Chart 2- Effect of Shmulus Vollage on Skeletal Muscle Contraction Voltage Active Force (g) Voltage Active Force (g) 5.0 02 5.5 1.0 65 1.5 TO 20 7.5 25 8.0 30 8.6 45 Activity Questicns 1. For a muscie like the one in this lab. explain the efect of inoreasing stmulus votage 2. How is tis eflect on a muscie achieved in vivo (in the bodyi wih no electrity of course Astivity 2- The Effectet Stimukus Frequency on Skeletal Muscle Contraction Be sure o go back se sthe PhysioEx menu and choose astiviy 2 before sarding Predison Quion : As dhe asimulus fregensx increases, what will happen to he muscie force generacedwith each successive soimulus? Wi shere be a limt to this response? In Activity 3. you will be inoreasing the freguency that a certain voltage is stimulating a muscle IGEm Frequncy on Conon Simulos Frequency-unge Active force lal Voltage 86 8.5 10.0 T0.0

D Question 2 Events of the contraction cycle arrange in orderly manner 1. Cross Bridge 2. Detachment 3. ATP Hydrolysis 4. Power Stroke 1, 2, 3, 4 O 3,1,4, 2 O 2, 1, 3, 4 O 4, 3, 1, 2

Cardiomyocytes differ from skeletal muscle cells in that cardiomyocytes ______.   A "do not have actin, myosin, or Z-disk "   B do not have their actin and myosin arranged into sarcomeres and myofibrils   C cannot have action potentials at a high enough frequency for tetani to occur   D have fewer mitochondria and are more reliant on anaerobic respiration   E All of the above are true of heart muscle cells

Both Tactile Corpuscles and Lamellated Corpuscles are encapsulated and detect different amounts of pressure. Explain why the capsule surrounding these receptors is part of their modality.

5. Explain what gives muscle a striated appearance and name the myofilaments and the structures involved (Z disk, H band, I band ect.).

Smooth muscle contraction involves: OA. T-tubules OB. Sarcomeres OC. Myosin Kinase OD. All of the above O E. None of the above

A&P1 Muscle Tissue Lab Continued.... Label the images below: ARRA APAR Leese Syste Disse of heeee Which bands get smaller during a contraction? Which band stays the same during a contraction? Which filaments form the I band?. What is connected to the M line? What does Titin do? The H band? BARA

1. Describe a skeletal muscle fiber's microanatomy, including structures such as the sarcolemma, sarcoplasmic reticulum, transverse tubules, myofibrils (sarcomere structure).

For each of the following list where waste/solutes/water start and where they end up. Use the renal tubule and blood as the options for the starting and ending points Tubular reabsorption Tubular secretion Water conservation

Answer is not c