What is the mechanism possible for sensing muscle damage and triggering repair? Specifically in exercise and building muscle. Write full mechanism at the cellular level.

The experiment that crossed the nerve from a muscle that had a short contraction time "a fast muscle" to a muscle with a slower contraction profile and from the slower muscle to the faster muscle demonstrated that the nerve or activity of the muscle had no effect on properties of the muscle fibers.  a.) True b.) False

Vhat are the two types of muscle movement categories? Give an example for both. Describe Swammerdam's experiment and Galvani's experiment with frog legs. What did they tell us about muscle contraction? What is the sliding-filament model for muscle contraction? Describe the role of actin and myosin of sarcomeres in the model (be specific). Describe how an action potential triggers muscle contraction. Know the specific molecules involved. . Describe the structural and functional differences between smooth, cardiac and skeletal muscles. What are the three types of skeletal muscle fibers and how do they differ in structure and function? Next « Previous MacBook Pro

Muscle Contraction In an experiment, the strength of a neural stimulus and the resulting muscle contraction are compared. A single motor neuron that synapses with one muscle fibre is observed in this experiment. One end of the muscle fibre is attached to a mass. The following data were obtained from the experiment.  Number of Trials  Strength of Stimulus (mV)  Mass Lifted by Muscle Contraction (g)  1  20  0  2  40  0  3  60  50  4  80  50  5  100  Not Tested  6  120  50 *note that the voltage applied is positive in order to raise potential from resting to threshold Identify the manipulated, responding and controlled variables in the experiment described above. Strength of Stimulus   Number of Muscle Fibre Stimulated   Mass Lifted by Muscle Contraction

In the discussion section the authors wrote “In this study, we observed that different paradigms of tES application could ameliorate motor function impairments in ICH induced by collagenase administration into the striatum of rats.”  a. Is the information in this quote about afferent of efferent?             b.By what word or words do you know that your answer to the question is correct?            c. Why did you choose this word or words as an answer to the question?

Acetylcholinesterase is an important molecule in the engine end plate to share: a) stimulates receptors in the postsynaptic membrane b) synthesizes acetylcholine from acetate and choline c) breaks down acetylcholine d) stimulates the release of Ca2 + from the sarcoplasmic reticulum

Is Aval and EcoRV beta actin?

Can you reverse muscle atrophy that is due to genetic abnormalities or chemical treatment such as after chemotherapy? What are the latest advancements in this field?

In an experiment, it was determined that the motor (effector) neuron for muscle fibre 1 had a threshold level of –5 mV. The motor (effector) neuron for muscle fibre 2 had a threshold level of –16 mV. An electrical probe was used to stimulate these two effector neurons of the muscle fibres. Which of the following rows correctly identifies the reaction of each muscle fibre based on the applied stimulus voltage? a.  Stimulus Voltage  Muscle Fibre 1  Muscle Fibre 2 –10 mV Contracted Relaxed b.  Stimulus Voltage  Muscle Fibre 1  Muscle Fibre 2 –20 mV Relaxed Contracted c.  Stimulus Voltage  Muscle Fibre 1  Muscle Fibre 2 –10 mV Relaxed Contracted d.  Stimulus Voltage  Muscle Fibre 1  Muscle Fibre 2 –20 mV Contracted Relaxed

Do not use Ai