1. When membrane potential changes, we use the terms
depolarization, hyperpolarization, and repolarization. Explain what
is happening to the membrane potential in relation to the
extracellular fluid during depolarization and hyperpolarization.
Explain how depolarization is possible with the movement of
positive ions. Explain how depolarization is possible with the
movement of negative ions. Explain how hyperpolarization is
possible with the movement of both positive and negative ions, like
you did for depolarization.
The ____ wave represents ventricular repolarization.
The ____ wave represents ventricular depolarization.
The ____ wave represents atrial depolarization?
A(n) _____________ ____________
______________ is a defect in the wall between the two
ventricles.
A(n) _____________ ____________
______________ is a defect in the wall between the two atria.
The _________________ _______________ return
oxygenated blood from the lungs to the heart.
The _________ ventricle pumps blood into the pulmonary
circuit.
The _________________ are the external enlarge flaps on the
outside of the atria....
What is the RMP?
Depolarization: Which gates are open and which gates are
closed?
Repolarization: Which gates close and which ones open?
How does the cell go back to RMP?
correlate the electrical (depolarization and repolarization)
with the mechanical events ( chamber systole/diastole) and valves
opening and closing) of the cardiac cylce
The membrane potential changes relative to RMP during
depolarization and hyperpolarization. How do they affect
the probability of generating nerve impulses?
QUESTION 8
In a neuron, _______________ occurs when sodium gates
open.
repolarization
resting membrane potential
hyperpolarization
depolarization
2 points
QUESTION 9
Saltatory conduction occurs from node to node.
True
False
2 points
QUESTION 10
Which of the following proteins are active during anaerobic
fermentation?
myokinase
protease
acetylcholinesterase
phosphatse
2 points
QUESTION 11
_____________ has the greatest influence on resting membrane
potential.
Sodium
Chloride
Magnesium
Potassium
2 points
QUESTION 12
Ribosomes are in the ___________________.
soma
axon...
9 -During depolarization: a- Voltage gated potassium channels
open when the membrane potential reaches threshold value b-
Potassium ions move from outside the neuron to inside the neuron c-
Sodium ions move from inside the neuron to outside the neuron d-
Potential difference reaches +30 mv e- None of the above