Quiz Chap 12 For Exam #4 Flashcards
The nervous system controls the activity of muscles and glands. Muscles and glands can generate changes and because of that, they are known as
effectors
Which is not a general function of the nervous system?
Transporting materials throughout the body
The portion of the nervous system that conducts action potentials from the skin, joints, skeletal muscles and special senses is the ________ division.
somatic sensory
A neuron conducting an action potential from the intestine wall to the CNS would be classified as a(n) ________ neuron.
visceral sensory
Which part of the neuron is the action potential initiated?
Axon hillock
The cytoplasm within a cell body of a neuron is known as the
perikaryon
Based on function, most of neurons are
interneurons
A mixed nerve is one that contains both
sensory and motor neurons
Electrical synapses involve coupling of neurons by
gap junctions
What is the most abundant glial cell in the CNS?
Astrocyte
The glial cell that myelinates and insulates axons within the CNS is the
oligodendrocyte
The glial cell that defends the body against pathogens is the
microglial cell
The function of myelin is to
produce faster propagation of the action potential
The type of transport protein that moves a substance down its concentration gradient is a
channel
A depolarization is when the inside of a neuron becomes ________ the resting membrane potential.
less negative than
