Exhaust system affects fuel efficiency. If you notice you have to fill up your gas tank more often than normal, have your exhaust system checked out by a muffler repair shop. Similar to the vibrations, increased fuel use is a sign something is wrong with your car. When the exhaust leaks, your engine works harder.
Temporal summation is the linear addition of graded potentials that overlap in time; that is, a second potential arrives before the first one from that source has finished. Spatial summation occurs when there is simultaneous arrival of graded potentials originating from more than one synaptic input. Summation occurs at the trigger zone. Typically a multipolar neuron has many active synapses at a given time, with multiple potentials being produced at each.
Not to be confused with ostium secundum or foramen ovale (skull) . In the fetal heart, the foramen ovale (/fÉµËreÉªmÉ¨n oÊËvaeliË/), oÊËvÃ¦liË also Foramen, botalli ostium secundum Of born or falx, septi allows blood to enter the left atrium from the right. atriumhe foramen ovale forms in the late fourth week of gestation. Initially the atria are separated from one another by the septum primum except for a small opening in the septum, the ostium primum. As the septum primum grows, the ostium primum narrows and eventually closes.