Bio 669 Quiz 2 UPDATED ACTUAL Questions and CORRECT Answers
6 views 0 purchase
Course
BIO 669
Institution
BIO 669
Bio 669 Quiz 2 UPDATED ACTUAL
Questions and CORRECT Answers
Neuron is composed of - CORRECT ANSWER- cell body, dendrites, axon
densely packed cell bodies in the CNS are called _____ - CORRECT ANSWER- nuclei
densely packed cell bodies in the PNS are called _____ - CORRECT ANSWER- Ganglia
What ...
Bio 669 Quiz 2 UPDATED ACTUAL
Questions and CORRECT Answers
Neuron is composed of - CORRECT ANSWER✔✔- cell body, dendrites, axon
densely packed cell bodies in the CNS are called _____ - CORRECT ANSWER✔✔- nuclei
densely packed cell bodies in the PNS are called _____ - CORRECT ANSWER✔✔- Ganglia
What are dendrites? - CORRECT ANSWER✔✔- Receptive portions of the neuron; receives
information
What do axons do? - CORRECT ANSWER✔✔- Carry impulses away from the cell body
is membrane potential about the inside of the cell or the outside? - CORRECT
ANSWER✔✔- inside of the cell
what is an electrochemical gradient? - CORRECT ANSWER✔✔- describes the forces affect
on ion movement if allowed to become permeable a membrane
when does action potential start? - CORRECT ANSWER✔✔- when a membrane is
depolarized enough that it triggers voltage-gated ion channels
What is a graded potential? - CORRECT ANSWER✔✔- changes in membrane potential that
decreases over distance
what Is a refectory period? - CORRECT ANSWER✔✔- a period immediately following
stimulation that is unresponsive for some time.
Reduced sensitivity
What is myelin? - CORRECT ANSWER✔✔- A segmented layer of lipid material, acts as
insulation.
, what is myelin called in the PNS? - CORRECT ANSWER✔✔- Schwann cells
What are the nodes of Ranvier? - CORRECT ANSWER✔✔- gaps/regular interruptions in
the myelin sheath
What is saltatory conduction? - CORRECT ANSWER✔✔- The flow of ions between
segments of myelin rather than alone the entire length of the axon. Like playing leap frog.
What is divergence? - CORRECT ANSWER✔✔- ability of branching axons to influence
many neurons
What is convergence? - CORRECT ANSWER✔✔- Branches of numerous neurons
converging on one or a few neurons
Central Nervous System (CNS) is made up of - CORRECT ANSWER✔✔- brain and spinal
cord
Peripheral Nervous System (PNS) is made up of - CORRECT ANSWER✔✔- cranial nerves
and spinal nerves
efferent pathways are _____ - CORRECT ANSWER✔✔- descending
What does the somatic nervous system do? - CORRECT ANSWER✔✔- motor and sensory
pathways that regulate voluntary motor control of the skeletal muscles
What does the autonomic nervous system do? - CORRECT ANSWER✔✔- motor and
sensory pathways that regulate the bodies internal environment through involuntary control
or organ systems
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller MGRADES. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
