What was the main finding of the first hormonal experiment that removed gonads from roosters 

Chemicals secreted by cells in one part of the body that travel through the bloodstream and act on targets in other parts of the body

 directs hormone release from endocrine glands

pituitary hormones that affect other endocrine glands

used by the hypothalamus to control the pituitary release of tropic hormone

involved in reproductive and parenting behavior, uterine contraction

ntidiuretic hormone; increases blood pressure and inhibits urine formation

stimulates egg-containing follicles in ovaries or sperm production

Neural messages are slower, hormonal messages are rapid

Neural messages are rapid, hormonal messages are slower

neural communication is sometimes voluntary, while hormones are involuntary