Hormones

Hormone Classification

Steroids Lipids w/ four fused rings Cholesterol – a steroid with an alcohol Cholesterol

Cholesterol Progesterone Estrogen Testosterone

Endocrine System Pancreas

Hormone Uses Hormone Prod-uction Role Other Insulin Pancreas Decreases blood glucoes level; increases glucose and amino acid uptake and use by cells Adrenaline Adrenal Cortex (near kidneys) Responsible for the flight or fight response; goose bumps, increase heart rate, blood pressure. Affects rate of glucose release from liver Thyroxine Thyroid Gland Regulates metabolism

Hormone Uses Sex Hormone Prod-uction Role Other Androgen (testosterone) Testes Development and maintenance of male reproductive system Estrogen (estradiol) Ovaries Same as above for females Progestin (Progesterone) Prepare and maintain uterus, help developing embryo

Oral Contraceptives FSH and LH are messengers from the pituitary gland that control the female reproductive cycle. The secretion of FSH and LH can be controlled by the amount of estrogen and progesterone present Without FSH and LH, ovulation (release of egg from ovary) cannot occur. This is how oral contraceptives work – pill is mixture of estrogen and progesterone that work to prevent release of FSH and LH from pituitary gland and thereby prevent ovulation. No ovulation = no egg in uterus = no baby.