05 Neurons and Spinal Cord

Question 1

What are the arrows pointing to on the motor neuron?

Answer 1

Synaptic input terminals on dendrites

Question 2

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

How does it act?

Answer 2

Endoneurium.

Acts as a electrical insulator.

Question 3

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

Answer 3

electrically conductive; glial cells

Question 4

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

Answer 4

action potentials

Question 5

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

Answer 5

Na+ ions go into the cell

K- ions leave the cell.

Question 6

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

Answer 6

chemical synapse; neurotransmitter

Question 7

What are the three neuron types?

Answer 7

Sensory Neuron

Interneuron

Motor Neuron

Question 8

Which neuron type directly receives the stimulation/input?

Answer 8

Sensory

Question 9

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

Answer 9

Interneuron

Question 10

Which neuron type diectly stimulates a muscle cell or gland?

Answer 10

Motor Neuron

Question 11

Where is the conducting zone?

Answer 11

Axon

Question 12

Where is the output zone?

Answer 12

Axon terminals

Question 13

Where is the input zone?

Answer 13

Typically dendrite tips.

Question 14

What are the numbered parts of the chemical synapse?

Answer 14

1. Neurotransmitter
2. Neurotransmitter Receptors
3. The synapse

Question 15

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

Answer 15

False. AP’s can only run one way.

Question 16

A nerve is a bundle of ____

Answer 16

axons

Question 17

Name the three types of CT sheaths

Answer 17

1. Endoneurium
2. Perineurium
3. Epineurium

Question 18

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

Answer 18

Meninges

Question 19

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

Answer 19

below

Question 20

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

Answer 20

between C7 and T1

above

Question 21

Label parts 1-5

Answer 21

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

Question 22

Label the parts of the meninges

Answer 22

1. Arachnoid mater
2. Dura mater
3. Pia mater

Question 23

Label 1 - 3

Answer 23

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

Question 24

Name the 4 plexuses

Answer 24

1. cervical
2. brachial
3. lumbar
4. sacral

Question 25

What wraps their myelin sheaths around the axon?

Answer 25

Schwan cells

Question 26

Ions cannot get through the sheath - they can only make action potentials at gaps between sheaths called ____ __ ____.

Answer 26

Nodes of Renvier

Question 27

what is the name of the special synapse between a motor neuron axon terminal and a skeletal muscle cell?

Answer 27

Neuromuscular junction

Question 28

What is shown in the slide

Answer 28

motor neurons

Question 29

Identify F, En, P and E in the slide

Answer 29

F - Fasicle

En - Endoneurium

P - Perineurium

E - Epineurium

Question 30

Identify the arrowed features of the slide

Answer 30

Axon

Myelin sheath

Node of Ranvier

Question 31

Identify the regions shown

Answer 31

1. White mater
2. Gray mater

Question 32

Identify the parts of the spinal cord and meninges

Answer 32

1. Dura mater
2. Arachnoid mater
3. Cerebral spinal fluid
4. Pia mater

Question 33

What are the structures shown?

Answer 33

Sensory dendrites / input terminals