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12 Cards in this Set

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The simplest structural units of a multicellular organism that retain all of the properties of life are ...
CELLS
steps in fertilization
ovum + sperm ->
zygote ->
(undergoes) cleavage ->
multicellular ->
differentiation
The human body is organized into several levels of complexity. Name them in order of complexity, starting with the simplest:
Cells
Tissues
Organs
Systems
Organism
An organism is ...
a complex of interrelated cells which function for survival
Name the 2 MAIN FUNCTIONS of body fluids
1. To provide TRANSPORTATION of nutrients to the cells and carry waste products from the cells.
2. To provide a MEDIUM in which chemical reactions can occur.
Body fluids are contained in ...
3 COMPARTMENTS:
1. Intracellular fluid (28L)
2. Interstitial fluid (11L)
3. Plasma (3L)
Interstitial fluid and Plasma combined are ...
Extracellular fluid (14L)
Describe FLUIDS in relation to an AMOEBA
water is environment surrounding whole animal
Describe FLUIDS in relation to a Human
extracellular fluid is environment surrounding body cells
* also called intercellular fluid or interstitial fluid
internal environment of body
Total activities of every cell:
1. All BASIC fundamental cellular processes (membrane transport, protein synthesis, etc.)
2. One or more SPECIALIZED activities which contribute to the survival of the whole organism by helping maintain homeostasis.
What is the single most important, unifying idea to understand body function and interrelationships?
Homeostasis
Homeostasis
(points of interest)
* relatively constant internal environment
* changes within narrow limits
* all vital mechanisms in the body involved in preserving a relatively constant, minimally changing, internal environment.