Neural Control and Coordination Chapter-Wise Test 18

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following structures is responsible for transmitting nerve impulses to the next neuron or effector organ?

Dendrites
Axon terminal
Cell body
Myelin sheath
2

The axon terminal releases neurotransmitters that transmit signals to the next neuron or effector organ.

Which component of the nervous system controls involuntary actions like digestion and heartbeat?

Somatic nervous system
Autonomic nervous system
Cerebellum
Spinal cord
2

The autonomic nervous system regulates involuntary functions such as digestion, respiration, and heart rate.

Which part of the neuron is responsible for transmitting impulses away from the cell body?

Dendrites
Axon
Cell body
Synaptic cleft
2

The axon carries nerve impulses away from the cell body toward the synapse or effector organ.

Which of the following describes the function of the sodium-potassium pump in neurons?

Facilitates neurotransmitter release
Maintains resting membrane potential
Speeds up impulse conduction
Generates action potential
2

The sodium-potassium pump maintains the resting membrane potential by actively transporting Na⁺ out and K⁺ into the neuron.

Which of the following neurons has a single axon and multiple dendrites?

Unipolar neuron
Bipolar neuron
Multipolar neuron
Sensory neuron
3

Multipolar neurons, which have one axon and multiple dendrites, are commonly found in the cerebral cortex.

Which neurotransmitter is primarily responsible for stimulating skeletal muscle contraction?

Dopamine
Acetylcholine
Serotonin
GABA
2

Acetylcholine is the neurotransmitter that triggers muscle contraction at the neuromuscular junction.

Which part of the brain controls voluntary movements?

Cerebellum
Cerebrum
Medulla oblongata
Pons
2

The cerebrum contains motor areas that control voluntary movements.

What is the function of the sodium-potassium pump in neurons?

Synthesis of neurotransmitters
Maintains resting membrane potential
Speeds up impulse conduction
Generates neurotransmitters
2

The sodium-potassium pump helps maintain the resting membrane potential by transporting Na⁺ out and K⁺ into the neuron.

Which type of receptor detects changes in blood pressure and is found in the walls of arteries?

Chemoreceptors
Mechanoreceptors
Baroreceptors
Thermoreceptors
3

Baroreceptors, found in the walls of arteries, detect changes in blood pressure and help regulate it.

Which part of the brain controls involuntary functions such as respiration and heart rate?

Cerebellum
Thalamus
Medulla oblongata
Pons
3

The medulla oblongata regulates involuntary functions such as breathing, heart rate, and digestion.

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