates an enzyme
12.
What does a protein phosphatase do?
a)
removes phosphates
b)
transfers phosphates from ATP to proteins
c)
activates an enzyme with a signal molecule
13.
What determines whether a cell is a target cell for a particular signal molecule?
a)
phosphorylation cascade
b)
cAMP
c)
signal receptors
d)
phosphatase
14.
Do plant cells communicate using hormones?
a)
yes
b)
no
15.
What determines whether a signal molecule binds on the surface or enters the cell?
a)
size
b)
polarity
c)
ability to cross the membrane
d)
all of these are correct
16.
Which of the following is a chemical message that usually travels through the bloodstream to target cells?
a)
hormone
b)
local regulator
c)
endocrine cell
17.
What do you call when a cell signals itself?
a)
self-signaling
b)
autocrine
c)
retrocrine
d)
merocrine
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