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Topic 8 > Nerves > Flashcards

Flashcards in Nerves Deck (18):
1

What is the purpose of dendrites?

conducts impulses towards cell body

2

Whats the purpose of an axon?

Transmits impulses away from cell body

3

What does the cell body contain?

Nucleus

4

Describe motor neurone

Spinal cord - Impulses from CNS to effectors

5

Describe sensory neurone

Cell body coming off of axon, PNS
Sensory cells to CNS

6

Describe relay neurone

Cell body in axon
CNS, sensory-motor

7

What do schwann cells do?

wrap around axon creating insulating layer called myelin sheath

8

What are the gaps between schwann cells?

Nodes of Ranvier

9

Define nerve

Bundle of axons of many neurones that transmits impulses to the brain or spinal cord

10

What is grey matter made of?

cell bodies, synapses and dendrites

11

What is white matter made of?

nerve axons

12

What is the definition of a receptor

Detect stimuli and send impulses to CND

13

Define effector

Tissue that responds to a nerve impulse or hormone

14

Define reflex

pattern of behaviour involving a rapid response to stimulus

15

Describe pupils constricted

Radial muscles relax and circular muscles contract

16

Describe pupils dilated

Radial muscles contract and circular relax

17

Describe the stages of impulses

Receptor, sensory, relay, motor, effector resposnse

18

Describe pupil reflex

Receptor, sensory, relay, parasympathetic, motor, effector ,response