Stimulus meaning

How a stimulus works

More on sensory receptors

Stimulus= visible light

Stimulus: sound

stimulus: pressure

Stimulus: heavy pressure

Stimulus: chemical pt1

Stimulus: chemical pt2

Stimulus: temperature

Stimulus: gravity

The nervous system has 2 parts- part 1- CNS

CNS- spinal cord description

The nervous system has 2 parts- part 1- PNS

PNS pt 2

The reflex arc

Reflex action

Elements of reflex arc

put diagram of reflex arc

reflex arc example

Reflex arc- example pupil reflex

do diagram of spinal column-neurones

nerve nets-evolution

nerve net-description

nerve net- cell types

Hydra nerve net

hydra- nerve net- ectoderm

compare hydra to human

Neurones-description

3 types of neurones

Cell body/ centron function

Cytoplasm function

Nucleus function

Nissl granules

Dendrite function

Axon function

Schwann cells function

Myelin sheath function

Nodes of Ranvier function

synaptic knob function

Axon ending/ terminal function

nervous impulse- resting potential

nervous impulse- potential difference

reason for resting potential 1

reason for resting potential 2

Reason for resting potential-3

Other reasons for resting potential

Action Potential Definition

The action potential

Oscilloscope function

conclusions drawn using oscilloscope

conclusions drawn using oscilloscope pt 2

Depolarisation definition

How action potential travels along axon

Absolute refractory period

Relative refractory period

Properties of nerves/impulses- 'All or nothing'

All or nothing law effect

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

Factors affecting speed of conduction of nerve impulse- myelination pt 2