Neurons and synaptic transmission Flashcards Preview

A-LEVEL PSYCHOLOGY PERSONALISED FLASHCARDS > Neurons and synaptic transmission > Flashcards

Flashcards in Neurons and synaptic transmission Deck (9)
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1

What is the structure of a neuron?

A cell body, dendrites (receives signals from neurons)and an axon.

2

What do sensory neurons do?

Carry impulses from sensory receptors to the Central Nervous System.

3

What do motor neurons do?

Form synapses with muscles and glands.

4

What do relay neurons do?

Allow sensory and motor neurons to communicate.

5

What is synaptic transmission?

The process by which a nerve impulse passes across the synaptic cleft from one neuron (the presynaptic neuron) to another (the postsynaptic neuron)

6

How are receptors in the postsynaptic stimulated neuron stimulated?

Synaptic vesicles release neurotransmitters and they either produce an excitatory or inhibitory effect. Excitatory effect produces new action potential.

7

What is spatial summation?

A large number of EPSPs are generated at many different synapses on the same postsynaptic neuron at the same time.

8

What is temporal summation?

A large number of EPSPs are generated at the same synapse by a series of high-frequency action potentials on the presynaptic neuron.

9

Why does temporal and spatial summation take place?

A nerve call can receive both EPSPs and IPSPs at the same time. The likelihood of the cell firing is therefore determined by adding up excitatory and inhibitory synaptic input.