Nervous System

Processes information to and from the PNS Includes the brain and spinal cord

Carries information to and from the CNS and sensory organs Includes neurone that connect the rest of the body to the CNS

Responses produced by the body which are conscious and involve the individuals thinking time

Responses subconsciously produced by the body usually to protect it

Insulates electrical impulses across a nerve cell, (made of Schwann cells)

Extensions at the (front) end of a nerve cell which connect to other nerve cells to pass electrical impulses

Where electrical impulses are transported along a nerve cell

The end of a nerve cell which connects to other nerve cells to receive electrical impulses

The tips of the axon terminal which inflates and connects to dendrites on other cells to receive electrical impulses

gas between the myelin sheath that help assist faster impulses and allow substances to diffuse in and out the cell

A spherical organelle which helps develop and regenerate peripheral nerves

Stimuli, Receptor, Sensory Nuron, Relay Neuron (spinal cord), Motor Neuron, Effector (muscle or gland), response

A gap between two neurons

Electrical impulses diffuse into chemical signals, they then pass through the neuron and diffuse back into electrical signals in the neuron

A faster immune response subconsciously produced by the body to protect itself (from harm)

Stimulus Receptor Sensory neuron Relay neuron (spinal cord) Motor neuron Effector (muscle/gland) Response

The space between the pre and post-synaptic cells

Clustered at pre- synaptic cell and contain neurotransmitters which are triggered by Ca+ to release (the neurotransmitters) by exocytosis

The change in voltage of a (nerve) cell membrane during a nervous impulse

A drug which inhibits synaptic transmission, It does this by stimulating the release of dopamine (at abnormally higher levels) This leads to feeling high/happy And once this falls a persons mood is lower leading to a cycle of addiction

• Increased heart rate • Dry mouth • Reddening of eyes • feeling sick • hallucinating

A drug which increases synaptic transmission by triggering the release of acetylcholine (used during muscle contraction) which therefore leads to a higher heart rate

• rising body temp. • frequent urination • anxiety • dehydration • irritability • trembling hands

A disease caused by a misfolded protein which can transmit to other proteins and cells leading to more misfolded proteins and cellular death (and then death)