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9 Cards in this Set

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Cells are the smallest units of life. Name and describe the other 3 levels.
1.tissue-group of cells specialized to perform a certain function.
2.organs-group of tissues specialized to perform a certain function.
3.system-group of organs specialized to perform a certain function.
outline 3 differences between active and passive transport.
1.passive moves substances down concentration gradient-active against
2.passive doesn't need energy from cell-active does
3.passive takes place against living, nonliving, or artificial membrane-active only living membrane
3 characteristics of connective tissue
1.consist predominantly of intracellular matrix
2.qualities of matrix & fibers largely determine the structural characteristic of each type
3.matrix contains 1 or more of the following kinds of fibers; collagenous (tough/strong), reticular (delicate), elastic (extensible/elastic).
3 functions of skin
1.sense organ for pressure, touch, temperature, pain
2.permits change in body contour w/o injury
3.excretes water & nitrogenous wastes.
3 functions of bone
1.serves as supporting framework for the body
2.protects the delicate structures they enclose
3.stores the minerals calcium & phosphorus among others
range of movement possible at a joint?
The types of movement possible at synovial joints depend on the shapes of the articulating surfaces of the bones & on the positions of the joints' ligaments & nearby muscles & tendons.
3 principles of skeletal muscles
1.contract only if stimulated
2.produce movement by pulling on bones
3.almost always act in groups rather than singly
name 3 structures that make up a neuron
1.cell body-also called the soma or perikaryon
2.1 axon-single process that usually extends from a tapered portion of the cell body called the axon hillock.
3.1 or more dendrites-receive stimuli & conduct electrical signals toward cell body &/or axon of neuron
state general functions of cerebellum
1.acts w/cerebral cortex to produce skilled movements by coordinating activities of groups of muscles
2.helps control posture
3.controls skeletal muscles to maintain balance