neurones Flashcards

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1
Q

What is the nervous pathway

A

Receptor -> sensory neuron -> relay neuron at the CNS -> motor neuron -> effector

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2
Q

What is a dendron

A

Sends impulses to the cell body

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3
Q

What is a cell body

A

Releases neurotransmitters and contains a nucleus

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4
Q

What is the axon

A

Sends impulses away from the cell body

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5
Q

What is the myelin sheath

A

Lipids that insulate the axon and increase speed of transmission

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6
Q

what are sensory neurons responsible for

A

transmit nerve impulses from receptors to the CNS

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7
Q

what are motor neurons responsible for

A

transmit nerve impulses from the CNS to effectors

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8
Q

what are relay neurons responsible for

A

transmit nerve impulses between sensory and motor neurons

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9
Q

what is a stimulus detected by

A

receptor cells

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10
Q

what happens when a stimulus is detected

A

a nerve impulse is sent down a sensory neuron

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11
Q

what happens when a nerve impulse reaches the end of a neuron

A

neurotransmitters take the message along to the next neuron

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12
Q

what is a transducer

A

converts the energy of a stimulus into electrical energy

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13
Q

what are the specific features of sensory neurons

A

one long dendron which carriers the action potential to the cell body

cell body in the middle of the neuron, and a short axon carrying action potential to the CNS

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14
Q

what are the specific features of motor neurons

A

cell body is located in the CNS, long axon to carry action potential to effector

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15
Q

what are the specific features of a relay neuron

A

many short dendrites and a short axon to send communications from the sensory neuron to the motor neuron

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