Lesson One

Question 1

Within a neuron, communication results from…

Answer 1

An Action Potential

Question 2

Which sentence is correct:
a. Neural diversity is present only in the ANS
b. Neural diversity is present only in the CNS
c. Neural diversity reflects function
d. Neural diversity reflects the length of the axon

Answer 2

c. Neural diversity reflects function

Question 3

Between neurons, communication results from:

Answer 3

Chemical Synapses

Question 4

Division of the Autonomic Nervous System (ANS) that calms the body, conserving its energy, is called…

Answer 4

Parasympathetic Nervous System

Question 5

According to the neuron doctrine:
a. All cells are important for signal processing
b. Neurons are not signal-processing devices
c. Neuronal systems are the basic unit of the nervous system
d. Neurons are the basic unit of the nervous system

Answer 5

d. Neurons are the basic unit of the nervous system

Question 6

The myotatic spinal reflex (aka knee jerk reflex) is an example of…

Answer 6

Neural Circuit

Question 7

Which sentence is correct:
a. Action potentials are blips of electrical activity that last about 2-3 milliseconds.
b. Action potentials do not vary in frequency and pattering.
c. Action potentials are electrically different.
d. None of the above

Answer 7

a. Action potentials are blips of electrical activity that last about 2-3 milliseconds.

Question 8

The part of a neuron which receives messages from other neurons is called:

Answer 8

Dendrites

Question 9

Neural circuits are defined by:
a. A sensory neuron linked to a motor neuron
b. Interconnected neurons
c. Several electrical synapses
d. Sensory neurons

Answer 9

b. Interconnected neurons

Question 10

All of the nerves that relay information between the brain and the rest of the body are part of:
a. Central Nervous System (CNS)
b. Central Nervous Circuit (CNC)
c. Peripheral Nervous System (PNS)
d. Autonomic Nervous System (ANS)

Answer 10

c. Peripheral Nervous System (PNS)

Question 11

What are the cells that make up the nervous system?

Answer 11

Neurons

Question 12

What is the role of the dendrites?

Answer 12

Recieve messages from other cells

Question 13

What is the role of the cell body (Soma)?

Answer 13

The cell’s life support center

Question 14

What is the purpose of the axon?

Answer 14

Passes messages away from the cell body to other neurons, muscles or gland

Question 15

What is the purpose of the terminal branches of the axon?

Answer 15

Form junctions with other cells

Question 16

What is the purpose of myelin sheath?

Answer 16

Covers the axon of some neurons and helps speed neural impulses

Question 17

What direction does the nerve impulse (action potential) travel along the axon?

Answer 17

From the direction of the soma/dendrites to the terminal branches

Question 18

What is the cell that wraps itself tightly around the axon many times forming the myelin sheath?

Answer 18

Schwann cell

Question 19

What does neural diversity reflect?

Answer 19

Function

Question 20

How does communication occur within a neuron?

Answer 20

Action Potentials

Question 21

Describe/define an action potential:

Answer 21

A neural impulse/A brief electrical charge - carries information along the axon of a neutron

Question 22

What area of the neuron is an action potential conducted/transmitted?

Answer 22

From the dendrites

Question 23

Action potentials are electrically identical - true or false?

Answer 23

True

Question 24

What is one way in which an action potentials vary?

Answer 24

Frequency and patterning

Question 25

Action potentials are not involved in sensory processing - true or false?

Answer 25

Fasle

Question 26

What is the threshold of an action potential?

Answer 26

The minimum membrane potential the intensity of a signal must meet for an action potential to fire

Question 27

Do excitatory signals increase or decrease the membrane potential voltage?

Answer 27

Increase

Question 28

What is the all-or-none response?

Answer 28

An action potential either fires or does not

Question 29

How does communication occur between neuron's?

Answer 29

Synapses

Question 30

Are chemical or electrical synapses more common in the human nervous system?

Answer 30

Chemichal

Question 31

Chemical synapses use neurotransmitters - true or false?

Answer 31

True

Question 32

What is the difference between the presynaptic neuron and the postsynaptic neuron?

Answer 32

The presynaptic neuron transmits the neural information - the postsynaptic neuron receives the information

Question 33

What are neuron circuits?

Answer 33

Interconnected neurons

Question 34

What is the Myotatic spinal reflex (‘knee jerk’) an example of?

Answer 34

A neural circuit

Question 35

What is the role of inhibition?

Answer 35

Inhibitory signals prevent/reduce the likelihood of an action potential firing

Question 36

What three aspects do neural circuits function depend on?

Answer 36

How the neurons are connected - How strong the connections (synapses) are - Whether the connections (synapses) are excitatory or inhibitory

Question 37

What changes in a neural circuit due to the changes in synaptic strength?

Answer 37

The function of a neural circuit

Question 38

Is Divergence Few to Many or Many to Few

Answer 38

Few to Many

Question 39

Is Convergence Few to Many or Many to Few

Answer 39

Many to Few

Question 40

What is the nervous system composed of and what is it's function?

Answer 40

All the nerve cells and is the body's communication system

Question 41

What is the Central Nervous System composed of?

Answer 41

The Brain The Spinal Cord

Question 42

What is the purpose of the Peripheral Nervous System?

Answer 42

The nerves that relay information from the CNS to the rest of the body

Question 43

What is grey matter composed of?

Answer 43

Cell bodies of neurons

Question 44

What is white matter composed of?

Answer 44

Axons of neurons

Question 45

What does the Somatic Nervous System control?

Answer 45

Controls the body's skeletal muscles

Question 46

What does the Autonomic Nervous System control?

Answer 46

The glands and other muscles

Question 47

Nerves do not contain axons - true or false?

Answer 47

False

Question 48

Nerves are part of the Peripheral Nervous System - True or False?

Answer 48

True

Question 49

What do nerves connect?

Answer 49

The muscles, glands and sense organs to the CNS

Question 50

What division of the Autonomic Nervous System is responsible for arousal/fight or flight?

Answer 50

Sympathetic Nervous System

Question 51

What is the purpose of arousal in the sympathetic nervous system?

Answer 51

Mobalising energy for stressful situation

Question 52

What division of the Autonomic Nervous System is responsible for calming/rest and digest

Answer 52

Parasympathetic Nervous System

Question 53

What is the purpose of calming in parasympathetic nervous system?

Answer 53

Conserving energy

Question 54

The parasympathetic and sympathetic nervous system control the same glands and muscles - true or false?

Answer 54

True

Question 55

How do signals travel within a neuron? a) Chemically via synapses b) Electrically via action potentials c) Biochemically via hormones

Answer 55

B) Electrically via action potentials

Question 56

The cell body of a neuron is called? a) Soma b) Dendrites c) Axon

Answer 56

a) Soma

Question 57

THE PARASYMPATIC NERVOUS SYSTEM a) Division of the ANS that alerts the body b) Division of the CNS that calms the body c) Division of the ANS that calms the body

Answer 57

c) Division of the ANS that calms the body