Chapter Exam

Chapter 6: Control and Coordination — Online MCQ Test

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

Answer: A. Neuron — A neuron is a specialised nerve cell that receives and transmits information in the nervous system.

Q: The central nervous system in humans consists of:

Answer: A. Brain and spinal cord — The central nervous system is made up of the brain and spinal cord, which process and coordinate responses.

Q: Which part of the brain is responsible for maintaining posture and balance of the body?

Answer: B. Cerebellum — The cerebellum coordinates muscular activity and helps maintain posture and balance.

Q: Endocrine glands release their secretions directly into the:

Answer: B. Blood — Endocrine glands are ductless glands that release hormones directly into the bloodstream.

Q: At a synapse, the nerve impulse is passed from one neuron to the next mainly through:

Answer: B. Chemical substances — At the synapse, chemicals are released from the end of one neuron and start an impulse in the next neuron.

Q: What is the correct direction of a nerve impulse through a neuron?

Answer: A. Dendrite → cell body → axon → axon ending — A nerve impulse is received by dendrites, passes through the cell body, travels along the axon and reaches the axon ending.

SCIENCE · CLASS 10th · Karnataka State Board

Practice Chapter 6: Control and Coordination with a free chapter-wise online MCQ test for Karnataka State Board CLASS 10th SCIENCE. This chapter covers: Nervous system Neuron Brain Spinal cord Reflex action Hormones Endocrine glands Coordination Tropic movement Stimulus Response. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 6: Control and Coordination — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 10th SCIENCE — Chapter 6: Control and Coordination, with answers and explanations. These are sample questions; the exam has its own separate question set.

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

A. Neuron ✓
B. Nephron
C. Hormone
D. Synapse

Answer: A. Neuron
A neuron is a specialised nerve cell that receives and transmits information in the nervous system.

The central nervous system in humans consists of:

A. Brain and spinal cord ✓
B. Brain and nerves
C. Spinal cord and muscles
D. Nerves and receptors

Answer: A. Brain and spinal cord
The central nervous system is made up of the brain and spinal cord, which process and coordinate responses.

Which part of the brain is responsible for maintaining posture and balance of the body?

A. Cerebrum
B. Cerebellum ✓
C. Medulla
D. Hypothalamus

Answer: B. Cerebellum
The cerebellum coordinates muscular activity and helps maintain posture and balance.

Endocrine glands release their secretions directly into the:

A. Digestive tract
B. Blood ✓
C. Nerve cells
D. Lymph nodes

Answer: B. Blood
Endocrine glands are ductless glands that release hormones directly into the bloodstream.

At a synapse, the nerve impulse is passed from one neuron to the next mainly through:

A. Blood pressure
B. Chemical substances ✓
C. Bone movement
D. Direct muscle contraction

Answer: B. Chemical substances
At the synapse, chemicals are released from the end of one neuron and start an impulse in the next neuron.

When a person accidentally touches a hot object, which pathway is most directly involved in the immediate withdrawal of the hand?

A. Receptor → sensory neuron → spinal cord → motor neuron → muscle ✓
B. Muscle → motor neuron → brain → sensory neuron → receptor
C. Receptor → motor neuron → brain → sensory neuron → muscle
D. Brain → receptor → spinal cord → muscle → sensory neuron

Answer: A. Receptor → sensory neuron → spinal cord → motor neuron → muscle
In a reflex arc, the stimulus is detected by a receptor, carried by a sensory neuron to the spinal cord, and the response is sent through a motor neuron to the muscle.

Which statement correctly compares nervous and hormonal communication?

A. Nervous messages travel through neurons, while hormones travel through blood ✓
B. Hormonal messages travel only through neurons
C. Nervous coordination uses only hormones
D. Both systems always produce equally fast responses

Answer: A. Nervous messages travel through neurons, while hormones travel through blood
Nervous coordination uses electrical impulses through neurons, while hormones are chemical messengers carried by blood.

What is the correct direction of a nerve impulse through a neuron?

A. Dendrite → cell body → axon → axon ending ✓
B. Axon ending → axon → cell body → dendrite
C. Cell body → dendrite → axon → synapse
D. Dendrite → axon ending → cell body → axon

Answer: A. Dendrite → cell body → axon → axon ending
A nerve impulse is received by dendrites, passes through the cell body, travels along the axon and reaches the axon ending.

A student says, 'All reflex actions are controlled only by the brain because the brain is the main control centre.' Which option best evaluates this statement?

A. Incorrect, because many reflex actions are coordinated by the spinal cord for a faster response ✓
B. Correct, because the spinal cord has no role in responses
C. Correct, because receptors send signals only to the cerebrum
D. Incorrect, because reflex actions are controlled by endocrine glands only

Answer: A. Incorrect, because many reflex actions are coordinated by the spinal cord for a faster response
Many reflex actions are processed through the spinal cord, allowing quick responses before conscious awareness by the brain.

A shoot is exposed to light from one side. Which sequence correctly explains its bending towards light?

A. Auxin moves to the shaded side → shaded side grows more → shoot bends towards light ✓
B. Auxin moves to the lit side → lit side grows less → shoot bends away from light
C. Auxin is destroyed everywhere → both sides stop growing → shoot bends towards light
D. Auxin moves to the root only → root pulls the shoot towards light

Answer: A. Auxin moves to the shaded side → shaded side grows more → shoot bends towards light
In shoots, auxin accumulates on the shaded side and promotes greater cell elongation there, causing the shoot to bend towards light.

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