Biopsychology- neurons and synaptic transmission

Question 1

There are _______________ neutrons in the bervous system?

Answer 1

100 billion

Question 2

____ of the neurons are located in the brain

Answer 2

80%

Question 3

neurons comminucate both ______ and __________

Answer 3

Electrically and chemically

Question 4

What are the 3 types of neuron

Answer 4

• Motor
• Sensory
• Relay

Question 5

Sensory neurons carry messages from the ____ to the ____.

Answer 5

PNS

CNS

Question 6

Relay neurons connect the __________ to the ______ and the ______ neurons

Answer 6

Sensory and motor and relay neurons

Question 7

Motor neurons connec the CNS to the ________

Answer 7

EFFECTORS

Question 8

Examples of effectors

Answer 8

Muscles and glands

Question 9

_________ neurons have short axons and short dendrites

Answer 9

relay

Question 10

______ neurons have long axons and short dendrites

Answer 10

Motor

Question 11

______ neurons have short axons and long dendrites

Answer 11

Sensory

Question 12

Where does synaptic transmission take place?

Answer 12

Within a neuron / across a synaptic cleft (gap)

Question 13

The electrical impulse passed down an axon is known as?

Answer 13

Action potential

Question 14

when the action potential reaches the end of the axon what needs to happen? (STEP 2)

Answer 14

It must cross over the synaptic gap - from the presynaptic to the postsynaptic

Question 15

At the end of each neurons there are s_____ v_____ wih contain chemical messengers known as ________

Answer 15

Synaptic vesicle

neurotransmitter

Question 16

Once the action potential has reached the vesicles and the neurotransmitter has been released - what happens next?

Answer 16

cross the gap and bind to receptor sites on the postsynaptic cell

Question 17

Neurotrasimmtets d_________ acrosss a synpas and are a_________ by the next neuron in the chain and are tured back into a e________ _____.

Answer 17

diffuse
absorbed
electrical impulse

Question 18

Examples of neurotransmitter

Answer 18

GABBA

serotonin

Question 19

Neurotransmitters can either have an E____________ ir I______________ effect on the neigbouing neuron

Answer 19

Exiting

inhibiting

Question 20

Inhibition causes the next neuron to be ___________ and ____ liley to fire + eg

Answer 20

NEGATIVE
LESS
serotonin

Question 21

Excitation causes the next neuron to be ______ and ____ likely to fire + eg

Answer 21

positively
more
adrenaline

Question 22

What is summation?

Answer 22

Whether the postsynaptic neuron fires

Question 23

Explain the process of summation?

Answer 23

When the excitatory and inhibitory influences are summed and if the total is inhibitory = less likely and excitatory = more likely