Wk 10- Homeostasis & Endocrine System
No description yet. This curated deck is ready for daily study.
Card preview (12)
What are the 5 five main endocrine organs? • P? Glands • T? • P? • A? Glands • Gonads
• Pituitary glands • Thyroid • Pancreas • Adrenal glands • Gonads
What is homeostasis? Keeps the body f? working in ideal e?. Ph blood 7.?5- 7.4? Body Temp 37 degrees Homeostatic regulation = adjustments to ph? systems responding to st?.
Functions, environment 7.35-7.45 Physiological ,stimuli
Homeostasis requires 3 components, what are they? • R? • C? Centre • E?
Receptor Control Effector
Homeostasis: Receptors= d? change in stimulus / e? conditions Control centre= p? in? from receptors and tissues and sends commands to e? Effectors= cell/ organ responds to commands from control centre and either en? or op? stimulus. This is either p? or n? feedback
Detect , environmental Processes information, effector Enhances , opposes Positive/ negative
Homeostasis: Negative feedback= Majority of homeostatic systems response O? original stimulus (^ body temperature detected = decrease temperature by s?) E? mechanism is turned off
Oppose, sweating Effector
Homeostasis: Positive feedback= E? original stimulus (blood c? to prevent blood loss)
Enhance , clotting
Hormones > target cells Hormones travel in the b? Bind to r? cell on the cell surface Bind to specific t? cell = specific receptors for specific hormones In turn this modifies the structure/ b? property of the target cell
Blood Receptors Target Biochemical
What are the 3 components of endocrine control? • H? • H? • N?
Hormonal Humoral Neural
Endocrine control: 1. Hormonal~ Reg? hormones are secreted by the hy? • Humoral~ P? cells monitor Ca++ (?) irons in the blood • Neural~ Signals from the n? system
Regulatory , hypothalamus Parathyroid , calcium Nervous
Hormonal: Secretion of ?H regulated by GHRH (?) from the p? Gland
Growth , growth hormone releasing hormone Pituitary
Humoral: Endocrine cells respond to the concentration of ions/ molecules in the blood. Beta islet cells from the p? respond to the increase of blood g? levels by releasing ? Alpha cells = g? Beta cells = I?
Pancreas, glucose, insulin Glucogen Insulin
Neural: Endocrine cells respond to signals from the nervous system. In danger n? from the s? nervous system cause the secretion of e? and n?e?.
Neurons, sympathetic, epinephrine , nor epinephrine