Nervous Tissue

Processes incoming sensory information and provides stimulation for most muscle contraction

• Central nervous system

• Peripheral nervous system

• Autonomic nervous system

• Somatic nervous system

An electrical signal that propagates along the neuron's plasma membrane

• Membrane potential

• Calcium ion cascade

• Action potential

• Graded potential

Site of communication between two neurons or a neuron and an effector

• Axon terminal

• Synapse

• Presynaptic end bulb

• Dendrite

Forms and maintains the myelin sheathe of CNS neurons

• Schwann cell

• Satellite cell

• Astrocyte

• Oligodendrocyte

Composed primarily of myelinated axons

• White matter

• Grey matter

Typical value for the resting potential of a neuron membrane

• 30mV

• 0mV

• -55mV

• -70mV

A depolarizing event that doesn't meet the threshold will still fire an action potential, it just won't be as powerful

• True

• False

After depolarizing to its peak voltage, a membrane begins to repolarize. Before it can return to its resting membrane potential, it receives a massively depolarizing stimulus. Can it fire another action potential at this point?

• Yes

• No

Receives stimuli, produces generator/receptor potentials in sensory neurons, and produces EPSPs and IPSPs in motor and interneurons

• Dendrite

• Axon

• Node of Ranvier

• Soma

Depolarizing postsynaptic potential

• EPSP

• IPSP