Neuromuscular junction

Question 1

What are the two types of neurotransmitters

Answer 1

excitatory and inhibitory

Question 2

What do excitatory neurotransmitters do

Answer 2

start impulses in neighbouring neurons or the contraction of muscles

Question 3

What do inhibitory neurotransmitters do

Answer 3

prevent nerve impulses from happening in adjacent cells

Question 4

What is acetylcholine

Answer 4

most common excitatory and inhibitory, stimulates skeletal muscles but inhibits cardiac muscles. as with most neurotransmitters it is broken down by an enzyme called cholinesterase released from the presynaptic neuron so that the effect of the neurotransmitter is not prolonged

Question 5

What is noradrenaline/norepinephrine

Answer 5

Mainly excitatory. compliments the actions of the hormone adrenaline/epinephrine. important part of the sympathetic nervous system which prepares the body for fight or flight response.

Question 6

What are endorphins

Answer 6

act as natural painkillers in synapses in the brain: also effects emotional areas of the brain. generall inhibitory

Question 7

What is dopamine

Answer 7

generally excitatory. elevates mood and is linked to sensations of pleasure (such as eating) and brain synapses in control of body movements.

Question 8

What is serotonin

Answer 8

involved in alertness, sleepiness, sensory perception, thermoregulation and mood. generally inhibitory