These hormones act by turning on gene and protein synthesis.

Many hormones act in a chain reaction.

This hormone acts as a natural stimulant and has an array of effects on your body that are all part of the fight-or-flight response.

Osteoblasts also manufacture hormones, such as prostaglandins, to act on the bone itself.

The brain itself is basically female until hormones act on it to make it structurally male.

Never become pregnant again because the hormones released during gestation would act like gasoline on a fire if any cancer cells remained.

The same hormones that work on the menstrual cycles act in the brain, bones and the skin, she said.

Paracrine action: the hormone acts locally by diffusing from its source to target cells in the neighborhood.

Autocrine action: the hormone acts on the same cell that produced it.

The hormone,noradrenaline, also acts as a neurotransmitter for some nerves.