Q. What is the function of the autonomic nervous system? (2023)
A.
To control voluntary muscle movements
B.
To regulate involuntary bodily functions
C.
To process sensory information
D.
To coordinate reflex actions
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Solution
The autonomic nervous system regulates involuntary bodily functions such as heart rate and digestion.
Correct Answer:
B
— To regulate involuntary bodily functions
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Q. What is the function of the blood-brain barrier? (2022)
A.
To allow all substances to enter the brain
B.
To protect the brain from harmful substances
C.
To facilitate neurotransmitter release
D.
To enhance nerve impulse conduction
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Solution
The blood-brain barrier protects the brain from harmful substances while allowing essential nutrients to pass through.
Correct Answer:
B
— To protect the brain from harmful substances
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Q. What is the function of the synaptic cleft? (2022)
A.
To transmit electrical impulses
B.
To separate two neurons
C.
To store neurotransmitters
D.
To protect the neuron
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Solution
The synaptic cleft is the small gap between two neurons where neurotransmitters are released to facilitate communication.
Correct Answer:
B
— To separate two neurons
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Q. What is the primary function of the myelin sheath in neurons? (2021)
A.
To protect the neuron from damage
B.
To increase the speed of nerve impulse transmission
C.
To provide nutrients to the neuron
D.
To facilitate synaptic transmission
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Solution
The myelin sheath acts as an insulator and increases the speed of nerve impulse transmission through saltatory conduction.
Correct Answer:
B
— To increase the speed of nerve impulse transmission
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Q. What is the primary role of the spinal cord in the nervous system? (2022)
A.
To process sensory information
B.
To coordinate voluntary movements
C.
To transmit signals between the brain and the body
D.
To store memories
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Solution
The spinal cord transmits signals between the brain and the rest of the body, playing a crucial role in reflex actions.
Correct Answer:
C
— To transmit signals between the brain and the body
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Q. What is the resting membrane potential of a typical neuron? (2020)
A.
-70 mV
B.
-50 mV
C.
0 mV
D.
+30 mV
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Solution
The resting membrane potential of a typical neuron is approximately -70 mV.
Correct Answer:
A
— -70 mV
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Q. What is the role of neurotransmitters in neural communication? (2019)
A.
To generate action potentials
B.
To transmit signals across the synapse
C.
To maintain resting membrane potential
D.
To insulate the axon
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Solution
Neurotransmitters are chemicals that transmit signals across the synapse from one neuron to another.
Correct Answer:
B
— To transmit signals across the synapse
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Q. What is the role of neurotransmitters in the nervous system? (2019)
A.
To transmit electrical impulses along the axon
B.
To facilitate communication between neurons
C.
To protect the neuron from pathogens
D.
To store genetic information
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Solution
Neurotransmitters are chemicals that transmit signals across a synapse from one neuron to another.
Correct Answer:
B
— To facilitate communication between neurons
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Q. What is the role of the synapse in neural communication? (2022)
A.
To generate action potentials
B.
To connect two neurons
C.
To insulate the axon
D.
To store neurotransmitters
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Solution
The synapse is the junction between two neurons where neurotransmitters are released to facilitate communication.
Correct Answer:
B
— To connect two neurons
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Q. What is the role of the synaptic cleft? (2022)
A.
To connect two neurons
B.
To store neurotransmitters
C.
To facilitate the transmission of signals between neurons
D.
To protect the neuron from damage
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Solution
The synaptic cleft is the gap between two neurons that allows neurotransmitters to transmit signals.
Correct Answer:
C
— To facilitate the transmission of signals between neurons
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Q. Which ion is primarily responsible for depolarization during an action potential? (2023)
A.
Sodium (Na+)
B.
Potassium (K+)
C.
Calcium (Ca2+)
D.
Chloride (Cl-)
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Solution
Sodium ions (Na+) rush into the neuron during depolarization, causing the membrane potential to become more positive.
Correct Answer:
A
— Sodium (Na+)
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Q. Which ion is primarily responsible for the depolarization phase of an action potential? (2023)
A.
Sodium (Na+)
B.
Potassium (K+)
C.
Calcium (Ca2+)
D.
Chloride (Cl-)
Show solution
Solution
Sodium ions (Na+) rush into the neuron during depolarization, causing the membrane potential to become more positive.
Correct Answer:
A
— Sodium (Na+)
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Q. Which part of the nervous system is responsible for the 'fight or flight' response? (2023)
A.
Parasympathetic nervous system
B.
Sympathetic nervous system
C.
Central nervous system
D.
Somatic nervous system
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Solution
The sympathetic nervous system is responsible for the 'fight or flight' response, preparing the body for action.
Correct Answer:
B
— Sympathetic nervous system
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Q. Which part of the neuron is responsible for receiving signals from other neurons? (2020)
A.
Axon
B.
Dendrites
C.
Myelin sheath
D.
Synapse
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Solution
Dendrites are the extensions of a neuron that receive signals from other neurons.
Correct Answer:
B
— Dendrites
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Q. Which part of the neuron is responsible for transmitting impulses away from the cell body? (2023)
A.
Dendrites
B.
Axon
C.
Soma
D.
Synapse
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Solution
The axon is the long projection of a neuron that transmits impulses away from the cell body.
Correct Answer:
B
— Axon
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Q. Which part of the neuron is responsible for transmitting impulses to other neurons? (2023)
A.
Dendrites
B.
Cell body
C.
Axon
D.
Synapse
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Solution
The axon is responsible for transmitting impulses away from the cell body to other neurons or muscles.
Correct Answer:
C
— Axon
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Q. Which part of the neuron receives signals from other neurons? (2020)
A.
Axon
B.
Dendrites
C.
Cell body
D.
Synapse
Show solution
Solution
Dendrites are the parts of the neuron that receive signals from other neurons.
Correct Answer:
B
— Dendrites
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Q. Which part of the neuron transmits impulses away from the cell body? (2023)
A.
Dendrites
B.
Axon
C.
Synapse
D.
Nucleus
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Solution
The axon is the part of the neuron that transmits impulses away from the cell body to other neurons or muscles.
Correct Answer:
B
— Axon
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Q. Which structure in the neuron is responsible for the generation of action potentials? (2019)
A.
Dendrites
B.
Cell body
C.
Axon hillock
D.
Myelin sheath
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Solution
The axon hillock is the part of the neuron where action potentials are generated.
Correct Answer:
C
— Axon hillock
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Q. Which structure in the neuron is responsible for transmitting electrical impulses? (2019)
A.
Dendrites
B.
Cell body
C.
Axon
D.
Synapse
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Solution
The axon is the part of the neuron that transmits electrical impulses away from the cell body.
Correct Answer:
C
— Axon
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Q. Which structure in the neuron is responsible for transmitting impulses away from the cell body? (2019)
A.
Dendrite
B.
Axon
C.
Synapse
D.
Node of Ranvier
Show solution
Solution
The axon is the part of the neuron that transmits impulses away from the cell body.
Correct Answer:
B
— Axon
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Q. Which structure in the neuron is responsible for transmitting impulses to other neurons? (2019)
A.
Dendrites
B.
Cell body
C.
Axon
D.
Synapse
Show solution
Solution
The axon is responsible for transmitting impulses away from the cell body to other neurons.
Correct Answer:
C
— Axon
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Q. Which type of neuron carries signals away from the central nervous system? (2021)
A.
Sensory neurons
B.
Motor neurons
C.
Interneurons
D.
Glial cells
Show solution
Solution
Motor neurons carry signals away from the central nervous system to muscles and glands.
Correct Answer:
B
— Motor neurons
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Showing 1 to 23 of 23 (1 Pages)
Human Physiology - Neural Control MCQ & Objective Questions
Understanding "Human Physiology - Neural Control" is crucial for students aiming to excel in their exams. This topic not only forms a significant part of the syllabus but also features prominently in various competitive exams. Practicing MCQs and objective questions helps reinforce concepts, making it easier to score better in assessments. Engaging with practice questions allows students to identify important questions and enhances their exam preparation strategy.
What You Will Practise Here
Structure and function of neurons and glial cells
Mechanisms of neural transmission and synaptic communication
Reflex arcs and their significance in neural control
Central and peripheral nervous system functions
Neurotransmitters and their roles in signaling
Key diagrams illustrating neural pathways and reflex actions
Important definitions and concepts related to neural control
Exam Relevance
The topic of "Human Physiology - Neural Control" is frequently tested in CBSE, State Boards, NEET, and JEE exams. Students can expect questions that assess their understanding of neural mechanisms, reflex actions, and the role of neurotransmitters. Common question patterns include multiple-choice questions that require students to apply their knowledge to scenarios, making it essential to grasp the core concepts thoroughly.
Common Mistakes Students Make
Confusing the roles of different types of neurons (sensory, motor, interneurons).
Misunderstanding the process of synaptic transmission and the role of neurotransmitters.
Overlooking the significance of reflex arcs in the nervous system.
Failing to relate diagrams to theoretical concepts, leading to errors in interpretation.
FAQs
Question: What are the main functions of the nervous system?Answer: The nervous system controls and coordinates body activities, processes sensory information, and facilitates communication between different body parts.
Question: How do reflex actions work?Answer: Reflex actions are automatic responses to stimuli that occur via a reflex arc, involving sensory neurons, interneurons, and motor neurons.
Ready to enhance your understanding of "Human Physiology - Neural Control"? Dive into our practice MCQs and test your knowledge today! Mastering these concepts will not only boost your confidence but also prepare you for success in your exams.
