Cbns 120 Midterm 1 Updated Actual Questions And Correct Answers

CBNS 120 MIDTERM 1 UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS

Question:
1. Cajal used the [_________] stain to prove the [___________]
Doctrine.

Answer:
golgi; neuron

Question:
2. Conductance is the reciprocal of:

Answer:
resistance

Question:
3. Hyperpolarization occurs when the membrane potential
becomes more [_____________], while depolarization causes
the membrane potential to become more [_______________].

Answer:
negative; positive

Question:
4. Permeability indicates the presence of ______, while
conductance requires _______ and ______.

Answer:
open channels; ions; permeability

Question:
5. Permeability is the ability of the membrane to conduct
_________ .

Answer:
ions

Question:
6. Categories of ion channels include ________, _________, and
_________.

Answer:
stretch-activated; voltage-activated; ligand-activated

, Question:
7. Conductance can be distinguished from permeability by
the requirement for ___________.

Answer:
charge

Question:
8. The membrane potential at which the diffusional force
created by an ion gradient is equal and opposite to the
electrical force is called the [________________].

Answer:
equilibrium potential

Question:
9. The difference between the membrane potential (Vm)
and the equilibrium potential (Ex) for any given ion is
called [_____________].

Answer:
driving force

Question:
10. When current flow across the membrane in one direction
exceeds current flow in the opposite direction, it is called
___________.

Answer:
rectification

Question:
11. Ion channels flux (transfer) ions across the membrane at
rates of
a.) 10^7-10^8 ions/sec
b.) 10^3-10^5 ions/sec
c.) 10^2-10^3 ions/sec
d.) 10^9-10^10 ions/sec

Answer:
10^7-10^8 ions/sec