stimulation of a receptor initiates what event?
stimulation of a receptor initiates multiple signal pathways. Specific responses depend on the type receptor.
That receptor cell fires, sending an electrical impulse down its length. The type and strength of the stimulation will effect how frequently the transducer (a cell that changes energy from one form to another) fires. However, the strength of the impulse will always be the same for any particular cell.
The type of transducer — in the eye, skin, nose, ears and so on — will determine which other cells the impulse effects.
I hope this helps a little more. Thanks for asking.
which vein drains the brain
it depends on if you are using your cns or pns
The veins that drain the brain are called cerebral veins. There are several cerebral veins that carry deoxygenated blood away from the brain and back to the heart. The main veins responsible for draining the brain are the superior sagittal sinus, the inferior sagittal sinus, the straight sinus, and the transverse sinuses. These sinuses are located within the dura mater, which is the outermost layer of the meninges surrounding the brain.
To determine the specific vein responsible for draining the brain in a particular situation, it is important to consider whether you are referring to the central nervous system (CNS) or the peripheral nervous system (PNS). The CNS includes the brain and spinal cord, while the PNS includes the nerves that extend outside of the brain and spinal cord.
If you are referring to the CNS, the cerebral veins described above play a role in draining the brain. However, if you are referring to the PNS, the drainage of blood from peripheral nerves occurs through a different network of veins.
In conclusion, the specific vein that drains the brain depends on whether you are considering the CNS or the PNS.