Neural Control and Coordination Chapter-Wise Test 12

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which part of the nervous system controls voluntary movements?

Autonomic nervous system
Somatic nervous system
Sympathetic nervous system
Parasympathetic nervous system
2

The somatic nervous system controls voluntary muscle movements.

Which structure of the neuron is responsible for receiving and transmitting signals to the cell body?

Axon
Dendrites
Myelin sheath
Schwann cells
2

Dendrites receive signals from other neurons and transmit them to the cell body for processing.

What is the primary function of the cerebrum in the human brain?

Maintaining balance and coordination
Processing sensory information and higher cognitive functions
Controlling involuntary actions
Relaying impulses to the spinal cord
2

The cerebrum is responsible for sensory processing, voluntary movements, and higher cognitive functions.

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

Generates action potentials
Maintains resting membrane potential
Facilitates neurotransmitter release
Conducts nerve impulses along the axon
2

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

Which of the following is a characteristic of myelinated nerve fibers?

They have slower impulse conduction
They are covered by Schwann cells
They lack nodes of Ranvier
They are only found in the spinal cord
2

Myelinated nerve fibers are covered by Schwann cells, which form the insulating myelin sheath.

Which of the following statements about the hypothalamus is correct?

It regulates body temperature and hunger.
It processes visual information.
It generates action potentials.
It produces cerebrospinal fluid.
1

The hypothalamus plays a key role in regulating body temperature, hunger, thirst, and homeostasis.

Which part of the brain is responsible for regulating body temperature?

Thalamus
Cerebellum
Hypothalamus
Medulla oblongata
3

The hypothalamus regulates body temperature, hunger, thirst, and various homeostatic processes.

Which of the following statements about the sympathetic nervous system is incorrect?

It is part of the autonomic nervous system.
It is activated during stressful situations.
It decreases heart rate and promotes digestion.
It causes pupil dilation.
3

The sympathetic nervous system increases heart rate and inhibits digestion as part of the "fight-or-flight" response.

What is the function of the myelin sheath in neurons?

To generate action potentials
To insulate the axon and increase conduction speed
To store neurotransmitters
To synthesize proteins
2

The myelin sheath insulates the axon and speeds up nerve impulse conduction through saltatory conduction.

What is the function of the midbrain in the central nervous system?

Regulates emotions and motivation
Processes and integrates visual, auditory, and motor information
Controls involuntary actions such as heartbeat
Synthesizes neurotransmitters for the entire brain
2

The midbrain integrates and processes sensory inputs related to vision, hearing, and motor control.

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