Please enable JavaScript.
Coggle requires JavaScript to display documents.
Shit I Don't Know About Unit 3 - Coggle Diagram
Shit I Don't Know About Unit 3
Memory
Involves encoding, storage and retrieval of information
All information entering the brain passes through sensory memory and enters short-term memory
Capacity of short-term memory can be improved by chunking
Our 'working memory' is an extension of our short-term memory; it can process and manipulate data in STM
Can use contextual clues to make a memory more powerful and easier to recall later in life
Rehearsal can be used to increase the length of time information is stored in the STM
Cells of Nervous System
Axon - impulse away from cell
Dendrites - impulse toward cell
Myelination is the process of myelin developing around axon fibres
Myelin sheath maintains homeostasis, form myelin and provide support for neurons
Glial cells can remove any debris by phagocytosis
Synapses
Gap between two neurons
Neurotransmitters at synapses
3
. Diffuse across synaptic cleft - bind with receptors - post-synaptic
4
. Receptors specific to neurotransmitters
2
. Reaches dendrites - neurotransmitters released
5
. Impulse released from second neuron - axon...
1
. Impulses along axon - pre-synaptic
Neurotransmitters
Stored in vesicles in pre-synaptic neuron
Neurotransmitters are removed from synaptic cleft between impulses to prevent continuous stimulation of post-synaptic neurons
Re-uptake and enzyme degradation
Excitatory - increases contraction, inhibitory decreases
Critical number of neurotransmitter molecules required
Summation of a series of weak stimuli can trigger an impulse
Mood/Behaviour
Endorphins - reduce pain intensity (injury, exercise, stress, food)
Dopamine - pleasure or reinforcing behaviour as part of reward pathway
Drugs
Agonists - mimic - tolerance - desensitisation
Antagonists - block - addiction - sensitisation
Inflammatory Response
3
. Vasodilation and increased capillary permeability
4
. Increased blood flow
2
. Mast cells release histamine
5
. Phagocytes and clotting elements accumulate
1
. Injury or infection
Lymphocytes
B cells
T cells
Somatic - contraction of skeletal muscles
Autonomic - contraction of smooth muscles