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Science Foundations II
Cell Biology
11
Health Care
Professional
12/12/2008

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Cards

Term
How is homeostasis regulated at the cellular level?
Definition
Protein functions, conformation, and communication. Changes in Extra Cellular Fluid.
Term
What three components constitute homeostatic regulatory mechanism at the organism level?
Definition
Sensors (monitor functions), effectors (systems that act to regulate conditions), reference point (set the "norm")
Term
Positive feedback systems always have a positive influence on an organism's homeostasis, true or false.
Definition
False, the often do not maintain homeostasis.
Term
What are the four classes of tissue in humans?
Definition
Epithelial (lines, protects, absorbs, filters, and secretes) Connective tissue (support, protect, hold together and partition body parts) Muscle (movement of external & internal body parts) Nerve Tissue (neurons and Neuroglia)
Term
Cholinergic system
Definition
Responsible for learning, short-term memory, arousal, and reward
Term
Serotonin system
Definition
Responsible for increasing introversion, mood, satiety, body temperature, and sleep.
Term
Dopamine system
Definition
Responsible for motor system reward, cognition, endocrine, and nausea
Term
Noradrenaline system
Definition
Responsible for arousal and reward
Term
Organs
Definition
Group of tissues that perform a specialized function
Term
Components of a Cell
Definition
Plasma membrane, organelles-nucleus, rough and smooth ER, Golgi complex, lysosomes and peroxisomes, mitochondria, cytoskeleton
Term
Functions of the Cytoskeleton
Definition
-Maintain cell shape and structural stability
-Maintain position of organelles
-Maintain position of some membrane proteins
-Assist in cell movements
-Role in homestasis
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