Rem-on neurons are located within the whereas rem-off neurons are located within the

REM sleep (Rapid eye movement sleep) refers to a specific phase of sleep in birds and mammalsm differentiated by brisk movement of the eyes, followed with slow muscle tone all through the body.

The control over REM sleep includes pathways of REM-on and REM-off neurons in the brain. The REM-on neurons are mainly cholinergic, that is, involve acetylcholine. The REM-off neurons stimulate noradrenaline and serotonin that among other activities suppress the REM-on neurons.

It has been suggested that the REM-on neurons basically activate REM-off neurons, thus, functioning as the mechanism for the cycling between non-REM and REM sleep.

The REM-on neurons are located inside the sublateral dorsal nucleus, while the REM-off neurons are located inside the ventrolateral periaquaductal grey.

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !

answer: i don't know

explanation:

you need to provide a picture, otherwise i can't tell you.

if you can provide one, i'd be more than happy to you with this!