If the action of acetylcholinesterase wereinhibited, the level of acetylcholine would increase as well as the duration of its action. The effect would cause muscle spasms.
This is because an electrical signal, or nerve impulse, is conducted byacetylcholine across the junction between the nerve and the muscle (the synapse) stimulating the muscle to move. Normally, after the appropriate response is accomplished, acetylcholinesterase is released which breaks down the acetylcholine terminating the stimulation of the muscle. The enzyme acetylcholine accomplishes this by chemically breaking the compound into other compounds and removing them from the nerve junction.
If acetylcholinesterase is unable to breakdown or remove acetylcholine, the muscle can continue to move uncontrollably.
Electrical impulses can fire away continuously unless the number of messages being sent through the synapse is limited by the action of acetylcholinesterase.
Repeated and unchecked firing of electrical signals can cause uncontrolled, rapid twitching of some muscles, paralyzed breathing, convulsions, and in extreme cases, death.
The importance is that acetylcholinerase is something called an enzyme, which digests acetycholine. Acetycholine is something called a neurotransmitter which helps motivate the contraction in the neuromuscular junction.
Ca2+
Stretching a myocardial cell allows more Ca+2 into the cell and increases the force of contraction (the longer the muscle fiber when it begins to contract, the greater the force of contraction).
A Muscle Twitch is a single contraction of skeletal muscle. The three distinct phases are latent, contraction, and relaxation. Latent Phase: Is the interval from the stimulus application until the muscle begins to contract (shorten). Note that there is no traced activity during this phase, but there are some electrical and chemical changes taking place during this phase. Contraction Phase: This phase is when the muscle fibers shorten, the tracings will show during this phase (a) peak(s). Relaxation Phase: This phase is represented by the downward curve in your tracings, this is when the muscle is going back to its original state of relaxation and the muscle will once again lengthen
The cytoskeleton helps a cell keep its shape. The internal movement of organelles, as well as cell locomotion and muscle fiber contraction couldn't take place without it. The cytoskeleton helps a cell keep its shape. The internal movement of organelles, as well as cell locomotion and muscle fiber contraction couldn't take place without it.
The sarcolemma is the cell membrane of a muscle fiber. It surrounds and protects the muscle fiber and controls the movement of substances into and out of the cell. The sarcolemma plays a crucial role in muscle contraction and the transmission of nerve impulses to the muscle fiber.
6 steps in a muscle contraction
Ca2+
Mitochondria - to produce the ATP needed for muscle contraction
The myofibril is the basic muscle cell, within which is the sarcomere, the basic unit of muscle contraction.
Contraction
The muscle cell relaxes and returns passively to its resting length
Stretching a myocardial cell allows more Ca+2 into the cell and increases the force of contraction (the longer the muscle fiber when it begins to contract, the greater the force of contraction).
It doesn't have "no effect" ... it's just too feeble to be noticed.
ATP breaks down when a muscle cell demands energy to perform its work of contraction. ATP, which is a nucleoside triphosphate, stands for adenosine triphosphate.
Tonus (relaxation), Excitation (neural stimulation, Clonus (contraction), Tetanus (prolonged contraction), return to Tonus (relaxation) Or Excitation, Excitation-Contraction Coupling, Contraction, Relaxation
A Muscle Twitch is a single contraction of skeletal muscle. The three distinct phases are latent, contraction, and relaxation. Latent Phase: Is the interval from the stimulus application until the muscle begins to contract (shorten). Note that there is no traced activity during this phase, but there are some electrical and chemical changes taking place during this phase. Contraction Phase: This phase is when the muscle fibers shorten, the tracings will show during this phase (a) peak(s). Relaxation Phase: This phase is represented by the downward curve in your tracings, this is when the muscle is going back to its original state of relaxation and the muscle will once again lengthen
Isometric,Isotonic and Twitch-these are the three characeteristics of muscle contraction.