BIOM 3200 Study Guide - Midterm Guide: Hair Loss, Ataxia, Endorphins

• School: University of Guelph
• Department: Biomedical Sciences
• Course: BIOM 3200
• Professor: Alastair Summerlee

Document Summary

Homeostasis sensor --> integrator (brain) --> action (response) Process dependent on time regulates water, electrolytes, ph, oxygen/carbon dioxide, temperature. Hormone: chemical released from cell endocrine gland: tissue which releases hormones without a duct (directly into blood) Paracrine: acts on adjacent cell endocrine: goes into blood stream and acts on far away cell. Steroid advance secretory vesicles exocytosis dissolved in plasma short insulin on demand diffusion bound to carrier proteins long estrogen. Amine 1 (catechol. ) advance secretory vesicles exocytosis dissolved in plasma short epinephrine. Amine 2 (thyroid) advance secretory vesicles diffusion bound to carrier proteins long thyroxine. Adrenocortical axis stress --> hypothalamus --> crh (corticotropin releasing hormone) --> anterior pituitary --> acth (adrenocortropic hormone) adrenal glands= just above kidney actions: steroids (cortex), catecholamines (medulla) Rodents: corticosterone-pregnenolone pathway roles of cortisol: memory, mood, learning, glucose metabolism, immune system, muscle catabolism, hypertension, stress cortisol levels highest in the morning.