NERVOUS TISSUE Flashcards
Fast acting control system
Nervous Tissue
Triggers muscle contractions as well as gland secretions
Nervous Tissue
Forms a communication system that allows us to respond
to our environment
Nervous Tissue
–Transmission of nerve signals (electrical impulses)
Nervous Tissue
–Senses stimuli
Nervous Tissue
Determines and directs responses
Nervous Tissue
–Enables body to function as a whole
Nervous Tissue
–Transmission of nerve signals (electrical impulses)
–Senses stimuli
– Determines and directs responses
–Enables body to function as a whole
Nervous Tissue
Most neural tissue —— is concentrated in the brain and
spinal cord, the control centers for the nervous system is how much percentage?
(98%)
2 Basic Types of Nerve Cells
Neuroglia
Neurons
(support cells)
Neuroglia
–Provide physical support for neural tissue
Neuroglia
Maintain the chemical composition of the tissue fluids
Neuroglia
–Supply nutrients to neurons
Neuroglia
Defend the tissue from infection
Neuroglia
(excitable nerve cells)
Neurons
are specialized nervous tissue for communication;
Neurons
communicate through electrical events that affect their cell membranes.
neurons
our —- and —- thought processes reflect the communication among neurons.
conscious and unconscious
typical neuron has:
cell body
dendrites
axon
containing organelles and a large
nucleus
cell body
numerous branching projections called
dendrites
one — (because axons tend to be very long and
slender, they are also called nerve fibers)
axon
is sent from the axon of the
transmitting neuron to the dendrite of the receiving neuron.
electrical impulse
3 Types of Neurons
Sensory Neurons
Interneurons
Motor Neurons
neurons
activated by sensory input via
sense organs
Sensory Neurons
neurons found in
the spinal cord and brain that
provide proper connections so that
sensory impulses can be changed
into motor impulses.
Interneurons
neurons that turn
electrical impulses into physical
movements.
Motor Neurons
a nervous tissue has 4 parts what are those?
dendrites
cell body
supporting cells
axon
