Chapter 16 Endocrine System
Last Modified: 2011-07-06
- Uses HORMONES to control metabolism
- Tissue/organ RESPONSES from Seconds to days.
- Effect is more prolonged than the nervous system
- Uses ELECTROCHEMICAL impulses to muscles and glands instead of using hormones.
- Response in MILLISECONDS
- Humoral stimuli (in fluids) → hormone
- Medulla (nervous system) → hormone
- Hypo → pituitary → other glands → hormone (tropic system)
Function: control body activities and maintain homeostasis (w/ negative feedback by use of hormones)
- Change in plasma membrane permeability or potential
- Synthesize proteins in the cell
- Enzyme activation or deactivation
- Stimulate mitosis
Has specific target cell
Amino acid or steroid
Diffuses into TARGET cell and combines with nuclear receptors to turn on a gene
RESPONSE is PROPORTIONAL to how many hormone-receptor complexes are formed
Travels to target of hormone receptor on cell membrane; does not enter cell
G-protein acts as signal transducer to next molecule, an effector enzyme called adenylate cyclase.
Words From Our Students
"StudyBlue is great for studying. I love the study guides, flashcards, and quizzes. So extremely helpful for all of my classes!"
Alice, Arizona State University
"I'm a student using StudyBlue, and I can 100% say that it helps me so much. Study materials for almost every subject in school are available in StudyBlue. It is so helpful for my education!"
Tim, University of Florida
"StudyBlue provides way more features than other studying apps, and thus allows me to learn very quickly! I actually feel much more comfortable taking my exams after I study with this app. It's amazing!"
Jennifer, Rutgers University
"I love flashcards but carrying around physical flashcards is cumbersome and simply outdated. StudyBlue is exactly what I was looking for!"