Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Science > the nervous system > Flashcards

the nervous system Flashcards

(57 cards)

Start Studying
1
Q

What is the role of the Nervous System?

A

Coordinates all the functions of the organism so that they run in harmony.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How does the Nervous System contribute to blood circulation?

A

Regularly pumps blood circulating in our blood vessels.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What role does the Nervous System play in digestion?

A

Digests our meal.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How does the Nervous System help maintain posture?

A

Some of our muscles are contracted to maintain our posture.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is one action the Nervous System controls to moisten our eyes?

A

We blink several times a minute.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the main functions of the Nervous System?

A

Receives, processes, stores, and transmits information.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does the Nervous System receive information?

A

Through receptors scattered throughout the body.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does the Nervous System do with the information it receives?

A

Transmits this information through nerves to treatment centers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Where is information analyzed in the Nervous System?

A

In treatment centers such as the brain.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does the Nervous System do with stored information?

A

Stores information in order to reuse it.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Fill in the blank: The Nervous System transmits information to different parts of the body for _______.

A

action to take place.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is a neuron?

A

Nervous cells that allow the reception and transmission of information

Functional unit of the nervous system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How many neurons does the average human have?

A

100 billion

This is an estimate of the average number of neurons in a human brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is a stimulus?

A

Anything that can be perceived by a living organism that can trigger a reaction

Examples include sound, light, heat, electrical shock, odours, and hormones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does a neuron do?

A

1) Detect stimuli 2) Send nerve impulses

Neurons capture stimuli, transform them into nervous impulses, and transmit these impulses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a nerve impulse?

A

An electrical signal transmitted by a neuron

It is a message of an electrical nature propagating in neurons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Fill in the blank: A _______ is an electrical signal transmitted by a neuron.

A

nerve impulse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

True or False: The role of neurons includes capturing stimuli.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What are the three main roles of neurons?

A

1) Capture stimuli 2) Transform them into nervous impulses 3) Transmit these nervous impulses

Each role is essential for the functioning of the nervous system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is the junction between 2 neurons that allows the transmission of nerve impulses called?

A

Synapse

The synapse is where neurotransmitters facilitate communication between neurons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What are the chemicals secreted by the termini in the thin space that separates 2 neurons?

A

Neurotransmitters

Neurotransmitters are crucial for the rapid transmission of signals between neurons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the speed of a nerve impulse?

A

430 km/h

This rapid speed ensures quick communication within the nervous system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What structures do the axons of neurons gather to form?

Study These Flashcards
A

Nerves

Nerves are vital for transmitting information in the nervous system.

24
Q

What components make up a nerve?

Study These Flashcards
A

Axons, protective tissue, and blood vessels

These components work together to facilitate the transmission of information.

25
True or False: A nerve is only made up of axons.
False ## Footnote A nerve also includes protective tissue and blood vessels.
26
Fill in the blank: The rapid movement of neurotransmitters ensures the rapid exchange of information between different parts of the _______.
organism ## Footnote The efficiency of neurotransmitters supports overall bodily functions.
27
cWhat does the Peripheral Nervous System (PNS) connect?
Different parts of the body to the central nervous system ## Footnote The PNS includes all nerve fibers not part of the spinal cord and brain.
28
How many types of nerves are in the PNS?
Three types: Sensory, Motor, and Mixed ## Footnote Mixed nerves contain both sensory and motor fibers.
29
What are sensory receptors responsible for?
Receiving stimuli from inside and outside of the body and turning it into nerve impulses ## Footnote Found mostly in sensory organs like eyes, ears, skin, nose, and tongue.
30
Where are sensory receptors primarily located?
In sensory organs, such as eyes, ears, skin, nose, and tongue ## Footnote Other receptors located inside the body capture information from internal organs.
31
What is the function of sensory nerves?
Transmit information in the form of nerve impulses from sensory receptors to the central nervous system ## Footnote They receive impulses from both sensory and internal organs.
32
Fill in the blank: The PNS includes all the nerves that leave the _______ or brain.
spinal cord
33
True or False: The PNS is composed only of motor nerves.
False ## Footnote The PNS includes sensory, motor, and mixed nerves.
34
What type of information do sensory nerves receive?
Impulses from sensory organs and internal organs
35
What do motor nerves transmit?
Impulses from the central nervous system to the muscles and glands ## Footnote Motor nerves are responsible for producing voluntary and involuntary movements.
36
What is the central nervous system (CNS) composed of?
The brain and the spinal cord ## Footnote The CNS includes the cerebrum, cerebellum, and brain stem.
37
Where is the central nervous system located?
In the cranium (skull) ## Footnote The brain is protected by the cranium and meninges.
38
How does the central nervous system communicate with the body?
Through 12 pairs of cranial nerves ## Footnote These nerves transmit information to and from the CNS.
39
What is one example of a motor nerve reaction?
The pupil of the eye contracts when the light is too intense ## Footnote This reaction is an involuntary response to sensory input.
40
What are the main components of the brain?
* Cerebrum * Cerebellum * Brain stem ## Footnote These components play various roles in processing information and coordinating movement.
41
What is the role of the central nervous system?
To receive, interpret information from the senses, and develop a motor response ## Footnote This response is then sent to the peripheral nervous system.
42
Fill in the blank: The central nervous system consists of the _______ and the spinal cord.
brain
43
True or False: The central nervous system only processes voluntary movements.
False ## Footnote The CNS is involved in both voluntary and involuntary movements.
44
What is the definition of the spinal cord?
The SPINAL CORD is a nervous system organ that carries information from the various parts of the body to the brain and is also the reflex center. ## Footnote It transmits impulses between the brain and motor/sensory nerves.
45
How many pairs of nerves are attached to the spinal cord?
31 pairs of spinal nerves. ## Footnote These nerves facilitate communication between the spinal cord and the body.
46
What is the main function of the spinal cord?
To transmit the impulse of the brain to the motor nerves and sensory nerves to the brain. ## Footnote It acts as a communication highway for the nervous system.
47
What protects the spinal cord?
The meninges (protective membranes) and the vertebrae (bones around the spinal column). ## Footnote These structures provide physical protection to the spinal cord.
48
What is a reflex?
A rapid and involuntary reaction to a stimulus. ## Footnote Examples include reacting to a burn or blinking.
49
What is the role of the spinal cord in reflex actions?
The spinal cord intercepts the message from sensory organs and redirects it to the muscles needed for a response. ## Footnote The brain analyzes the event after the reaction has occurred.
50
What is a reflex arc?
The path taken by a nerve impulse during a reflex, which is shorter than normal to allow for immediate action. ## Footnote This is crucial in emergency situations.
51
What functions does the cerebrum control?
Voluntary movements, intelligence, emotions, and interpreting our senses. ## Footnote It is divided into two hemispheres.
52
Which hemisphere of the cerebrum controls the right side of the body?
The left hemisphere. ## Footnote Each hemisphere controls the opposite side of the body.
53
What are the two layers of the cerebrum?
The outer layer is the cerebral cortex (grey matter) and the inner layer is white matter. ## Footnote Grey matter is involved in processing, while white matter is responsible for complex functions.
54
What is the function of the cerebellum?
It is the center of balance and movement coordination, allowing for both simple and complex tasks. ## Footnote It communicates constantly with the rest of the body.
55
What disorders can arise from issues with the cerebellum?
Motion sickness and vertigo. ## Footnote These disorders affect balance and spatial orientation.
56
What does the brain stem control?
Internal stimuli and involuntary movements associated with the digestive, respiratory, and circulatory systems. ## Footnote It is vital for maintaining essential life functions.
57
Fill in the blank: The outer layer of the cerebrum is called the _______.
cerebral cortex. ## Footnote This layer is primarily composed of grey matter.

Science (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions