Leveles Of Organization Ch. 1

Question 1

Chemical Level (first)

Answer 1

Atoms combine to form molecules. The atomic components and unit 3-D shape of molecule determine function.

EX: Protein molecules form filaments that produce the contractions of muscle cells in the heart.

Question 2

Cellular Level (second)

Answer 2

Complex molecules for structures in cells called organelles. Each organelle has specific function.

EX: Energy-producing organelles provide the energy needed for heart muscle cell contractions.

Question 3

Tissue Level (third)

Answer 3

A tissue is a group of cells working together to perform one or more specific functions.

EX: Cardiac muscle cells interact with other types of cells and with materials outside the cell to form cardiac muscle tissue.

Question 4

Organ Level (fourth)

Answer 4

Organs are made of two or more tissues working together top form specific functions.

EX: Layers of cardiac muscle tissue and connective tissue, form the bulk of the wall of the heart (hollow, 3-D).

Question 5

Organ System Level (fifth)

Answer 5

A group of organ interacting to perform a particular function.

EX: The heart contracts, pushing cloud into the blood vessel network; these make up the cardiovascular system. Functions to deliver O2 and nutrients throughout body.

Question 6

Organism Level (sixth)

Answer 6

An individual life form.

EX: An individual human is highest level of organization. All organ systems must work together to maintain life & health of organism.