Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Do you really want to delete this prezi?
Neither you, nor the coeditors you shared it with will be able to recover it again.
Make your likes visible on Facebook?
You can change this under Settings & Account at any time.
Transcript of Physio
-it acted on the respiratory and cardiovascular systems. Group 2 EXPERIMENT III
INDEPENDENT IRRITABILITY OF MUSCLE Candelario, Jorgina
Lopez, Andrea Joyce
Manalo, Frances Anne
Sicat, Camille Use a whole frog for this experiment Do not pith nor cut off the head of the frog. Connect in a series of fry cell, simple key and inductorium for single make and break shocks. Connect a hand electrode to the inductorium.
Kymograph record not needed. Surgical Procedures: Incision
Isolate sciatic nerves w/o injuring accompanying blood vessels.
Place a tight ligature around the left thigh.
Exclude the nerve from the ligature.
Expose the gastrocnemius muscle. Experimental Procedures: Stimulate each nerve and gastrocnemius w/ threshold stimulus. Note the response.
Inject 0.3 cc lidocaine into ventral lymph sac.
Wait for 5 minutes.
Stimulate both nerves and muscles using the same threshold as before. Results: Before Injection After Injection left nerve
right muscle - - + + - - - - 1. Lidocaine
-is a common local anesthetics amd anti arythmic drug.
-works by stoping nerves from sending pain signals. 2. How will injuring the accompanying blood vessels affect the results of your experiment?
-it will cause hemorrhage
-interruption of blood flow
-increase tendency w/in blood to form clots
-blood vessel injury 3. Explain your results. Draw conclusions. 5. Independent irritability of muscle. 6. Mechanism of conduction of impulse at the neuromuscular junction.
-AP travels down the motorneuron to the presynaptic terminal.
-Depolarization of the presynaptic terminal opens Ca2+ channels, and Ca2+ flows into the terminal
-ACh is extruded into the synapse by exocytosis.
-ACh binds to its receptor on the motor end plate.
-Channels for Na+ and K+ are opened in the motor end plate.
-Depolarization of the motor end plate causes AP to be generated in the adjacent muscle tissue.
-ACh is degrade to choline and acetate by AChE, choline is taken back into the presynaptic terminal on Na+ choline co transporter. This means that muscles are independent from reacting to the stimulus. They are independent from nerve.