Quiz 8 guide + Action potentials in nerve: lab preview + Grades

Quiz 8 guide
By far most predictable questions you can have from what we have done in lab.
Go over entire theory of
- How food is really digested
- Role of muscles in digestions (those wave like movements & grinding of food). Remember these muscles and their actions. Pretty much entire first page in your lab manual.
- Three different neurotransmitters and their mode of action. The flowchart that I drew should be enough.
- What things will they effect i.e. frequency, amplitude, muscle tone, velocity and how will they effect i.e. increase or decrease and under what conditions i.e. if you add different neurotransmitters singly or in combination or when you stretch and under effect of anoxia.
- Also should be known is the fact that the stretching exercise was done to resemble an action of muscle when you gobble food.
- Most interesting of all know your calculations and what was the solution that you used to keep your intestine into and why did you use it. (These are kind of more applied questions related to your lab).


Action potentials in nerve: lab preview
- How do nerves carry our signaling and at what rates? This is what we want to learn from this lab.
- Upon stimulation nerves generate action potential. Each nerve is composed to many axons. In the first part of the experiment we will try to generate Single Action Potential (SAP) using the simulator program APSIM
- In second part we will give you frogs sciatic nerve that is a bundle of three axons (alpha, beta and gamma). This will generate Compound Action Potential (CAP) upon stimulation i.e. you anticipate to record the responses from all three axons. However the response from the gamma subunit is weak that we cannot visualize. But we will get responses from alpha and beta subunits.
- Third thing will be study of refractory period
I will leave first part on you to finish. Probably neither Faeez or I will be there to help you because taking out sciatic nerve is one great Halloween treat for TA’s.

Grades
Quiz 6: Isometric contraction
Class average: 81
Highest: 100
Lowest: 72.5

Worksheet 7: Isotonic contraction
Class average: 98.82
Highest: 100
Lowest: 90