Central And Peripheral Nervous Systems

Question 1

Define the fissure.

Answer 1

What separates the brain (the gap).

Question 2

Define CNS.

Answer 2

Includes the brain & spinal cord (receives, interprets, send signals)

Question 3

Define PNS.

Answer 3

Encompasses nerves outside the brain and spinal cord (using motor neuron to send information to CNS).

Question 4

What are the similarities between the CNS & PNS

Answer 4

They’re made of several smaller parts.

Question 5

How many neurons does the brain have?

Answer 5

100 billion neurons.

Question 6

What are the 3 layers of connective tissues called?

Answer 6

Meninges.

Question 7

What’s between the layers and its purpose?

Answer 7

Between the layers there’s a fluid that protects the brain from not hitting against the skull.

Question 8

List all the brain 3 main structures.

Answer 8

1. Cerebrum (interprets signals).
2. Cerebellum (controls movement).
3. Brainstem (connects the brain to the spinal cord and controls basic everyday tasks (such as breathing)).

Question 9

TRUE OR FALSE: is the brain a receptor.

Answer 9

True.

Question 10

What’s the outer layer of the cerebrum called?

Answer 10

The cerebral cortex.

Question 11

What’s the cerebral cortex function?

Answer 11

Interpreting and processing different type of information to the sensory organs.

Question 12

TRUE OR FALSE: the hemispheres of the cerebrum controls opposite side of the body.
EXPLAIN WHY?

Answer 12

True,
when the spinal cord sends signals to the brain it crosses over the opposite hemisphere.

Question 13

What’s the function of the cerebellum?

Answer 13

It plans how much your arm need to move in order to do a curtain task, and to send information to the motor neuron to send it to the arm.

Question 14

List all the brainstem major parts.

Answer 14

1. The mid brain (small reflexes like the size of pupils).
2. The pons (regulates breathing).
3. The medulla oblongata (controls the brain to the spinal cord and controls functions such as swallowing and vomiting)z

Question 15

List all the spinal column parts.

Answer 15

1. Vertebrate.
2. Fluid.
3. Meninges.
4. Spinal cord.

Question 16

Where’s the pons located?

Answer 16

In the middle of the brain a little bit down in a shape of a circle.

Question 17

Where’s the medulla oblongata located?

Answer 17

Besides the pons.

Question 18

Define the spinal cord.

Answer 18

The spinal cord is like a rope-like bundle of neurons that connects the brain to the nerves and deliver messages to the proper muscle.

Question 19

What will happen if the spinal cord was damaged?

Answer 19

It will result in paralysis.

Question 20

Define the reflex arc.

Answer 20

A neural pathway that controls a reflex.

Question 21

What’s the 1st step of the reflex arc?

Answer 21

Receptor; picks up the sense.

Question 22

What’s the 2nd step of the reflex arc?

Answer 22

Senses picked from the receptor gets sent to the sensory neuron; sends electrical impulses.

Question 23

What’s the 3rd step of the reflex arc?

Answer 23

After the electrical impulses gets sent the Co-ordinator (green matter) works as a connector.

Question 24

What’s the 4th step of the reflex arc?

Answer 24

The motor neuron passes the electrical impulses received from the green matter.

Question 25

What’s the last step of the reflex arc?

Answer 25

The action received from the motor neuron gets sent to the target (muscle/gland) to produce a response.

Question 26

List the two parts of the PNS.

Answer 26

1. Somatic Nervous System: regulates all the movements & connects the CNS to target organs (voluntary).
2. Automatic Nervous System Controls automatic functions like digesting food (involuntary).

Question 27

List the two parts of the ANS.

Answer 27

1. Sympathetic Nervous System (controls actions and stress levels).
2. Parasympathetic Nervous System (controls clam levels and relaxation).