Chapter 21: Neural Control
NCERT Solutions for CBSE Class 10 Biology — 19 solved questions with detailed explanations.
Solved Questions
Q1. The gap between two neurons is called:
- Synapse
- Node of Ranvier
- Schwann cell
- Axon hillock
Difficulty: Easy · Topic: Synapse
Solution
Synapse is the junction between two neurons. Signal crosses via neurotransmitters (chemical synapse) or gap junctions (electrical).
Q2. The part of the brain responsible for balance and coordination is:
- Cerebrum
- Cerebellum
- Medulla oblongata
- Pons
Difficulty: Easy · Topic: Brain
Solution
Cerebellum controls balance, posture, and motor coordination. It is located behind the brain stem.
Q3. Parasympathetic system promotes:
- rest and digest
- exercise
- fight or flight
- stress response
Difficulty: Easy · Topic: Neural Control
Q4. Myelin sheath increases:
- number of impulses
- synapse gap
- speed of nerve impulse
- thickness of axon
Difficulty: Easy · Topic: Neural Control
Solution
speed of nerve impulse.
Q5. CNS consists of:
- peripheral nerves
- somatic nerves
- brain and spinal cord
- autonomic nervous system
Difficulty: Easy · Topic: Neural Control
Solution
brain and spinal cord.
Q6. PNS consists of:
- brain only
- autonomic only
- cranial and spinal nerves
- spinal cord only
Difficulty: Easy · Topic: Neural Control
Solution
cranial and spinal nerves.
Q7. Myelinated neurons transmit:
- no signal
- at same speed
- slower
- faster than unmyelinated
Difficulty: Easy · Topic: Neural Control
Solution
faster than unmyelinated.
Q8. Saltatory conduction occurs in:
- myelinated neurons (jumping between nodes)
- all neurons
- unmyelinated
- no neurons
Difficulty: Easy · Topic: Neural Control
Solution
myelinated neurons (jumping between nodes).
Q9. Neurotransmitter at neuromuscular junction is:
- GABA
- dopamine
- serotonin
- acetylcholine
Difficulty: Easy · Topic: Neural Control
Q10. Corpus callosum connects:
- cerebrum and cerebellum
- brain and spinal cord
- two eyes
- left and right cerebral hemispheres
Difficulty: Easy · Topic: Neural Control
Solution
left and right cerebral hemispheres.
Q11. Hypothalamus controls:
- voluntary movement
- body temperature, hunger, thirst, emotions
- hearing
- vision
Difficulty: Easy · Topic: Neural Control
Solution
body temperature, hunger, thirst, emotions.
Q12. Limbic system is associated with:
- emotions and memory
- vision
- hearing
- motor control
Difficulty: Easy · Topic: Neural Control
Solution
emotions and memory.
Q13. EEG records:
- nerve activity
- heart activity
- muscle activity
- electrical activity of brain
Difficulty: Easy · Topic: Neural Control
Solution
electrical activity of brain.
Q14. Retina contains:
- rods (dim light) and cones (color vision)
- only cones
- neither
- only rods
Difficulty: Easy · Topic: Neural Control
Solution
rods (dim light) and cones (color vision).
Q15. The largest part of the brain is:
- cerebellum
- medulla
- cerebrum
- pons
Difficulty: Easy-Medium · Topic: Neural Control
Q16. Reflex arc involves:
- only muscles
- only brain
- receptor-sensory neuron-CNS-motor neuron-effector
- only spinal cord
Difficulty: Easy-Medium · Topic: Neural Control
Solution
receptor-sensory neuron-CNS-motor neuron-effector.
Q17. Sympathetic nervous system prepares body for:
- fight or flight
- rest and digest
- meditation
- sleep
Difficulty: Easy-Medium · Topic: Neural Control
Q18. Resting membrane potential of neuron is approximately:
Difficulty: Easy-Medium · Topic: Neural Control
Q19. During action potential, Na+ ions:
- leave the cell
- are pumped out
- don't move
- rush into the cell
Difficulty: Easy-Medium · Topic: Neural Control
Solution
rush into the cell.
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