The heart muscle cells contract simultaneously because of their proximity. This is due to the fact that the cells are all connected by gap junctions,...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough...
So, how do muscles contract? The functional units of muscle fibers are calledsarcomeres. When viewed under the microscope skeletal muscle has a striped pattern. This is because of the molecular structure of the sarcomere. Muscles are made of thousands of sarcomeres stacked on top of each other...
Filament Interaction and Muscle Contraction Process The steps in muscle contraction are explained through thesliding filament model. Myosin heads attach to actin filaments' myosin-binding sites, causing them to slide. The myosin head goes through aconformational change, or change in protein shape, and...
When a nerve cell needs to send a message to another nerve cell (for example, to cause a muscle to contract), it sends the message with the acetylcholine. Without cholinesterase to clear the acetylcholine, muscles start to contract uncontrollably -- this eventually causes death by suffocation ...
themselves towards each other .this produces a contraction ,which is how muscles move .the muscle cells are arranged in fibres that run along the length of the muscle .the protein fibres in the cells contract when they are stimulated by a nerve impulse ,which passes over the surface of the...
limb to control a prosthetic limb, (left side of figure below) an ex- ample being the Hero Arm from Open Bionics.52 Patients with limb paralysis due to nervous system damage can use muscle sti- mulation, where signals are transmitted from the brain via a neu- ral implant or a headband....
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When the muscle relaxes, the cell returns to its natural shape of a relatively small blob. This blob is much harder to see than the wide disc of the constricted cell. By constricting all the chromatophores with a certain pigment and relaxing all the ones with other pigments, the animal can...
When oxygen is scarce, the body is forced to work harder to ensure that the brain and muscles receive enough of this essential nutrient. One of the most commonly observed ways the body has of compensating for a lack of oxygen is to produce more red blood cells, which are responsible for ...
and living the new pattern that we seek to put into place. Literally, as we practice new movements, internal conversations (reminding yourself of what it is you are committed to) and new emotional states, we are creating new neuronal pathways in the brain and new muscle memory in the body...