Neural Control and Coordination Chapter-Wise Test 21

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What is the function of the medulla oblongata?

Controls voluntary muscle movements
Regulates heart rate and respiration
Processes visual information
Synthesizes neurotransmitters
2

The medulla oblongata controls involuntary functions such as heart rate, respiration, and digestion.

Which part of the neuron receives signals from other neurons?

Axon
Dendrites
Cell body
Myelin sheath
2

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

Which ion is responsible for initiating neurotransmitter release at a synapse?

Sodium (Na⁺)
Potassium (K⁺)
Calcium (Ca²⁺)
Chloride (Cl⁻)
3

Calcium ions (Ca²⁺) enter the synaptic knob and trigger the release of neurotransmitters into the synaptic cleft.

Which neurotransmitter is mainly involved in muscle contraction?

Dopamine
Serotonin
Acetylcholine
GABA
3

Acetylcholine is the primary neurotransmitter that facilitates communication at neuromuscular junctions, triggering muscle contraction.

Which neurotransmitter is involved in mood regulation and is often linked to depression?

Dopamine
Acetylcholine
Serotonin
GABA
3

Serotonin is involved in mood regulation, and its deficiency is often linked to depression.

What is the primary function of the brainstem?

Processing sensory input
Controlling involuntary actions
Regulating emotions
Generating conscious thought
2

The brainstem (medulla, pons, and midbrain) controls vital involuntary functions like breathing, heart rate, and digestion.

Which of the following structures is responsible for maintaining posture and equilibrium?

Medulla oblongata
Hypothalamus
Cerebellum
Thalamus
3

The cerebellum is responsible for coordinating voluntary movements, maintaining posture, and ensuring balance.

Which of the following statements about neurons is correct?

Neurons are the structural and functional units of the nervous system.
Neurons can divide and regenerate like normal body cells.
Neurons do not require energy to transmit impulses.
Neurons lack a cell membrane.
1

Neurons are the structural and functional units of the nervous system responsible for transmitting electrical signals.

Which structure regulates the body's temperature, hunger, and thirst?

Thalamus
Cerebrum
Hypothalamus
Medulla oblongata
3

The hypothalamus regulates body temperature, hunger, and thirst.

Which of the following is the structural and functional unit of the neural system?

Neuron
Axon
Synapse
Ganglion
1

The neuron is the structural and functional unit of the neural system, responsible for transmitting nerve impulses.

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