Chapter Exam

Chapter 18: Neural Control and Coordination — Online MCQ Test

Q: What is the basic structural and functional unit of the nervous system?

Answer: A. Neuron — A neuron is the basic structural and functional unit of the nervous system. It receives and transmits nerve impulses.

Q: Which part of the neuron mainly receives signals from other neurons?

Answer: B. Dendrites — Dendrites are short, branched processes that receive impulses from other neurons or receptors.

Q: Which statement best describes a nerve impulse?

Answer: B. An electrical signal along the neuron membrane — A nerve impulse is an electrical signal that travels along the neuron membrane.

Q: If the myelin sheath is present, the nerve impulse generally travels faster because:

Answer: A. Impulse jumps from node to node — Myelinated axons conduct impulses by saltatory conduction, where impulses jump between nodes of Ranvier.

BIOLOGY · CLASS 11 FIRST PUC · Karnataka State Board

Practice Chapter 18: Neural Control and Coordination with a free chapter-wise online MCQ test for Karnataka State Board CLASS 11 FIRST PUC BIOLOGY. This chapter covers: Neuron Nervous System Brain Spinal Cord Reflex Action Synapse Central Nervous System Peripheral Nervous System Coordination. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 18: Neural Control and Coordination — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 11 FIRST PUC BIOLOGY — Chapter 18: Neural Control and Coordination, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the basic structural and functional unit of the nervous system?

A. Neuron ✓
B. Axon
C. Dendrite
D. Synapse

Answer: A. Neuron
A neuron is the basic structural and functional unit of the nervous system. It receives and transmits nerve impulses.

Which part of the neuron mainly receives signals from other neurons?

A. Axon
B. Dendrites ✓
C. Myelin sheath
D. Node of Ranvier

Answer: B. Dendrites
Dendrites are short, branched processes that receive impulses from other neurons or receptors.

Which statement best describes a nerve impulse?

A. A chemical stored in the axon terminal
B. An electrical signal along the neuron membrane ✓
C. A hormone released by the brain
D. A digestive enzyme

Answer: B. An electrical signal along the neuron membrane
A nerve impulse is an electrical signal that travels along the neuron membrane.

If the myelin sheath is present, the nerve impulse generally travels faster because:

A. Impulse jumps from node to node ✓
B. Axon becomes wider
C. Synapse disappears
D. Neuron stops functioning chemically

Answer: A. Impulse jumps from node to node
Myelinated axons conduct impulses by saltatory conduction, where impulses jump between nodes of Ranvier.

Which of the following is the correct path of a nerve impulse in a simple reflex?

A. Receptor → sensory neuron → interneuron in spinal cord → motor neuron → effector ✓
B. Effector → motor neuron → spinal cord → sensory neuron → receptor
C. Receptor → motor neuron → interneuron → sensory neuron → effector
D. Sensory neuron → receptor → spinal cord → effector → motor neuron

Answer: A. Receptor → sensory neuron → interneuron in spinal cord → motor neuron → effector
In a simple reflex, the stimulus is detected by the receptor, relayed through sensory and motor neurons, and finally acts on the effector.

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