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  4. Neural Control and Coordination Chapter-Wise Test 3

Neural Control and Coordination Chapter-Wise Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about action potentials is incorrect?

Action potentials occur due to ion movement across the neuron's membrane.
Sodium (Na⁺) ions enter the neuron during depolarization.
Potassium (K⁺) ions leave the neuron during repolarization.
Action potentials can travel in both directions along an axon.
4

Action potentials travel in only one direction due to the refractory period, which prevents backflow.

Which of the following is NOT a function of cerebrospinal fluid (CSF)?

Providing mechanical protection to the brain
Transporting nutrients and waste
Generating nerve impulses
Acting as a shock absorber
3

Cerebrospinal fluid (CSF) protects the brain, transports nutrients, and acts as a shock absorber but does not generate nerve impulses.

Which type of synapse allows direct electrical communication between neurons?

Chemical synapse
Electrical synapse
Neurotransmitter synapse
Neuromuscular synapse
2

Electrical synapses allow direct ion flow between neurons through gap junctions, enabling faster communication.

Which of the following is a function of the parasympathetic nervous system?

Increases heart rate
Dilates pupils
Promotes digestion and relaxation
Stimulates the release of adrenaline
3

The parasympathetic nervous system is responsible for promoting digestion, slowing the heart rate, and relaxing the body.

What is the primary role of the pons in the brainstem?

Controls voluntary muscle movements
Relays signals between the brain and spinal cord
Processes auditory signals
Regulates body temperature
2

The pons contains fiber tracts that connect different parts of the brain and transmit signals between the brain and spinal cord.

Which neurotransmitter is released at chemical synapses to facilitate impulse transmission?

Insulin
Acetylcholine
Thyroxine
Glucagon
2

Acetylcholine is a neurotransmitter that facilitates impulse transmission at chemical synapses.

Which of the following statements about neurons is correct?

Neurons are specialized cells that transmit electrical and chemical signals.
Neurons can divide regularly like epithelial cells.
Neurons do not require oxygen for their function.
Neurons lack a nucleus and other organelles.
1

Neurons are highly specialized cells that transmit electrical and chemical signals but have a limited ability to divide.

Which of the following statements about the cerebellum is incorrect?

It helps coordinate voluntary muscle movements.
It plays a role in maintaining balance and posture.
It directly regulates digestion and metabolism.
It processes sensory input related to movement.
3

The cerebellum is involved in movement coordination and balance, but digestion and metabolism are regulated by other brain structures like the medulla oblongata and hypothalamus.

Which structure in the neuron contains synaptic vesicles filled with neurotransmitters?

Dendrites
Axon terminal
Cell body
Schwann cells
2

The axon terminal contains synaptic vesicles filled with neurotransmitters for signal transmission.

Which of the following statements about the cerebrum is correct?

It controls voluntary actions and higher cognitive functions.
It is responsible for regulating heart rate and breathing.
It is a part of the brainstem.
It does not contain any gray matter.
1

The cerebrum is responsible for voluntary actions, reasoning, learning, and memory.

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