The Nervous System assertion reason questions for Class 10 ICSE
1.) Assertion (A): Reflex arcs involve sensory neurons, interneurons, and motor neurons.
Reason (R): Reflex arcs allow for rapid, automatic responses to stimuli without involving the brain.
(a) A is True and R is False
(b) Both A and R are False
(c) Both A and R are True
(d) A is False and R is True
Answer: (c) Both A and R are True
2.) Assertion (A): The medulla oblongata controls vital functions such as breathing and heartbeat.
Reason (R): The medulla oblongata is located in the brainstem and connects the brain to the spinal cord.
(a) Both A and R are False
(b) A is True and R is False
(c) A is False and R is True
(d) Both A and R are True
Answer: (d) Both A and R are True
3.) Assertion (A): The cerebellum is responsible for coordinating voluntary muscle movements and maintaining balance.
Reason (R): The cerebellum receives input from sensory systems and integrates it to control movement.
(a) A is True and R is False
(b) Both A and R are True
(c) A is False and R is True
(d) Both A and R are False
Answer: (b) Both A and R are True
4.) Assertion (A): The hypothalamus regulates body temperature, hunger, and thirst.
Reason (R): The hypothalamus is a part of the limbic system involved in emotional responses.
(a) Both A and R are True
(b) A is True and R is False
(c) Both A and R are False
(d) A is False and R is True
Answer: (a) Both A and R are True
5.) Assertion (A): The central nervous system (CNS) consists of the brain and spinal cord.
Reason (R): The CNS is responsible for processing and integrating information.
(a) A is True and R is False
(b) Both A and R are True
(c) Both A and R are False
(d) A is False and R is True
Answer: (b) Both A and R are True
6.) Assertion (A): Dopamine is a neurotransmitter associated with reward and pleasure.
Reason (R): Imbalances in dopamine levels are linked to conditions such as Parkinson’s disease and schizophrenia.
(a) A is False and R is True
(b) Both A and R are False
(c) Both A and R are True
(d) A is True and R is False
Answer: (c) Both A and R are True
7.) Assertion (A): The meninges are protective membranes that cover the brain and spinal cord.
Reason (R): The meninges consist of the dura mater, arachnoid mater, and pia mater.
(a) A is True and R is False
(b) Both A and R are False
(c) A is False and R is True
(d) Both A and R are True
Answer: (d) Both A and R are True
8.) Assertion (A): The autonomic nervous system (ANS) controls involuntary bodily functions.
Reason (R): The ANS regulates activities such as heart rate, digestion, and respiratory rate.
(a) Both A and R are True
(b) A is False and R is True
(c) A is True and R is False
(d) Both A and R are False
Answer: (a) Both A and R are True
9.) Assertion (A): A synapse is a junction between two neurons where information is transmitted.
Reason (R): Neurotransmitters are released from the presynaptic neuron and bind to receptors on the postsynaptic neuron.
(a) Both A and R are False
(b) A is False and R is True
(c) Both A and R are True
(d) A is True and R is False
Answer: (c) Both A and R are True
10.) Assertion (A): The blood-brain barrier restricts the passage of certain substances from the bloodstream to the brain.
Reason (R): The blood-brain barrier is formed by tight junctions between endothelial cells in brain capillaries.
(a) Both A and R are False
(b) A is True and R is False
(c) Both A and R are True
(d) A is False and R is True
Answer: (a) Both A and R are False
11.) Assertion (A): The myelin sheath is a fatty covering that speeds up nerve impulse conduction.
Reason (R): Nodes of Ranvier are gaps in the myelin sheath where ion channels are concentrated.
(a) Both A and R are True
(b) A is False and R is True
(c) Both A and R are False
(d) A is True and R is False
Answer: (a) Both A and R are True
12.) Assertion (A): Acetylcholine is a neurotransmitter involved in both the central and peripheral nervous systems.
Reason (R): Acetylcholine is released at neuromuscular junctions and synapses in the CNS.
(a) A is False and R is True
(b) Both A and R are False
(c) A is True and R is False
(d) Both A and R are True
Answer: (d) Both A and R are True
13.) Assertion (A): Reflex arcs involve sensory neurons, interneurons, and motor neurons.
Reason (R): Reflex arcs allow for rapid, automatic responses to stimuli without involving the brain.
(a) A is True and R is False
(b) Both A and R are False
(c) Both A and R are True
(d) A is False and R is True
Answer: (c) Both A and R are True
14.) Assertion (A): The medulla oblongata controls vital functions such as breathing and heartbeat.
Reason (R): The medulla oblongata is located in the brainstem and connects the brain to the spinal cord.
(a) Both A and R are False
(b) A is True and R is False
(c) A is False and R is True
(d) Both A and R are True
Answer: (d) Both A and R are True
15.) Assertion (A): The cerebellum is responsible for coordinating voluntary muscle movements and maintaining balance.
Reason (R): The cerebellum receives input from sensory systems and integrates it to control movement.
(a) A is True and R is False
(b) Both A and R are True
(c) A is False and R is True
(d) Both A and R are False
Answer: (b) Both A and R are True
16.) Assertion (A): The sympathetic nervous system prepares the body for the “fight or flight” response.
Reason (R): The sympathetic nervous system increases heart rate and dilates airways.
(a) A is False and R is True
(b) Both A and R are False
(c) Both A and R are True
(d) A is True and R is False
Answer: (a) A is False and R is True
17.) Assertion (A): The hypothalamus regulates body temperature, hunger, and thirst.
Reason (R): The hypothalamus is a part of the limbic system involved in emotional responses.
(a) A is True and R is False
(b) Both A and R are True
(c) Both A and R are False
(d) A is False and R is True
Answer: (b) Both A and R are True
18.) Assertion (A): The blood-brain barrier restricts the passage of certain substances from the bloodstream to the brain.
Reason (R): The blood-brain barrier is formed by tight junctions between endothelial cells in brain capillaries.
(a) Both A and R are True
(b) A is False and R is True
(c) Both A and R are False
(d) A is True and R is False
Answer: (d) A is True and R is False
19.) Assertion (A): The myelin sheath is a fatty covering that speeds up nerve impulse conduction.
Reason (R): Nodes of Ranvier are gaps in the myelin sheath where ion channels are concentrated.
(a) A is True and R is False
(b) Both A and R are True
(c) A is False and R is True
(d) Both A and R are False
Answer: (c) A is False and R is True
20.) Assertion (A): The cerebellum is responsible for coordinating voluntary muscle movements and maintaining balance.
Reason (R): The cerebellum receives input from sensory systems and integrates it to control movement.
(a) Both A and R are False
(b) A is False and R is True
(c) A is True and R is False
(d) Both A and R are True
Answer: (a) Both A and R are False
21.) Assertion (A): The autonomic nervous system (ANS) controls involuntary bodily functions.
Reason (R): The ANS regulates activities such as heart rate, digestion, and respiratory rate.
(a) Both A and R are True
(b) A is False and R is True
(c) A is True and R is False
(d) Both A and R are False
Answer: (c) A is True and R is False
22). Assertion (A): The central nervous system (CNS) consists of the brain and spinal cord.
Reason (R): The CNS is responsible for processing and integrating information.
(a) Both A and R are True
(b) A is False and R is True
(c) Both A and R are False
(d) A is True and R is False
Answer: (d) A is True and R is False
23.) Assertion (A): Acetylcholine is a neurotransmitter involved in both the central and peripheral nervous systems.
Reason (R): Acetylcholine is released at neuromuscular junctions and synapses in the CNS.
(a) A is True and R is False
(b) Both A and R are False
(c) Both A and R are True
(d) A is False and R is True
Answer: (a) A is True and R is False
24.) Assertion (A): The meninges are protective membranes that cover the brain and spinal cord.
Reason (R): The meninges consist of the dura mater, arachnoid mater, and pia mater.
(a) Both A and R are True
(b) A is True and R is False
(c) Both A and R are False
(d) A is False and R is True
Answer: (c) Both A and R are False
25.) Assertion (A): Reflex arcs involve sensory neurons, interneurons, and motor neurons.
Reason (R): Reflex arcs allow for rapid, automatic responses to stimuli without involving the brain.
(a) Both A and R are False
(b) A is False and R is True
(c) A is True and R is False
(d) Both A and R are True
Answer: (d) Both A and R are True.
26.) Assertion (A): Reflex arcs involve sensory neurons, interneurons, and motor neurons.
Reason (R): Reflex arcs allow for rapid, automatic responses to stimuli without involving the brain.
(a) A is True and R is False
(b) Both A and R are False
(c) Both A and R are True
(d) A is False and R is True
Answer: (c) Both A and R are True
27.) Assertion (A): The medulla oblongata controls vital functions such as breathing and heartbeat.
Reason (R): The medulla oblongata is located in the brainstem and connects the brain to the spinal cord.
(a) Both A and R are False
(b) A is True and R is False
(c) A is False and R is True
(d) Both A and R are True
Answer: (d) Both A and R are True
28). Assertion (A): The cerebellum is responsible for coordinating voluntary muscle movements and maintaining balance.
Reason (R): The cerebellum receives input from sensory systems and integrates it to control movement.
(a) A is True and R is False
(b) Both A and R are True
(c) A is False and R is True
(d) Both A and R are False
Answer: (b) Both A and R are True
29.) Assertion (A): The hypothalamus regulates body temperature, hunger, and thirst.
Reason (R): The hypothalamus is a part of the limbic system involved in emotional responses.
(a) Both A and R are True
(b) A is True and R is False
(c) Both A and R are False
(d) A is False and R is True
Answer: (a) Both A and R are True
30.) Assertion (A): The central nervous system (CNS) consists of the brain and spinal cord.
Reason (R): The CNS is responsible for processing and integrating information.
(a) A is True and R is False
(b) Both A and R are True
(c) Both A and R are False
(d) A is False and R is True
Answer: (b) Both A and R are True
31.) Assertion (A): Dopamine is a neurotransmitter associated with reward and pleasure.
Reason (R): Imbalances in dopamine levels are linked to conditions such as Parkinson’s disease and schizophrenia.
(a) A is False and R is True
(b) Both A and R are False
(c) Both A and R are True
(d) A is True and R is False
Answer: (c) Both A and R are True
32.) Assertion (A): The meninges are protective membranes that cover the brain and spinal cord.
Reason (R): The meninges consist of the dura mater, arachnoid mater, and pia mater.
(a) A is True and R is False
(b) Both A and R are False
(c) A is False and R is True
(d) Both A and R are True
Answer: (d) Both A and R are True
33.) Assertion (A): The autonomic nervous system (ANS) controls involuntary bodily functions.
Reason (R): The ANS regulates activities such as heart rate, digestion, and respiratory rate.
(a) Both A and R are True
(b) A is False and R is True
(c) A is True and R is False
(d) Both A and R are False
Answer: (c) A is True and R is False
34.) Assertion (A): A synapse is a junction between two neurons where information is transmitted.
Reason (R): Neurotransmitters are released from the presynaptic neuron and bind to receptors on the postsynaptic neuron.
(a) Both A and R are False
(b) A is False and R is True
(c) Both A and R are True
(d) A is True and R is False
Answer: (c) Both A and R are True
35.) Assertion (A): The blood-brain barrier restricts the passage of certain substances from the bloodstream to the brain.
Reason (R): The blood-brain barrier is formed by tight junctions between endothelial cells in brain capillaries.
(a) Both A and R are False
(b) A is True and R is False
(c) Both A and R are True
(d) A is False and R is True
Answer: (a) Both A and R are False