Question

In: Anatomy and Physiology

Draw the action potential that would be occurring at the SA node in humans. Indicate which...

Draw the action potential that would be occurring at the SA node in humans. Indicate which ions are permeable, and direction of movement, during each part of action potential. Which channel is responsible for the unstable membrane potential?

Solutions

Expert Solution

There are two types of myocardium:-

1. Contractile myocardium

2. Specialized myocardium e.g. SA Node

.

.

Electrophysiology of contractile myocardium

.

.

.

Electrophysiology of SA node.


Related Solutions

Describe the sinoatrial node (SA node) membrane potential and action potential.  Describe how these would be affected...
Describe the sinoatrial node (SA node) membrane potential and action potential.  Describe how these would be affected by: 1) atropine, 2) norepinephrine, and 3) acetylcholine
In a conduction cell like an SA node action potential, what role does calcium play?
In a conduction cell like an SA node action potential, what role does calcium play?
Draw and label the action potential. Indicate steps 1-7 at each point of the Action Potential....
Draw and label the action potential. Indicate steps 1-7 at each point of the Action Potential. Then tell me what happens at each point. Tell me why it is important to know the steps of the Action Potential and how it works, and what it does in the body.
Draw and label the action potential. Indicate steps 1-7 at each point of the Action Potential....
Draw and label the action potential. Indicate steps 1-7 at each point of the Action Potential. Then tell me what happens at each point. Tell me why it is important to know the steps of the Action Potential and how it works, and what it does in the body.
describe the action potential associated with the sinoatrial node.
describe the action potential associated with the sinoatrial node.
Describe in detail the action potential of an SA nodal cell of the heart. Be sure...
Describe in detail the action potential of an SA nodal cell of the heart. 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.
What would happen to the SA node if a chemical blocker was used to reduce transport...
What would happen to the SA node if a chemical blocker was used to reduce transport of Na+ into the pacemaker cells?
Which of the amino acids neurotransmitters would be responsible for producing an action potential and which...
Which of the amino acids neurotransmitters would be responsible for producing an action potential and which would most likely be released to prevent an action potential from occurring? Can you think of a time when it might be helpful to have a neurotransmitter that, when it binds to the post-synaptic cell, it inhibits an action potential?
Agonists and Antagonists can alter neurotransmitter activity. Agonists excite and create an action potential; antagonists inhibit an action potential from occurring.
  Agonists and Antagonists can alter neurotransmitter activity. Agonists excite and create an action potential; antagonists inhibit an action potential from occurring.   Explain specifically how these molecules affect and alter or interfere with neurotransmitter activity, citing several key components in neural communication in each response.   a.  Agonists:Response: b.  Antagonists: Response:
An increase in action potential frequency of a motor neuron would result in which of the...
An increase in action potential frequency of a motor neuron would result in which of the following (select all that apply): A) Increased Ca2+ in the sarcoplasm. B) Increased influx of Ca2+ ions. C) Increased muscle fiber contraction. D) Decreased activity of AChE. E) Decreased release of ACh.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT