Quiz On Brain And Nervous System
- 1.
What is it that allows the nervous system to send and receive messages the way it does?
- A.
The Brain
- B.
The Spinal Cord
- C.
Neurons
- D.
The ability to think and feel
Correct Answer
C. NeuronsExplanation
Neurons are what allow the messages to be sent from the outside world to the brain, and from the brain to the rest of your body... The brain controls nervous system, but remember there are instances, such as the reflex arc, where the nervous system can work without the brain!Rate this question:
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- 2.
What are the main components of the Central Nervous System? (You may check more than one box if more than one option applies).
- A.
Brain
- B.
Veins
- C.
Spinal cord
- D.
Muscles
- E.
Peripheral nerves
Correct Answer(s)
A. Brain
C. Spinal cordExplanation
The main components of the Central Nervous System are the brain and the spinal cord. These two structures are responsible for processing and transmitting information throughout the body. The brain controls various functions such as thinking, memory, and movement, while the spinal cord serves as a pathway for nerve signals between the brain and the rest of the body. The other options listed, including veins, muscles, and peripheral nerves, are not part of the Central Nervous System.Rate this question:
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- 3.
How do neurons send their signals from one to another
- A.
Through contact between the dendrites of one neuron and the axon branches of the next
- B.
Through neurotransmitting chemicals that float between the synapse space
- C.
Through electrochemical signals that pass from axon to axon
- D.
By an electrical current that is transmitted from the dendrite of the first neuron to the axon branch of the second neuron
Correct Answer
B. Through neurotransmitting chemicals that float between the synapse spaceExplanation
Remember that neurons transmit their impulse (which is an electrical current) via neurotransmitters (which are chemical that "activate" a neurons dendrites.Rate this question:
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- 4.
All actions that occur as a result of the nervous system are controlled by the brain
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Remember that the spinal cord can control some simple movements where that action needs to be very quick (like a reflex). An example of this is the flinch that happens when you touch something hot. In order to make the action as quick as possible, the spinal cord acts first, and the brain receive the message milliseconds later.Rate this question:
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- 5.
Sensory neurons carry impulses through the nervous system...
- A.
From the brain
- B.
To the brain
Correct Answer
B. To the brainExplanation
Sensory neurons take messages one way from the senses to the brain. This sensory information (such as hearing a loud bang!) is taken to the brain for processing, where messages may then be transmitted from the brain to the muscles to act (such as flinching away from the noise) through motor neurons.Rate this question:
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- 6.
The peripheral nervous system...
- A.
Branches off the brain and spinal cord and is responsible for muscle movement.
- B.
Is connected to the central nervous system and is responsible for gathering sensory information.
- C.
Responsible for collecting and acting on information that is interpreted by the brain.
- D.
Connects the central nervous system to the environment to gather sensory input and create motor output.
Correct Answer
D. Connects the central nervous system to the environment to gather sensory input and create motor output.Explanation
The peripheral nervous system connects the central nervous system to the environment to gather sensory input and create motor output. This means that it is responsible for transmitting information from the body's sensory receptors to the brain, as well as sending signals from the brain to the muscles to initiate movement. It acts as a communication network between the central nervous system and the rest of the body, allowing for the interpretation of sensory information and the execution of motor responses.Rate this question:
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- 7.
What is the most logical order of events for a Reflex Arc?
- A.
Action, sensory neuron, inter-neuron relay, motor neuron, stimulus
- B.
Stimulus, sensory neuron, spinal cord to brain interaction, motor neuron, effector (action)
- C.
Stimulus, sensory neuron, inter-neuron relay, motor neuron, effector (action)
- D.
Action, brain to spinal cord interaction, motor neuron, muscle movement
Correct Answer
C. Stimulus, sensory neuron, inter-neuron relay, motor neuron, effector (action)Explanation
Remember that in a reflex arc, the spinal cord acts independently of the brain in order to react more quickly, AAR the interaction between the spinal cord and the brain (which does occur) would not actually be a part of the reflex arc.Rate this question:
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- 8.
A receptor is...
- A.
A cell where sounds are converted into electrical signals
- B.
A region in a cell membrane that receives electrical impulses
- C.
A specialised structure that is sensitive to a specific external stimulus
Correct Answer
C. A specialised structure that is sensitive to a specific external stimulusExplanation
A receptor is a specialized structure that is sensitive to a specific external stimulus. This means that receptors are able to detect and respond to specific signals from the environment. Receptors can be found in various parts of the body and are responsible for converting these external stimuli into electrical signals that can be interpreted by the nervous system. By being sensitive to specific stimuli, receptors help organisms to perceive and respond to their surroundings in an appropriate manner.Rate this question:
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- 9.
What would be the second step in the reflex arc for the scenario of a bug flying into your face?
- A.
Motor neurons engage muscles and face flinches away from bug
- B.
Electrical impulse passed out of CNS and carried to the PNS through motor neurons
- C.
Sensory information carried via sensory neurons through the PNS to the CNS
- D.
Sensory information reaches the CNS inter-neuron relay
Correct Answer
D. Sensory information reaches the CNS inter-neuron relayExplanation
1. electrical impulse is carried via a sensory nerve pathway (through PNS) to the CNS, 2. where the sensory information goes through the inter-neuron relay and is converted into a motor neuron pathway, 3. impulse is now carried via a motor nerve pathway back to the PNS, and 4. the motor neurons engage muscles to flinch.Rate this question:
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- 10.
Which of the following sentences uses the word affect correctly? ...
- A.
The celiac wished that gluten had no affect on her digestive system
- B.
The celiac wished that gluten didn't affect her digestive system
Correct Answer
B. The celiac wished that gluten didn't affect her digestive systemExplanation
The correct answer is "The celiac wished that gluten didn't affect her digestive system." This sentence uses the word "affect" correctly because it is a verb that means to have an influence on something. In this sentence, the celiac is expressing a desire for gluten to have no impact on her digestive system.Rate this question:
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- 11.
**Which of the following best describes an afferent pathway?
- A.
Sensory information is passed through the afferent pathway to the control centre where it is interpreted
- B.
Nerve impulse are sent from the control centre along the afferent pathway to the muscles
Correct Answer
A. Sensory information is passed through the afferent pathway to the control centre where it is interpretedExplanation
Remember that AFFERENT is referring the pathway of SENSORY information, and sensory information is sent TO the brain.
EFFERENT pathways send information FROM the brain.Rate this question:
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