Flashcards in Chapter 2 Deck (152)
At a cellular level, biology becomes what?
What are a cell's working parts called?
Chemistry considers how what changes?
The composition of substances.
Put body functions, chemical changes, and cellular changes in the proper order.
Chemical changes > cellular changes > body functions.
Foods, liquids and medicines are all an example of what?
Important in explaining physiological processes, developing new drugs.
Anything that has weight (mass)
Solids, liquids, gasses are examples of what?
Matter consists of what?
How many naturally occurring elements are there?
How many lab created elements are there?
Some elements exist in pure form, but some are what?
Compounds (chemical elements)
What are required by the body in large quantities?
Bulk elements make up how much of human body weight?
More than 95%.
What is required in small amounts?
What are the proteins that regulate rates of chemical reactions called?
What is required by the body in very small amounts?
Ultra trace elements
What are the particles that compose elements called?
The smallest complete unit of an element is what?
What binds atoms?
What is the central part of an atom?
What constantly moves around a nucleus?
What is relatively large and has a positive charge?
What is relatively large, and uncharged?
What carries a single negative charge?
What carries a single positive charge?
What is uncharged and neutral?
Why is the nucleus part of an atom always positively charged?
It contains protons.