The evidence on the Oxford English Corpus shows that people often mistakenly use lay when they should be using lie : X I want to lay down, itâll be more comfortable. â I want to lie downâ¦. [infinitive of lie (1)]. X The tortoise lays on its back, its belly baking in the hot sun.
View full size image. The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things.
The endocrine system regulates the metabolism and development of most body cells and body systems through feedback mechanisms. For example, Thyrotropin-Releasing Hormone (TRH) and Thyroid Stimulating Hormone (TSH) are controlled by a number of negative feedback mechanisms.