1.2 (P1) Nerves And Hormones Flashcards Preview

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Flashcards in 1.2 (P1) Nerves And Hormones Deck (14)
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1

What is a stimulus?

A change in the environment

2

What detects stimuli?

Receptors

3

What detects light

A light receptor

4

What is a neurone?

A cell that transmits nerve impulses

5

What is transmitted along a neurone

Electrical impulses

6

Go through the reflex arc

Stimulus
Receptor
Sensory Neurone
Intermediate/Relay Neurone
Motor Neurone
Effector

7

What is the co-ordinator?

The central nervous system

9

What does the sensory neurone do?

Carries nerve impulses from the sense organs (receptor) to the central nervous system

10

What could be involved in the central nervous system?

The spinal cord
The brain

11

What does the motor neurone do?

Carries nerve impulses from the central nervous system to the effector

12

What is the gap between neurones called?

A synapse

13

How is information passed across the synapse

Chemical messengers or neurotransmitters are diffused across the gap

14

What is an effector

A gland or muscle that gives a response to the initial stimulus

15

What does the intermediate/ relay neurone do?

Carries nerve impulses around the central nervous system