The nervous system - Functions & structure of the nervous system - ch 12

Question 1

Name 4 important roles of the nervous system?

Answer 1

1. co-ordinating body functions
2. regulating body functions
3. communicating within and between the brain, spinal
   cord and all other parts of the body
4. Interpret stimuli from the external environment so
   the body can respond accordingly

Question 2

What other system does the nervous system work in association with?

Answer 2

The endocrine system

Question 3

The nervous system works in association with the endocrine system to maintain what condition???

Answer 3

homeostasis, the body’s internal state even in changing external environments.

Question 4

Name the network of specialised cells within the nervous system?

Answer 4

Neurons

Question 5

What is the role of these neurons?

Answer 5

signals move between the brain and body via these neural networks

Question 6

Name 2 divisions the nervous system has?

Answer 6

1. Central nervous system

2. Peripheral nervous system

Question 7

What does the central nervous system consist of?

Answer 7

1. brain

2. spinal cord

Question 8

What is the role of the CNS - central nervous system?

Answer 8

The central nervous system consists of the brain and the spinal cord
These structures serve as the main processing centres for the rest of the nervous system, controlling the operations of the body

Question 9

Do nerve impulses originate and or teminate in the CNS?

Answer 9

They either originate or terminate in the CNS. Not both.

Question 10

Name 3 roles that the CNS is responsible for?

Answer 10

1. Processing sensations and thoughts using information gathered from sensory receptors throughout the body
2. Sends messages to the rest of the body to control movement, actions and responses to the environment
3. The communication in the CNS which occurs through the neurons

Question 11

Name the protective barrier around the organs of the CNS, including the skull and bones of the spine membrous tissues?

Answer 11

meninges

Question 12

How many layers of the meninges

Answer 12

3

Question 13

Name the outer most toughest layer of the meninges?

Answer 13

dura mater which lines the skull and covers the brain and spinal cord.

Question 14

Name the middle layer of the meninges?

Answer 14

arachnoid mater ( sometimes called arachnoid membrane)

Question 15

Describe the arachnoid mater?

Answer 15

delicate, web-like membrane attached to the inside of the dura and surrounds the brain and spinal cord

Question 16

Name the inner most layer of the meninges?

Answer 16

pia mater which is richly supplied with blood vessels. It is attached firmly to the brain

Question 17

Name the space between the dura mater and the arachnoid?

Answer 17

subdural space

Question 18

Name the region between the arachnoid and pia mater

Answer 18

subarachnoid space

Question 19

What is the subarachnoid space filled with?

Answer 19

cerebrospinal fluid (CSF)

Question 20

What other body part is surrounded by CSF and meninges?

Answer 20

spinal cord