Neural Control and Coordination
Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What is the role of the sodium-potassium pump in a neuron?

To transport neurotransmitters
To maintain the resting membrane potential
To generate action potential
To break down neurotransmitters
2

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

Which part of the nervous system controls involuntary functions such as digestion and heart rate?

Somatic nervous system
Peripheral nervous system
Autonomic nervous system
Central nervous system
3

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

Which of the following statements about synapses is correct?

Synapses only occur in the spinal cord
Synapses allow communication between neurons
Synapses store neurotransmitters permanently
Synapses are only found in the brain
2

Synapses are junctions that allow communication between neurons through neurotransmitters.

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

The central nervous system includes the brain and spinal cord.
The peripheral nervous system consists of the brain only.
Neurons cannot generate action potentials.
Myelin sheath slows down impulse conduction.
1

The central nervous system (CNS) consists of the brain and spinal cord. The peripheral nervous system includes all nerves outside the CNS.

Which of the following statements about synapses is incorrect?

Electrical synapses allow direct ion flow between neurons.
Neurotransmitters are released at chemical synapses.
All synapses in the human body are electrical synapses.
Calcium ions play a role in neurotransmitter release.
3

Both electrical and chemical synapses exist in the human body, but most synapses in humans are chemical.

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

It controls voluntary muscle movements.
It regulates involuntary functions like heart rate and digestion.
It consists only of the sympathetic nervous system.
It does not influence glandular secretion.
2

The autonomic nervous system (ANS) controls involuntary functions such as heart rate, digestion, and glandular secretions.

Which of the following statements about action potentials is incorrect?

Action potentials occur due to ion movement across the neuron's membrane.
Sodium ions (Na⁺) enter the neuron during depolarization.
Potassium ions (K⁺) 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, preventing backflow.

Which part of the human nervous system acts as the master control system?

Spinal cord
Medulla oblongata
Brain
Peripheral nerves
3

The brain is the master control system, regulating body functions, emotions, and coordination.

Which structure connects the two cerebral hemispheres?

Cerebellum
Corpus callosum
Hypothalamus
Medulla oblongata
2

The corpus callosum is a thick band of nerve fibers that connects the two hemispheres of the brain.

Which type of neuron carries impulses from sensory receptors to the central nervous system?

Motor neuron
Interneuron
Afferent neuron
Efferent neuron
3

Afferent neurons transmit sensory information from receptors to the CNS.

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