Exam 1 Flashcards
Neuroglia cells conduct impulses in the nervous system? T/F?
False
Which of the following best explains the function of microglial cells in the nervous system?
Phagocytes
What is the building block of the nervous system?
The neuron
The PNS can be subdivided into which of the following?
The Afferent and the Peripheral
Somatic Nervous system allows us to do what?
Move our skeletal muscles, move our eye muscles, move our mouth
What does the central nervous system consist of?
The brain, brain system, and spinal cord
Which of the following best describes the sympathetic nervous systems function?
It speeds up certain processes in the body
How does a neuron transmit a message?
Using an electrical gradient
What is the shape and function of an astrocyte cell?
They are mostly found in the blood-brain barrier and are star shaped
What is the purpose of Schwann cells?
They form myelin sheaths
Which of the following is the neurotransmitter that the parasympathetic division of the nervous system uses?
Acetylcholine
Oligodendroglia cells perform which of the following?
Provide protection for neurons of the CNS by producing myelin sheaths (small star shaped)
Which of the following cells produce cerebrospinal fluid?
Ependymal cells
Which of the following best defines the nodes of ranvier?
A gap in the myelin sheaths
What is the main part of the neuron, also known as the cell body?
Soma
Which part of a neuron is a neurotransmitter received?
The dendrites
What is the synapse?
The area between the axon terminal of one neuron and the dendrites of another
What is the purpose of the axon in a neuron?
To transmit an impulse
A neurotransmitter is usually negatively charged? T/F?
False
The axon of a neuron is negatively charged? T/F?
True
The parasympathetic nervous system is usually responsible for which of the following?
Speeds up digestion, urination, and defecation.
ANS stands for which of the Following?
Autonomic nervous system
The nervous system has two main categories that can be further divided? T/F?
Yes, the central nervous system & peripheral system
Somatic Nervous System
Controls voluntarily muscle movement
Autonomic nervous system
Controls movement of involuntary muscles
Dendrites
The receptive areas of a neuron
Axon
An extension of the neuron (the tail)
Axon terminal
At the end of the axon; makes contact w/ dendrites of another neuron
Myelin sheaths
Provides protection for the axon
Nodes of Ranvier
The spaces in between the myelin sheaths
Allows us to see the movement of electrical impulses
Nerve impulse
The way that the nervous system communicates
Vesicle
Transport vehicle
Nervous Tissue
A group of nerve cells that transmit a signal known as nerve impulses
Neuroglia cells
Do not conduct impulses
Meant to support or provide protection
Microglial cells
Small cells that protect the CNS
It engulfs & digests or destroys bacteria and any unwanted substances.
Performs phagocytosis
Ependymal cells
Some produce cerebrospinal fluid
Some have cilia(fine hair) that moves the spinal fluid through the CNS
