What is a stimulus

Neurones description

Common features of neurons

Common features pt2- schwann cells/myelin sheath

Common features pt 3- nodes of ranvier

synaptic knob function

Axon ending/terminal function/ other parts

Sensory neurone

Relay neurone

Sensory receptor

Sensory receptor-more

The nervous system has 2 parts

- part 1- CNS

CNS- spinal cord description

Basic pattern of spinal nerves- dorsal and ventral root

Ventral

Dorsal

PNS

PNS pt2

Nerves

h

Stimulus= visible light

Stimulus: sound

stimulus: pressure

Stimulus: heavy pressure

Stimulus: chemical pt1

Stimulus: chemical pt2

Stimulus: temperature

Stimulus: gravity

Reflex Action

Reflex Arc

Elements of reflex arc

Reflex arc- temp

Reflex arc- example pupil reflex

nervous impulse- resting potential

nervous impulse- potential difference

reason for resting potential 1

What are sodium- potassium exchange pumps

reason for resting potential 2

Reason for resting potential-3

Action Potential

Difference between action potential and nervous impulse

Oscilloscope function

conclusions drawn using oscilloscope

conclusions drawn using oscilloscope pt 2

Depolarisation definition

Absolute Refractory period

How action potential travels along axon

Relative refractory period

Properties of nerves/impulses- 'All or nothing'

Factors affecting speed of conduction of nerve impulse- temp

Factors affecting speed of conduction of nerve impulse-Diameter of axon

Factors affecting speed of conduction of nerve impulse-Diameter of axon pt 2

Factors affecting speed of conduction of nerve impulse- myelination

What you see on oscilloscope

What you see on an oscilloscope pt 2

Role of synapse

Synaptic transmission pt 1

hSynaptic transmission pt2

Impact of drugs pt1

Impact of drugs pt2

Nicotine

Nicotine how you become addicted

Organophosphate

Organophosphates- effects

Nerve nets-evolution

Nerve net-description

nerve net- cell types

Hydra-nerve net

hydra- nerve net- ectoderm

Compare hydra to human