Neuronal communication multiple choice questions

Neuronal Communication

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To which substance is the plasma membrane of an axon least permeable?

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The medulla oblongata is a region of the brainstem. It regulates the activity of several organs within the human body.

What would result from the action of the medulla oblongata via the sympathetic nervous system?

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3 of 14

The statements below relate to the autonomic nervous system (ANS).

Which statement(s) is/are correct?

1 - the ANS is a division of the peripheral nervous system

2 - autonomic neurones between the CNS and the ganglia are myelinated

3 - sympathetic neurones use acetylcholine and noradrenaline as neurotransmitters

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4 of 14

What is the heart chamber in which electrical activity is initiated?

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The drug metoprolol prevents stimulation of postsynaptic receptors in the sympathetic nervous system.

Which of the following conditions could this drug be used to treat?

1 - muscle fatigue

2 - tachycardia

3 - high blood pressure

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6 of 14

Heart rate is affected by the sympathetic and parasympathetic nervous systems.

What is an event that stimulates the medulla oblongata via the sympathetic nervous system?

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What triggers the generation of an action potential in a neuron?

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Which factor does not affect the speed at which an action potential travels?

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What is repolarisation of a neuron's membrane primarily due to?

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What happens after the action potential reaches its peak?

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What is the role of the myelin sheath?

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Which type of neuron transmits impulses from a receptor to an intermediate or motor neuron?

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What are dendrites responsible for in a neuronal cell?

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14 of 14

What is the primary function of Schwann cells in a neuron?

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