05 Neurons and Spinal Cord Flashcards

1
Q

What are the arrows pointing to on the motor neuron?

A

Synaptic input terminals on dendrites

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2
Q

Around all axons and thier sheaths is a connective tissue layer called ____.

How does it act?

A

Endoneurium.

Acts as a electrical insulator.

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3
Q

Neurons are ____ ____ cells and are supported by ____ cells.

A

electrically conductive; glial cells

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4
Q

signals called ___ ___ travel like rolling waves down the lenths of neurons from one end of the cell to the other.

A

action potentials

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5
Q

In an action potential, Na+ goes ___ and K- ___ the cell.

A

Na+ ions go into the cell

K- ions leave the cell.

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6
Q

An action potential stops when it reaches a ___ ____ causing ____ to be released.

A

chemical synapse; neurotransmitter

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7
Q

What are the three neuron types?

A

Sensory Neuron

Interneuron

Motor Neuron

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8
Q

Which neuron type directly receives the stimulation/input?

A

Sensory

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9
Q

Which Neuron type is non-motor, and non-sensory?

A

Interneuron

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10
Q

Which neuron type diectly stimulates a muscle cell or gland?

A

Motor Neuron

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11
Q

Where is the conducting zone?

A

Axon

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12
Q

Where is the output zone?

A

Axon terminals

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13
Q

Where is the input zone?

A

Typically dendrite tips.

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14
Q

What are the numbered parts of the chemical synapse?

A
  1. Neurotransmitter
  2. Neurotransmitter Receptors
  3. The synapse
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15
Q

Action potentials can run more than one way in the axon? T or F

A

False. AP’s can only run one way.

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16
Q

A nerve is a bundle of ____

17
Q

Name the three types of CT sheaths

A
  1. Endoneurium
  2. Perineurium
  3. Epineurium
18
Q

Pia mater, arachnoid mater and dura mater make up the ___.

19
Q

Spinal nerves from C1 - C7 are named for the vertebra ___ them

20
Q

Where is spinal nerve C8 located? Becuase of C8 the nerves remainig are named for the vertebra ___ them.

A

between C7 and T1

above

21
Q

Label parts 1-5

A
  1. Sensory Nerve
  2. Dorsal sensory ganglion
  3. Spinal nerve
  4. White mater
  5. Gray mater
22
Q

Label the parts of the meninges

A
  1. Arachnoid mater
  2. Dura mater
  3. Pia mater
23
Q

Label 1 - 3

A
  1. Dural sensory ganglion
  2. spinal nerve
  3. sympathetic chain gland
24
Q

Name the 4 plexuses

A
  1. cervical
  2. brachial
  3. lumbar
  4. sacral
25
What wraps their myelin sheaths around the axon?
Schwan cells
26
Ions cannot get through the sheath - they can only make action potentials at gaps between sheaths called ____ \_\_ \_\_\_\_.
Nodes of Renvier
27
what is the name of the special synapse between a motor neuron axon terminal and a skeletal muscle cell?
Neuromuscular junction
28
What is shown in the slide
motor neurons
29
Identify F, En, P and E in the slide
F - Fasicle En - Endoneurium P - Perineurium E - Epineurium
30
Identify the arrowed features of the slide
Axon Myelin sheath Node of Ranvier
31
Identify the regions shown
1. White mater 2. Gray mater
32
Identify the parts of the spinal cord and meninges
1. Dura mater 2. Arachnoid mater 3. Cerebral spinal fluid 4. Pia mater
33
What are the structures shown?
Sensory dendrites / input terminals