All cells exhibit a voltage difference across the cell membrane. Nerve cells and muscle cells are excitable. Their cell membrane can produce electrochemical impulses and conduct them along the membrane. In muscle cells, this electric phenomenon is also associated with the contraction of the cell.3) the single long nerve fiber, the axon. These are described in Figure 2.1. The body of a nerve cell (see also (Schad and Ford, 1973)) is similar to that of all other cells. The cell body generally includes the nucleus, mitochondria, endoplasmic reticulum, ribosomes, and other organelles.
Knocking (also knock, detonation, spark knock, pinging or pinking) in spark-ignition internal combustion engines occurs when combustion of the air/fuel mixture in the cylinder does not start off correctly in response to ignition by the spark plug, but one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front ...
I also thought it could be related to the struts but knowing the age of the car I have a knocking noise from my drivers side front end when going over bumps. You couldn't hear it unless i got up to 50 mph or slowed down to a mere 20 mph. Knocking sound with every rotation of wheel. 100 miles ago I began getting a knocking sound from my left front wheel, or while braking, the sound feeling almost completely disappear. Lift the front wheels off the ground (and set the front end on stands), and tu.