Week 6 pt 3 - Ingestive Behavior Flashcards
Homeostasis of Cellular Fluid
Intracellular fluid = 2/3 volume
Extracellular fluid = 1/3 volume
2 types of Extracellular fluid
- Intravascular–blood plasma
- Interstitial–fluid that bathes the cells
(and a little CSF)
the ability of a surrounding solution to cause a cell to gain or lose water via osmosis
Tonicity
Satiety mechanisms
Empty stomach - triggers hunger - eating - triggers satiation (the opposite response)
2 Types of Thirst
Osmometric thirst
Volumetric Thirst
Thirst triggered by Cell Dehydration
Osmometric thirst
Thirst when intravascular (blood plasma) volume decreases aka Hypovolemia. Occurs when the blood volume drops due to a loss of extracellular fluid (the outside surrounding fluid)
Volumetric Thirst
Causes of Volumetric Thirst
Bleeding, vomiting, diarrhea
Dehydration of cells is part of body’s _________ _________ process
Natural dying
Giving IV fluid to people who are dying causes what 3 things?
- Swelling
- Edema
- Eventual respiratory distress
hormone released by the stomach when ind. are fasting or the digestive system is empty
Ghrelin
LOW Ghrelin = ↑ cortisol =
Stress and Anxiety
HIGH Ghrelin = ↓ cortisol =
Reduced Stress and Anxiety “stress eating”
Experience of hyper-phagia due to excessive levels of ghrelin and they never feel satiated/full
Prader-Willi Syndrome
Lateral hypothalamus:
When destroyed?
When activated?
Produces what?
- Stop eating and drinking when destroyed
- Overeating when activated
- Produces Orexin - motivation to eat
