Neural Control and Coordination is a Class 11 Biology chapter that carries about 1.0% of the Biology questions in NEET. Practise it with 45 questions covering 3 topics, each with an explanation.
Sample questions on Neural Control and Coordination with answers
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
Question 1: Central Nervous System and Reflex Action
The reflex arc, the neural pathway of a reflex action, typically involves impulses travelling through the receptor, afferent neuron, spinal cord, efferent neuron, and finally the:
- A brain
- B effector (muscle or gland)
- C sensory organ again
- D blood vessels only
Answer: B. effector (muscle or gland)
Why: A complete reflex arc pathway is: receptor → afferent (sensory) neuron → spinal cord (integration) → efferent (motor) neuron → effector (muscle or gland), which carries out the response.
Question 2: Neuron Structure and Nerve Impulse
The resting potential across the membrane of a neuron is about:
- A 0 mV
- B −70 mV, the inside being negative
- C −7 mV
- D +70 mV
Answer: B. −70 mV, the inside being negative
Why: The axoplasm has a high concentration of K⁺.
Question 3: Synaptic Transmission
Rods in the human retina are responsible for:
- A vision in bright light
- B focusing
- C vision in dim light
- D colour vision
Answer: C. vision in dim light
Why: Rods contain rhodopsin, which is made from opsin and a derivative of vitamin A; cones give colour vision in bright light.
Question 4: Central Nervous System and Reflex Action
The reflex action is a:
- A involuntary and quick response to a stimulus, mediated by the spinal cord (or the brain)
- B voluntary action
- C a learned action only
- D slow action
Answer: A. involuntary and quick response to a stimulus, mediated by the spinal cord (or the brain)
Why: The brain is not necessarily involved.
Question 5: Neuron Structure and Nerve Impulse
The functional unit of the nervous system is the:
- A neuron
- B nephron
- C sarcomere
- D axon terminal alone
Answer: A. neuron
Why: The neuron (nerve cell) is the basic structural and functional unit of the nervous system, specialized to transmit nerve impulses.
Question 6: Synaptic Transmission
At the electrical synapses, the current can flow directly from one neuron into the other. The transmission here is:
- A the same
- B slower
- C faster than the chemical synapses
- D absent
Answer: C. faster than the chemical synapses
Why: The electrical synapses are rare in our system.
Question 7: Central Nervous System and Reflex Action
The reflex arc consists of:
- A the receptor, the sensory neuron, the interneuron in the CNS, the motor neuron and the effector
- B the receptor and the effector only
- C the muscle only
- D the brain only
Answer: A. the receptor, the sensory neuron, the interneuron in the CNS, the motor neuron and the effector
Why: The knee-jerk is an example.
Question 8: Neuron Structure and Nerve Impulse
The bipolar neurons are found in the:
- A the spinal cord
- B the cerebral cortex
- C retina of the eye
- D the brain stem
Answer: C. retina of the eye
Why: They have the two processes.
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