Psu Bio 161 Exam 2 Questions And
Answers With Verified Solutions Already
Passed!!!
cell body (soma) - ANSWER✔✔ contains one nucleus
dendrite - ANSWER✔✔ short extensions off the cell body, site for receiving
signals from other neurons
axon - ANSWER✔✔ extension away from the cell body, some can be
MYELINATED to improve conductivity
axon hillock - ANSWER✔✔ cone shaped region of an axon where it joins the cell
body, controls the firing of the neuron
axon terminal - ANSWER✔✔ release the neurotransmitters of the presynaptic cell
synapse - ANSWER✔✔ site of communication between neurons or between a
neuron and a target tissue
afferent (sensory) neurons - ANSWER✔✔ specialized to detect stimuli, start in
PNS (sensory receptors) and travels to the CNS, functions to deliver information
about environment or condition of the body to the CNS
interneurons - ANSWER✔✔ located in the CNS, functions to receive and integrate
information
efferent (motor) neurons - ANSWER✔✔ send signals from the CNS to
effectors/target
(muscles, organs, and glands)
how do the pathways work? - ANSWER✔✔ communicate with electrical and
chemical signals
electrical signals (action potentials)
spinal cord - ANSWER✔✔ tracts of neuronal axons (white matter) or cell bodies
(grey matter)
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