Neurotransmission Process Quiz

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Which division of the nervous system carries sensory information to the CNS?

Sympathetic NS

Afferent division (correct)

Efferent division

Somatic NS

Which glial cells help in forming the blood-brain barrier?

Astrocytes (correct)

Schwann cells

Oligodendrocytes

Microglia

Which type of neuron is responsible for myelination in the peripheral nervous system?

Unipolar neuron

Bipolar neuron

Schwann cell (correct)

Pyramidal cell

Where are neurotransmitters produced in a neuron?

Cell body Signup and view all the answers

Which type of transport is responsible for moving neurotransmitters from the cell body to the nerve ending?

Anterograde transport Signup and view all the answers

Which division of the autonomic nervous system controls skeletal muscles?

Somatic NS Signup and view all the answers

What is the term for a potential that is fixed at -100 mV?

Depolarization potential Signup and view all the answers

Which type of ion channels are involved during the depolarization phase of an action potential?

Voltage-gated channels Signup and view all the answers

What happens when the transmembrane potential reaches +30 mV during an action potential?

Voltage-gated Na+ channels close Signup and view all the answers

During the repolarization phase of an action potential, which ion stops influx and which ion starts outflux?

Na+ stops influx, K+ starts outflux Signup and view all the answers

What ensures the unidirectional propagation of action potentials during the absolute refractory period?

Jumping of action potentials between nodes of Ranvier Signup and view all the answers

Which structure contains neurotransmitter in synaptic vesicles?

Axonal terminal Signup and view all the answers

What is the sequence of events when an action potential arrives at the axonal terminal?

Voltage-gated Ca2+ channels open, triggering exocytosis, neurotransmitters diffuse, bind to postsynaptic receptors, ion channels open on postsynaptic membrane Signup and view all the answers

What type of potential is generated when ion channels open on the postsynaptic membrane?

Excitatory postsynaptic potential (EPSP) – depolarization Signup and view all the answers

What kind of receptor is the ACh receptor at the neuromuscular junction?

Na+ channel Signup and view all the answers

Which ion flows when acetylcholine binds to its receptor at the motor end-plate?

Na+ Signup and view all the answers

What type of potential is generated by hyperpolarization of the postsynaptic membrane?

Inhibitory postsynaptic potential (IPSP) Signup and view all the answers

Where does the major part of synaptic transmission occur?

Primary olfactory cortex Signup and view all the answers