PNB 2274 Final Exam Review Questions and Answers 100% Solved
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Course
PNB 2274
Institution
PNB 2274
PNB 2274 Final Exam Review Questions
and Answers 100% Solved
anatomy - how does it look?
physiology - what does it do?
gross anatomy - structures you can see with the naked eye
microscopic anatomy - structures you can only see with magnification,
cells/ tissues
anatomy position - standing up...
negative feedback - ✔✔glucose levels, heart rate, etc. are examples of this
type of feedback
phospholipid bilayer - ✔✔composed of hydrophobic tails and heads; fluid
mosaic; forms the plasma membrane. Serves as a physical barrier,
gateway for exchange, communication, and attachment site
passive transport - ✔✔transport that requires no extra energy; movement
occurs randomly from areas of high concentration to low concentration
active transport - ✔✔transport that requires energy typically in the form of
ATP; molecules are moved from areas of low concentration to high
concentration, AGAINST concentration gradient
simple diffusion - ✔✔random motion of molecules in solution that results in
spread of molecules from areas of high concentration to low concentration.
Net movement until the concentrations are equal. Can occur in open
system or across partition (plasma membrane)
flux - ✔✔how much does a concentration drop over a distance; overall flow
Fick's Law - ✔✔describes the movement of molecules in 1 dimension. The
overall flow is the negative of the product of the diffusion coefficient and
concentration gradient
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