A clip from Physiology lab. We ran a current of moderate tetanizing strength through the sciatic nerve of a frogs leg.
Today's lab uses human subjects. The classic animal lab is the "frog nerve-muscle" preparation, one of the labs at University of Missouri - Columbia.
Electrodes in the gastrocnemius muscle right stimulate the muscle directly while a cuff on the sciatic nerve left stimulate the muscle via the nerve. One tendon is fixed down while the other is tethered to the force transducer.
The force transducer can be calibrated by using a weight. In another lab, smooth muscle from rabbit gut was studied.
|American Physiological Society > High School||An Orientation Exercise 1. The Language of Anatomy Exercise 2.|
A chamber, an air tube, and a transducer are used for the gut preparation. The demonstration involved manipulations like atropine to block motility. Contractions were monitored on a computer. Slide 2 See Figure and Table in your text.
Muscle Generates force and motion.
There are three types of muscle: Skeletal Muscle is striated and arranged in sarcomeres. Cardiac Muscle is striated and arranged in sarcomeres. Purkinje fibers that rapidly conduct electrical signals at the base of the heart.
Smooth Muscle is non-striated and arranged in long bundles. Also, it is normally contracted. Slide 3 See Figure Skeletal muscle can be arranged into flexors and extensors. Slide 4 See Figure a This figure shows the macro-organization of skeletal muscle. Slide 5 See Figure b This figure shows the micro-organization of the muscle fiber.
Again, myofibrils comprise the basis of each muscle fiber. Terminal cisternae are located at each end of the sarcoplasmic reticulum.
The sarcoplasmic reticulum release calcium ions, while the terminal cisternae concentrate the calcium ions. The t-tubules transverse tubules are a continuation of the fiber membrane see the holes in the sarcolemma??
Slide 6 See Figure c This figure shows the composition of a myofibril.General Physiology Lab Lab #6 Biol. L Frog Muscle Lab In this laboratory, you will investigate the physiological properties of skeletal muscle using the isolated frog gastrocnemius.
Concepts that you will explore include the single twitch, graded response and the relationship between muscle length and tension generated. LAB MUSCLE PHYSIOLOGY. The basic unit of a muscle is the muscle cell, or fiber.
Whole muscles are made up of bundles of these fibers. Where is the gastrocnemius muscle and sciatic nerve in the frog and in you? Clamp the femur of the frog to the ring stand using a femur clamp or strong metal clamp.
LAB EXERCISE 2. THE PHYSIOLOGY OF SKELETAL When an electrical stimulus is applied to a muscle directly or through the nerve supplying the in your lab report.
Lab 4 Biomechanics of Frog Skeletal Muscle I. Purpose This exercise is designed to demonstrate some mechanical and physiological properties of skeletal muscle using the gastrocnemius muscle of a frog. A02 Frog Gastrocnemius Home > Curriculum > A02 Frog Gastrocnemius This BSL PRO Lesson explains how to isolate the gastrocnemius muscle of the frog and its somatic motor nerve (the sciatic nerve) and describes the hardware and software setup necessary to record threshold voltage and contractile responses.
Gross Anatomy of Muscular System Exercise Skeletal Muscle Physiology: Frog and Human Subjects The Nervous System Exercise Human Anatomy & Physiology Laboratory Manual has provided millions of future healthcare professionals with a complete hands-on laboratory and learning experience.
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