Neural Control and Coordination
Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following structures is NOT part of the hindbrain?

Cerebellum
Pons
Medulla oblongata
Hypothalamus
4

The hypothalamus is part of the forebrain, whereas the cerebellum, pons, and medulla oblongata are components of the hindbrain.

Which type of neuron transmits impulses from the CNS to the effector organs?

Sensory neuron
Afferent neuron
Efferent neuron
Interneuron
3

Efferent neurons transmit impulses from the CNS to effector organs such as muscles and glands.

Which part of the brain regulates circadian rhythms in humans?

Medulla oblongata
Hypothalamus
Thalamus
Pons
2

The hypothalamus regulates circadian rhythms by controlling the sleep-wake cycle.

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

It consists of the brain and spinal cord.
It controls only involuntary actions.
It does not communicate with the peripheral nervous system.
It is not protected by any membrane.
1

The central nervous system (CNS) consists of the brain and spinal cord, which control voluntary and involuntary actions.

Which of the following statements about neurotransmitter release is incorrect?

Calcium ions trigger neurotransmitter release at the synapse.
Neurotransmitters are released from synaptic vesicles.
Neurotransmitter release occurs only at chemical synapses.
Neurotransmitters are directly transmitted through electrical synapses.
4

In electrical synapses, nerve impulses are directly transmitted via gap junctions, without neurotransmitter involvement.

Which of the following statements about the peripheral nervous system (PNS) is correct?

It consists of the brain and spinal cord.
It includes cranial and spinal nerves.
It does not interact with the central nervous system.
It only controls involuntary functions.
2

The peripheral nervous system (PNS) consists of cranial and spinal nerves, which connect the CNS to the rest of the body.

Which of the following statements about the myelin sheath is correct?

It speeds up the transmission of nerve impulses.
It is produced by microglia.
It slows down nerve conduction.
It covers all neurons in the body.
1

The myelin sheath increases the speed of nerve impulse transmission by insulating the axon.

Which of the following is NOT a function of the medulla oblongata?

Regulation of respiration
Control of cardiovascular reflexes
Coordination of muscle movements
Regulation of gastric secretions
3

The medulla oblongata controls vital functions such as respiration, cardiovascular reflexes, and gastric secretions, but coordination of muscle movements is primarily handled by the cerebellum.

Which structure is involved in the transmission of impulses at a chemical synapse?

Neurotransmitters
Axon hillock
Dendrites
Nodes of Ranvier
1

Neurotransmitters are released into the synaptic cleft to facilitate impulse transmission at a chemical synapse.

Which of the following is NOT a characteristic of myelinated nerve fibers?

Presence of Schwann cells
Faster conduction of nerve impulses
Continuous conduction of impulses
Presence of nodes of Ranvier
3

In myelinated nerve fibers, impulses jump between nodes of Ranvier via saltatory conduction, making conduction faster rather than continuous.

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