Flashcards in Chapter 2 Deck (152)
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2
At a cellular level, biology becomes what?
Chemistry
3
What are a cell's working parts called?
Organelles
4
Chemistry considers how what changes?
The composition of substances.
5
Put body functions, chemical changes, and cellular changes in the proper order.
Chemical changes > cellular changes > body functions.
6
Foods, liquids and medicines are all an example of what?
Chemicals
7
Important in explaining physiological processes, developing new drugs.
Biochemistry
8
Anything that has weight (mass)
Matter
9
Solids, liquids, gasses are examples of what?
Matter
10
Matter consists of what?
Particles
11
Fundamental substances
Elements
12
How many naturally occurring elements are there?
92
13
How many lab created elements are there?
26
14
Some elements exist in pure form, but some are what?
Compounds (chemical elements)
15
What are required by the body in large quantities?
Bulk elements
16
Bulk elements make up how much of human body weight?
More than 95%.
17
What is required in small amounts?
Trace elements
18
What are the proteins that regulate rates of chemical reactions called?
Enzymes
19
What is required by the body in very small amounts?
Ultra trace elements
20
What are the particles that compose elements called?
Atoms
21
The smallest complete unit of an element is what?
An atom
22
What binds atoms?
Chemical bonds
23
What is the central part of an atom?
The nucleus
24
What constantly moves around a nucleus?
Electrons
25
What is relatively large and has a positive charge?
Protons
26
What is relatively large, and uncharged?
Neutrons
27
What carries a single negative charge?
Electrons
28
What carries a single positive charge?
Protons
29
What is uncharged and neutral?
Neutrons
30
Why is the nucleus part of an atom always positively charged?
It contains protons.
31
