Chapter 12 Test Flashcards
Regulation by the nervous system provides…
swift, but brief, responses to stimuli
In the CNS, a neuron typically receives information from other neurons at its…
dendrites
Phagocytic cells in neural tissue of the CNS are..;.
microglia
The neural cells responsible for the analysis of sensory input and coordination of motor outputs are…
interneurons
Why can’t most neurons in the CNS be replaced when they are lost to injury or disease?
Neurons lack centrioles and therefore cannot divide and replace themselves.
Identify the two anatomical divisions of the nervous system.
CNS- Central Nervous System
PNS- Peripheral Nervous System
Identify the two functional divisions of the peripheral nervous system, and cite their primary functions.
Afferent division- brings sensory information to the CNS from receptors in peripheral tissues and organs
Efferent division- carries motor commands from the CNS to muscles, glands, and adipose tissue
Identify the two components of the efferent division of the PNS.
somatic nervous system
autonomic nervous system
What would be the effect of damage to the afferent division of the PNS?
It would interfere with a person’s ability to sense stimuli.
Name the structural components of a typical neuron.
cell body, dendrites, an axon, telodendria, Nissl bodies, neurofilaments, intermediate neurotubules, neurofibrils, axoplasm, axolemma, initial segment, axon hillock, and collaterals.
Classify neurons according to their structure.
anaxonic
bipolar
unipolar
multipolar
Classify neurons according to their function.
sensory neurons, interneurons, and motor neurons.
Are unipolar neurons in a tissue more likely to function as sensory neurons or motor neurons?
sensory (most sensory neurons in the PNS are unipolar)
Identify the neuroglia of the central nervous system.
microglia, ependymal cells, astrocytes, and oligodendrocytes
Identify the neuroglia of the PNS.
satellite cells and Schwann cells
