Physiology: Ion Channels and Action Potentials
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Questions and Answers

What is the term used to describe the functional connection between a neuron and a second cell?

Synapse

In the Central Nervous System (CNS), what type of cell is the second cell connected to a neuron at a synapse?

Neuron

What are the three types of synapses based on the location of connection between neurons?

Axodendritic, Axosomatic, Axoaxonic

What term describes the event involving changes in Na+ and K+ diffusion leading to changes in membrane potential, known as nerve impulse?

<p>Action potential</p> Signup and view all the answers

What is the term for the release of neurotransmitter molecules from the presynaptic axon terminals?

<p>Neurotransmitter release</p> Signup and view all the answers

What is the specific receptor protein that neurotransmitters bind to on the postsynaptic membrane?

<p>Ligand-gated receptor proteins</p> Signup and view all the answers

What is the role of astrocytes in the CNS?

<p>Formation of synapses</p> Signup and view all the answers

How are molecules within brain capillaries moved through the endothelial cells?

<p>Diffusion, active transport, endocytosis, exocytosis</p> Signup and view all the answers

What type of junctions join brain capillaries together?

<p>Tight junctions</p> Signup and view all the answers

What is the event called when there is a flow of ions resulting in changes in membrane potential?

<p>Action potential</p> Signup and view all the answers

What is the resting membrane potential (rmp) of neurons typically?

<p>-70 mV</p> Signup and view all the answers

What process is seen as a line deflecting upward from the resting membrane potential?

<p>Depolarization</p> Signup and view all the answers

What are the three main components of a neuron?

<p>Cell body, dendrites, axon</p> Signup and view all the answers

How are dendrites and axons commonly referred to?

<p>Processes or extensions</p> Signup and view all the answers

What are the three main types of neurons based on function?

<p>Sensory (afferent), Motor (efferent), Interneurons (Association)</p> Signup and view all the answers

What are the two main types of neurons based on structure of their processes?

<p>Pseudo unipolar, Bipolar neurons</p> Signup and view all the answers

What are the two main divisions of the nervous system?

<p>Central nervous system (CNS) and Peripheral nervous system (PNS)</p> Signup and view all the answers

What is the role of supporting cells in the nervous system?

<p>Supporting cells assist the functions of neurons.</p> Signup and view all the answers

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