compare and contrast the phases and ionic events that produce an
action potential in a contractile...
compare and contrast the phases and ionic events that produce an
action potential in a contractile cardiomyocyte from an action
potential in the specialized conduction tissue like a sino-atrial
nodal cell
Describe in detail the action potential of myocardial
contractile cells. Be sure to names the phases, include the main
types of membrane proteins involved, how they are opened, the
movements of ions, and the changes in membrane potential. Explain
how this type of action potential is different from that seen in a
skeletal muscle cell and why the difference(s) are significant.
Compare and Contrast the Neuronal Action Potential vs
Cardiac Action Potential. Focus on the steps of the both action
potentials and identify the difference(s).
What is the significance and involvement of Calcium ions in the
cardiac action potentials? Why are Calcium ions not necessary in
the neuronal action potentials, but are essential in the myocardial
AP?
Describe the net flow of ionic current during the phases of the
action potential. During what phase of the action potential does
positive feedback occur.
Compare and Contrast the Neuronal Action Potential vs Cardiac
Action Potential. Focus on the STEPS (depolorization, refractory
period repolorization, Na/K pumps, resting membrane potential,
ect...) of the both action potentials and identify the
difference(s).
What is the significance and involvement of Calcium ions in the
cardiac action potentials? Why are Calcium ions not necessary in
the neuronal action potentials, but are essential in the myocardial
AP?
3. Compare and contrast an action potential and a
local post-synaptic potential in terms of where they occur on a
neuron, the change in charge, how they propagate through a neuron.
(3)
6. What is an EPSP and IPSP? Provide a definition,
not just spelling out the acronym. (2) Provide a specific example
of how each can be generated in a neuron. (4)
8. Imagine humans have a single hypothetical neuron
that controls the decision to get out of bed....
1. Which of the following statements is false?
a. The action potential of a cardiac contractile cell has a
plateau.
b. The action potential of a cardiac contractile cell has three
phases.
c. The action potential of a cardiac contractile cell has a
gradual depolarization.
d. The action potential of a cardiac contractile cell returns to
rest.
2. The electrical axis of the heart corresponds to:
a. The conduction of the heart
b. The cardiac contractile cell action potential
c....