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18 terms

Human Body Systems Test

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Enzyme
A protein that is capable of speeding up a chemical reaction.
Tissue
A group of similar cells that work together to carry out a specific function. The function of muscle tissue, for example, is to contract.
Body System
A group of organs that work together to perform a specific function. For example, the organs of the digestive system process food and prepare it for delivery to the body's cells.
Organ
A group of different tissues that work together to perform a specific function. Examples include the heart, liver, and brain.
Peristalsis
Regular muscular contractions that move food through the digestive tract.
Diffusion
The process by which molecules move from places where they are more concentrated to places where they are less concentrated. A form of passive transport.
Chemical Digestion
the digestion process in which enzymes are used to break foods into their smaller chemical buiding blocks
Mechanical Digestion
Part of digestion that uses movement and muscles to break down food
Heartburn
Occurs when stomach acids backup into the esophagus causing painful discomfort in the chest
Liver
large and complicated reddish-brown glandular organ located in the upper right portion of the abdominal cavity
Gall Bladder
organ that stores bile.
Pancreas
the organ that lies behind the stomach and that makes digestive enzymes and hormones that regulates sugar levels.
Appendix
a vestigial process that extends from the lower end of the cecum and that resembles a small pouch
Small Intestine
organ that completes the chemical digestion of food and absorbs the nutrients.
Large Intestine
the last section of the digestive system, where water is absorbed from food and the remaining material is eliminated from the body
Active Transport
transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient.
Passive Transport
the movement of substances across a cell membrane without the use of energy by the cell
Bile
a digestive juice secreted by the liver and stored in the gallbladder.

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