7th grade JMS Digestive system lesson 1-7 Flashcards

Large intestine
Terms Definitions
The smallest unit of an organism that can carry out the basic functions of life
A group of similar cells that work together to carry out a specific function.
A group of different tissues that work together to perform a specfic function
A number of organs and structures that work together as a whole
Body System
The tearing, grinding or mixing of food in the digestive tract
Mechanical Digestion
The breaking down of food in the digestive tract by gastric juices or enzymes
Chemical Digestion
A ring of muscle that aids in the one-way passage of food through the digestive tract.
Regular muscle contractions that move food through the digestive tract
One of the three basic food types needed to build and repair tissue in the body
One of the three basic food types. May be found in the form of starch, sugar or fiber.
A yellow-brown indicator that turns blue-black when it comes in contact with starch
Lugol solution
A chemical indicator, when added to a solution and heated, changes from blue to light green to red/orange in the presence of increasing concentrations of sugar.
Benedict's solution
Watery substance secreted by 3 glands around the mouth. Helps moisten and soften food for swallowing. Contains an enzyme called amylase that begins the digestion of starch
A protein that is capable of speeding up a chemical reaction.
A digestive enzyme that breaks down starch
A thick, sticky substance that lines and protects the inner walls of the digestive organs. Helps the passage of food through the digestive tract and helps protect the walls of the digestive tract from being digested.
A substance that changes in some way to indicate the presence of another substance
A component of gastric juice that helps create the environment that pepsin needs to break down protein in the stomach
hydrochorlic acid
An enzyme in the stomach that breaks down protein
A liquid that includes hydrochorlic acid and pepsin and that is responsible for chemical digestion of protein in the stomach
gastric juices
A pulpy mixture of food and gastric juices. produced in the stomach and passed into the duodenum ( the 1st 25 cm of the small intestine, where most of the chemical digestion takes place)
A painful sensation in the lower esophagus or upper stomach; sometimes caused by excess stomach acid
An open sore or lesion in the skin or mucous membrane in the stomach
The building blocks of proteins
amino acids
Most chemical digestion occurs heres.
Protein digestion begins here
Excess water moves back into the bloodstream from here
large intestine
Diarrhea can occur if the rate of peristalsis is too fast in in this organis
large intestine
Fat is mechanically and chemically digested in this organ
small intestine
Waste is stored in the
This organ has no known function in humans
This organ supplies pancreatic juice
This organ receives bile and pancreatic juice for chemical digestion
small intestine
This organ produces bile
This organ stores bile
gall bladder
This liquid breaks large fat droplets into smaller ones so they can mix with the juices from the small intestine and pancreas
The process by which molecules move from a higher concentration to a lower concentration.
Diffusion without using energy
passive transport
diffusion using energy (ATP)
active transport
These microscopic, finger-like projections that line the inner wall of the small intestine and increase the surface area available for absorption
The process by which digested nutrients pass through the wall of the small intestine into the bloodstream
How do you calulate the surface area of a a solid cube?
Length x width x # of sides= cm2
This structure closes off the trachea as food moves through to the stomach
What is the main source of fuel for your body's cells?
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