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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

The number of electrons is equal to the number of what?

Protons