dna
The pituitary gland produces something called trophic hormones. What that means is that it makes hormones, which are chemical messengers that control other glands.
They are Oestrogen, Progesterone, LH-leutinising hormone and FSH-follicle stimulating hormone. A fifth hormone that also is important is Prolactin.
covalent bond
enzymes
What is the special chemical signal the body uses to direct some of its activities?Hormone- A chemical signal used to control body functions.there you go
"hormones"
Hormones are chemical messengers that travel throughout the body and control the functions of the body. Small amounts of hormones can trigger large responses in the body.
Hormones.
The pituitary gland produces something called trophic hormones. What that means is that it makes hormones, which are chemical messengers that control other glands.
The chemical messages are called as hormones. They are released by the ductless endocrine glands into the bloodstream.
The messages of the nervous system are relayed by nervous impulses, which are very fast and short-acting. In contrast, the messages of the endocrine system are sent via chemical messengers (hormones) distributed by the circulatory system. This distribution in your blood is much slower than the electrical impulses of the nervous system.
Biochemical Signaling. All forms of Life use these and pheromones to signal to each other - both same and different. As well, endocrine and exocrine glandular systems use them for control Signals.
They are Oestrogen, Progesterone, LH-leutinising hormone and FSH-follicle stimulating hormone. A fifth hormone that also is important is Prolactin.
In the cockpit there are levers (1 for each engine) which control the fuel flow to the engines. by adjusting these and supplying different amounts of fuel to the engines the pilot controls the amount of thrust produced and subsiquently the speed
Control with the use of chemicals
What is the chemical and nervous control of blood vessels?
In biological pest control the pests are killed with a living organism whilst in chemical cultural pest control a chemical is used.