Communication Flashcards

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1
Q

List conditions required for enzymes to function properly?

A

Suitable temperature
Suitable ph
Aqueous environment that keeps substrates and products in solution

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2
Q

Define Stimulus

A

A change in the external or internal environment of an organism

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3
Q

Define response

A

The way in which the organism changes its behaviour or physiology in reaction to a stimulus

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4
Q

What will a good communication system Have/ do?

A

Cover the whole body
Enable cells to communicate with each other
Enable specific communication
Enable rapid communication
Enable both short term and long term responses

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5
Q

Three ways cells communicate with each other

A

Inside cells between components
Outside the cell between cells
Different molecules send different signals

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6
Q

What are the 2 major systems of communication?

A

Neuronal system: interconnected network of neurones (nerve cells) — rapid response

Hormonal system: Hormones released into blood from an endocrine gland. Recognised by target cells.— longer term responses

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7
Q

Describe how hormones are used as messengers

A

Hormones are chemical messengers transported in the blood
Cell communication is often mediated by a hormone
Target cells any cell with a receptor for a hormone
Hormone and receptor on target cells bind due to their complementary shapes
Binding causes the target cell to respond in a certain way

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