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9 Cards in this Set

  • Front
  • Back
Cells are teh smallest units of life. Name and describe the other 3 levels of organization within the human body.
Tissue, Organ, Organ system
Outline 3 differences between passive and active transport
-passive transport is teh movement of a substance down a concentration gradient while active transport is against a concentration gradiet
-Passive transport does not provide energy from teh cell while active transport does require energy
-Passive transport may take place across a living, nonliving, or artificial membrane while active transport can only take place across a living cell membrane.
Explain 3 general characteristics of connective tissue.
-Consits predominatly of intracellular material
-Embedded in the matrix are relatively few cells, varying kinds of fibers, fluid, and perhaps other material called ground material
-The qualities of the matrix of fibers largely determine the structural characteristics of each type
Briefly describe 3 funtions of the skin.
-Sense organ for pressure, touch, temperature, and pain
-Playes a role in the immune system
-Produces vitamin D in the presence of sunlight
State 3 functions of bone
-Serves as teh supporting framework for the body
-Protects delicate structures they enclose
-Carries out blood cell formation
What factors determine the range of movement possible at a joint?
-Shapes of the articulating surfaces of the bones
-The positions of the joints ligaments
-Nearby muscles and tendons
State 3 principles of skeletal muscles
-Contract only if stimulated
-Produce monement by pulling on bones
-Almost always act in groups
Name and define the 3 structures that make up a neuron
-Soma (a.k.a cell body)- contains the nucleus and other organelles
-Axon- A long process that carries a nerve impulse away from the cell body
-Dendrites- Carry a nerve impulse to the cell body
State the general functions of the cerebellum
-coordinates and balances the actions of muscles
-makes up the largest part of the brain and has 2 hemispheres. 5 lobes make up each hemisphere.