L2 Cell To Cell Communication Flashcards

1
Q

How do cells sense changes

A

Through receptors

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2
Q

What happens when a receptor receives info

A

Generates an intracellular signal

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3
Q

What are receptors

A

Proteins
Activated by stimulus
Sensitive to external and internal environmental change

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4
Q

Give some example of sensory receptors

A

Baroreceptors
thermoreceptors
Photoreceptors

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5
Q

What type of impulse do they respond to
Give examples

A

Electrical impulse
Voltage gated ion channel

Chemical
Ligand gated ion channel

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6
Q

What is meant by endogenous ligands

A

Produced by the body itself

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7
Q

Example of endogenous ligand

A

Insulin acting on insulin receptors

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8
Q

What are exogenous ligands

A

Synthesised

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9
Q

Example of exogenous ligands

A

Artificial drugs
Or
Extracted from animals / plants

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10
Q

4 type of receptors

A

Ligand gated receptors
Enzyme linked receptors
G protein receptors
Intracellular protein

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11
Q

Ligand

A

Chemical that binds to receptors

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12
Q

Time scale of ligand gated ion channels

A

Milliseconds

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13
Q

What happens when a ligand buns to a ligand gated ion channel

A

Change in membrane potential

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14
Q

What happens when a ligand binds to a G protein receptor

A

Change in excitability

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15
Q

Time scale of G protein receptors

A

Seconds

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16
Q

What happens when a ligand binds to a enzyme linked receptor

A

Phosphorylation