Lesson One, Intro, Homeostatis, Functions/mechanisms Flashcards
Define “Emergent Properties”?
Emergent properties can be defined as “Properties that “”Emerge”” but can’t be predicted based on the parts”
What are the two types of physiological mapping?
Structure/Function maps
&
Process maps/ Flow Charts
What is “Negative Feedback”?
Negative feedback is the response that counteracts the stimulus, essentially shutting off a feedback loop, stabilizing the variable.
(It is also the most common feedback loop)
What is Positive feedback?
Positive feedback is when the response reinforces the stimulus, essentially repeating the cycle over and over, sending the variable farther than the set point.
(Less common than negative feedback loops)
How is physiology split? (What are the two terms)
It is split through function and mechanism.
Function —> Why?
Mechanism—> How?
What are the 4 themes of physiology?
- Function and structure are closely related
- Living organism need/use energy
- Information flow coordinates body function
- Homeostasis
Define Compartmentation
Compartmentation is the division of space into compartments. It allows cells, tissues or organs to specialize and isolate functions
What are some key points of homeostasis?
Homeostasis does not equal equilibrium.
Instead homeostasis is the “Maintenance of a relatively stable internal environment”
What are “ECF’s” and “ICF’s”
ECF’s also known as extra cellular fluid is the watery environment that surrounds cells
ICF or intracellular fluid is the fluid within cells.
How do the compositions of ICF’S and ECF’s differ?
ICF’s are mostly made of a high concentration of potassium while ECF’s are made of sodium and chloride molecules
Define the “Law of Mass Balance”
The Law of Mass balance can be defined as “if the amount of a substance in the body is to remain constant, any gain must be offset by an equal loss”.
How is homeostasis reached and what terms are correlated to reaching homeostasis?
Homeostasis is reached when the excretion of an over concentrated load is done.
(Homeostasis attempts to keep values near its set point)
This is also correlated to “Mass flow” and Clearance”
They can be defined as “The rate of transport through the body” and “The rate of which a substance disappears from the blood”
Define “regulated variables”
They are variables that are kept within a normal range by control mechanisms
How do local control and reflex control differ?
Local control is restricted to a local tissue or cell while reflex control can use long-distance signaling
