Study: Chapter 1 through 7

Biology is the study of life (both living and non-living) and the environment which they live?

• True

• False

Joined together to form molecules

• Organisms

• Atoms

• Populations

• Cells

Small structural and functional unit of an organism

• Cells

• Protons

• Atoms

• Molecules

Protons have what type of charge?

• Positive

• Neutral

• Negative

Which is NOT a characteristic of living organisms?

• All living things are capable to be generated from non living matter and energy

• Regulate their internal enviroments

• Use a universal molecular code

• Made up of cells

Place in order: A) Cells B) Organs C) Organisms D) Tissues E) Organ Systems

• A, B, E, D C

• A, B, E, C, D

• A, D, B, E, C

• D, A, E, B, C

A pure substance that contains only 1 CERTAIN type of atom?

• Living organisms

• Tissue

• Molecule

• Element

A characteristic of ALL living organisms is they acquire materials and energy from their environment

• False

• True

Paracrine Signals diffuse to...

• Cells that make them

• Cells that nearby

• Cells next to or adjacent to them

Connection between adjacent cells spanned by connexins that permit chemical substances or electrical signals to pass from cell to cell

• Gap Junctions

• Paracrine Signals

• Second messenger

• G-Proteins