Neural Control and Coordination Chapter-Wise Test 20

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about the parasympathetic nervous system is correct?

It is responsible for the "rest and digest" response.
It increases heart rate and dilates pupils.
It prepares the body for emergency situations.
It does not affect glandular secretions.
1

The parasympathetic nervous system promotes relaxation, lowers heart rate, and enhances digestion.

Which of the following statements about the sodium-potassium pump is incorrect?

It helps maintain the resting membrane potential.
It moves sodium (Na⁺) into the neuron and potassium (K⁺) out.
It requires ATP to function.
It plays a role in restoring the ionic balance after an action potential.
2

The sodium-potassium pump moves sodium (Na⁺) out of the neuron and potassium (K⁺) into the neuron.

Which type of neuron is responsible for transmitting sensory information to the CNS?

Motor neuron
Interneuron
Afferent neuron
Efferent neuron
3

Afferent neurons (sensory neurons) carry sensory impulses from receptors to the central nervous system.

Which of the following statements about the corpus callosum is incorrect?

It connects the two cerebral hemispheres.
It facilitates communication between the left and right brain.
It is part of the brainstem.
It consists of a bundle of nerve fibers.
3

The corpus callosum is not part of the brainstem; it is a structure that connects the left and right cerebral hemispheres.

Which of the following statements about the brainstem is correct?

It consists of the midbrain, pons, and medulla oblongata.
It is responsible for higher cognitive functions like reasoning.
It controls only voluntary muscle movements.
It does not regulate heart rate and respiration.
1

The brainstem consists of the midbrain, pons, and medulla oblongata, and it regulates vital functions like breathing and heart rate.

Which of the following correctly describes an electrical synapse?

Neurons communicate using chemical messengers
Neurons are directly connected by gap junctions
Impulse transmission is slower compared to chemical synapses
Neurotransmitters cross the synaptic cleft
2

At an electrical synapse, neurons are directly connected by gap junctions, allowing rapid impulse transmission.

Which of the following statements about neurotransmitters is correct?

Neurotransmitters can be either excitatory or inhibitory.
All neurotransmitters have the same effect on all neurons.
Neurotransmitters pass through the postsynaptic membrane without binding to receptors.
Neurotransmitters are not involved in synaptic transmission.
1

Neurotransmitters can be excitatory (e.g., glutamate) or inhibitory (e.g., GABA), depending on the receptor they bind to.

Which of the following statements about the sodium-potassium pump is incorrect?

It helps maintain the resting membrane potential.
It moves sodium (Na⁺) into the neuron and potassium (K⁺) out.
It requires ATP to function.
It plays a role in restoring the ionic balance after an action potential.
2

The sodium-potassium pump actively transports sodium (Na⁺) out of the neuron and potassium (K⁺) into the neuron.

Which part of the brain is responsible for the regulation of emotions such as fear and pleasure?

Cerebellum
Limbic system
Medulla oblongata
Thalamus
2

The limbic system, which includes the amygdala and hippocampus, plays a key role in regulating emotions and behavior.

Which of the following is the function of the thalamus?

Regulating heart rate
Relaying sensory signals to the cerebrum
Controlling voluntary muscle movements
Secreting hormones
2

The thalamus relays sensory signals to the cerebrum and plays a role in sensory perception.

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