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Flashcards in Nervous System Deck (115)
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1

Name the 2 main parts of the Nervous system and what each consists of.

Central Nervous System - Brain & Spinal cord
Peripheral Nervous system - Affector & effector neurones

2

List the 3 parts of a neuron.

- Axon
- Cell body
- Dendrite(s)

3

The axon carries information _____ from the cell body.

Away.

4

Dendrites carry information ____ the cell body.

To.

5

Name the 2 neuron types found in the spinal cord.

Ascending & Descending.

6

What is the Vertebral foramen?

The vertical tunnel that runs through each vertebra.

7

When the vertebrae are stacked on top of each other to form the spine, the vertebral foramen form the what?

Vertebral canal.

8

Where is the spinal cord contained within?

Vertebral canal.

9

True or false? Throughout its length, the spinal cord's cross sectional appearance changes.

False. The spinal cord has a standard cross sectional appearance throughout its length.

10

The outer section of the spinal cord is formed of white matter which consists of what?

It consists of axons of neurons that form ascending or descending pathways.

11

The inner section of the spinal cord is formed from grey matter which consists of what?

The inner section is where cell bodies of neurons are located and is where synapses occur between these cell bodies, their dendrites and the axons of other neurons.

12

Where do nerves from the body enter the spinal cord through?

Dorsal roots.

13

What do nerves exit the spinal cord through?

Ventral horn (ventral root).

14

Name the 2 divisions of the Peripheral Nervous system.

Somatic & Autonomic

15

In the somatic nervous system where do descending motor tracts from the cerebral cortex mostly run?

In the lateral corticospinal tract.

16

In the somatic nervous system where do sensory neurons carrying fine touch and proprioception from the limbs run?

In the dorsal columns.

17

In the somatic nervous system where do sensory neurons carrying pain and temperature fibres run?

In the anterolateral fasciculus

18

Where do autonomic nerves run?

Alongside the spinal cord in a collection of ganglia.

19

At what vertebral level does the spinal cord end in adults?

L1

20

At what vertebral level does the spinal cord end in children?

L3

21

Nerves that travel to the CNS are called what?

Affector neurons.

22

Nerves that travel from the CNS are called what?

Effector neurons.

23

Which division of the PNS deals with the 'subconscious' control of our bodies (temperature control, secretions etc.)?

Autonomic Nervous system.

24

The autonomic nervous system can be divided into what 2 systems?

Sympathetic & Parasympathetic systems.

25

True or false? The autonomic nervous system reaches its target via a single neuron.

False. The autonomic system has pre and post-ganglionic neurons.

26

Which section of the autonomic nervous system initiates the 'fight or flight' response?

The sympathetic nervous system.

27

Where are sympathetic cell bodies present?

In the thoracic and lumbar spinal cord segments.

28

Where do parasympathetic neurons arise from?

From the cranial nerves or from the lumbo-sacral spinal cord.

29

Which section of the autonomic nervous system initiates the 'rest and digest' response?

The parasympathetic nervous system.

30

Where are parasympathetic ganglia located?

Close to the target organ.