Nervous System

Question 1

What is Saltatory?

Answer 1

Impluse jumping along the Axon of Neurone

Question 2

What is the repratory period?

Answer 2

No impluse can go past - Recovery period after impluse sent.

Sodium potassium pump regulates

Question 3

What is the difference between an axon & a Dendron?

Answer 3

Dendron recieves the information from the last neurone an takes it to cell body and the Axon takes the impluse away from the cell body.

Question 4

What is a motor end plate?

Answer 4

The end of neurone before impluse jumps to the next neurone

Question 5

Oligodendrocytes are found in the CNS, their function is too?

Answer 5

Insulates the neurone, allow Faster Impluse

Question 6

Microgila are found in the CNS thier function is to?

Answer 6

Eat bacteria & dead tissue - Phagocyte

Question 7

Astrocytes are found in the CNS thier function is to?

Answer 7

Support & Blood Brain Barrier

Question 8

Scwhann Cells are found in the PNS their function is to?

Answer 8

Enable damages Axons to Regenerate

Question 9

Sensory receptors in the somatic nervous system include?

Answer 9

Pacinian

Meissner’s

Krause’s End Bulb

Free Nerve Endings

Merkle Disks

Question 10

Effectors in the somatic system include?

Answer 10

Skeletal Muscles

Question 11

Sensory Receptors in the Autonomic system include?

Answer 11

Raffini’s Corpurse

Golgi Tendon Organs

Muscle Spindles

Question 12

Effectors in the autonomic system include?

Answer 12

Glands

Cardiac

Smooth Muscle

Question 13

List the 5 steps to Reflex arc?

Answer 13

1. Sensory Receptor Activated
2. Sensory Receptor Transmition to the CNS via Sensory Neurone
3. Intergration in the C.N.S
4. Motor Impluse Transmission from CNS
5. The Effectors carry out the Response

Question 14

Thalamus Function?

Answer 14

Directs messages to the right side of brain

Question 15

Cerebral Cortex Function

Answer 15

Support Membrane, outer edge of brain

Question 16

Cerebrum Function

Answer 16

Thinking & Learning

Consciousness

Question 17

Pons function

Answer 17

Bridge Connection to the cerebellum

Question 18

Mid brain function

Answer 18

Controls Eye Movement

Question 19

Hypotalamus Function

Answer 19

Area of Homeostatsis e.g Thirst, Hunger

Controls endocrine through the Pituitary Gland

Question 20

The function of the Medulla Oblongata

Answer 20

Controls Vital Centres

such as Respiratory, Cardiac, Coughing, sneezing & Swallowing

Question 21

Function of Cerebellum is?

Answer 21

To ensure movements are smooth, controls fine motor skills.

Question 22

How many Cervical Spinal Nerves are there? Where do they supply?

Answer 22

8 Cervical Nerves

supply the

Muscles

Skin of Neck

Shoulders & Arms

Question 23

How many Thorasaic Spinal Nerves are there? Where do they suppy

Answer 23

12 Thorasaic Nerves

Supply the

Chest

Upper Back

Viscorals

Question 24

How many Lumbar nerves & Where do they supply?

Answer 24

5 Lumber nerves

supply the

Abdomen, Back & Femeur

Question 25

How many Sacral Spinal Nerves are there? Where do they Supply?

Answer 25

5 Sacral Nerves Supply the Buttocks Thigh Lower Digestive System

Question 26

There is 1 Coccygeal Spinial Nerve, Where does this supply

Answer 26

Skin of peritoreal & the Lower Buttocks

Question 27

List 5 things the Sympathetic Nervous system does

Answer 27

Increase Heart Rate Increase blood Supply to the heart muscle Decreases digestive system Decreased Urine production Increase Respiration Immune System Decreases Dialation of pupils

Question 28

List 5 thins the parasympathetic nervous system does

Answer 28

Decreases Respiratory Increases Digeston & Nutrients Decreases Heart Rate Increases Urine Production Constriction of Pupils

Question 29

From the Spinial Cord out to the bone list all the layersof the Spine

Answer 29

Gray Matter White MAtter Pia Mata Cereberal Fluid - Sub Archiniod Archiniod Dura Mata Epidural Fat Layer Bone

Question 30

from the Bone to the centre Spinal Cord what are the correct order of layers in the spine?

Answer 30

Bone Epidural Fat Layer Dura Mata Archiniod Cerebral Fluid - Sub Archiniod Pia Mata White Matter Gray Matter

Question 31

**Sensory** **(Afferent)** info is picked up by a **Receptor** that send an impluse along a **Sensory Neurone** to the CNS. Here the infomation is **processed** and a Response is made. A M**otor (Efferent)** impulse is sent along a **Motor Neurone** to an **Effectors.**

Answer 31

**Now fill in the Blanks** _ _ (afferent) info is picked up by a_ _ that sends an impluse along a_ _ neurone to the CNS. Here the information is_ _ and a response is made. A _ _ (Efferent) impluse is sent along a_ _ neurone to an _ ._

Question 32

What is the resting membrane maintained at?

Answer 32

-70

Question 33

What is the ratio of the sodium potassium pump?

Answer 33

**3 Na out & 2 k in** Resting potential -70 Thershold -55 Action Potential Point of Impluse +35

Question 34

When the soduim potassium pump is at resting potential what else is inside the axon?

Answer 34

Plasma Protiens

Question 35

What is a chemical that opens a chemical gate & Na (Sodium enters) enters the nerone?

Answer 35

Neurotransmitter

Question 36

Whne thershhold is reached at -50 an volt gates open to let the sodin taking the voltage to?

Answer 36

+35 Action Potential Impluse

Question 37

If a neurone is myelinated the impluse will jump what is this called?

Answer 37

Saltatory Conduction

Question 38

At the axon terminals the neurotransmitter is released into the gap to enable the impulse to pass to another neurone. what is this gap called?

Answer 38

Synapse

Question 39

List all the parts of a neurone and think of where they are postioned

Answer 39

Dendreites (Dendron) Cell Body Nucleous Axon Myelin Sheath (Schwann Cell) Nodes of Ranvier Terminal Branches & Buttons

Question 40

Glands Cardiac & Smooth Muscle are all?

Answer 40

Effectors in the Autonomic System