HSCI 100 Lecture Notes - Lecture 14: Anterior Pituitary, Posterior Pituitary, Thyroid

• School: Simon Fraser University
• Department: Health Sciences
• Course: HSCI 100
• Professor: Mark Lechner

Document Summary

Overall control of homeostasis: the nervous and endocrine systems are important in maintaining homeostasis:! The hypothalamus bridges regulatory functions of both systems! The input information may result in very rapid responses (nervous system) or more prolonged and stable responses (endocrine system)! What are hormones: hormones are chemical signals that promote communication between cells, body parts, and even individuals, hormones:! Prostaglandins: local hormones affect neighboring cells and thus are not carried in the bloodstream (paracrine)! Pheromones: volatile chemical signals that move between people and in uence the behavior of other individuals! Peptide hormones: bind to a receptor in the plasma membrane and generate signal transduction response (e. g. insulin)! Steroid hormones: lipids that enter a cell and affect gene expression patterns and levels (e. g. estrogen)! Tyrosine based hormones: derived from amino acid tyrosine and bind to plasma membrane receptors (e. g. epinephrine) 6!