Muscle Physiology - Concepts Within Practice Q’s Flashcards
What is Rigor Mortis?
-persistent muscle contraction (relaxation failure)
-rigor mortis is caused by loss of all the energy compounds in the muscle that that energy is not available for relaxation
How do organophosphates function?
This pesticide damages an enzyme in the body called acetylcholinesterase, which is critical for controlling nerve signals.
What is the best description for Myasthenia Gravis?
Antibodies block, alter or destroy the receptors for acetylcholine at the neuromuscular junction, which prevents muscle contraction.
What is the importance of calcium in neurotransmission at the synaptic level?
Background: Chronic renal failure, hypocalcemia
What causes the spasms and tremors in the cat?
Termination of a typical skeletal muscle twitch can be caused by?
What is tetanus and what are the characteristics of tetanus?
Tetany refers to sustained contraction of a muscle, which is the result of a rapid succession of nerve impulses. Tetanus can be fused or infused.
What is Unfused Tetanus?
When the muscle fibers do not completely relax before the next stimulus because they are being stimulated at a fast rate; however there is a partial relaxation of the muscle fibers between the twitches?
What is Fused Tetanus?
When there is no relation of the muscle fibers between stimuli and it occurs during a high rate of stimulation.
A fused tetanic contraction is the strongest single unit twitch in contraction.
