Answer:
Insulin catalyzes the anabolic reaction.
Explanation:
Insulin and glucagon, while both are produced in the pancreas and regulate glucose concentration in blood, have opposite effects.
<u>An anabolic reaction consists of uniting smaller molecules in order to form bigger ones</u>. Insulin, in this case, sends a signal to stimulate the processes of glycogenesis and lipogenesis (both using glucose as a substrate to make bigger molecules).
Glucagon, on the contrary, catalyzes catabolic reactions: breaking glycogen molecules to obtain glucose (this process is called glycogenolysis).
Evolution: Organisms that change throughout time
Natural Selection: Describes how and why the change occurs
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.
The primary functions of the stem are to support the leaves; to conduct water and minerals to the leaves, where they can be converted into usable products by photosynthesis; and to transport these products from the leaves to other parts of the plant, including the roots.