Exam 1 Structural Levels Of The Body

Question 1

Chemical level

Answer 1

Is the smallest component.
Includes all atoms and molecules in the body.

Examples of molecules: proteins, carbohydrates, fats, and vitamins.

Question 2

Atoms essential for life?

Answer 2

1. Carbon,2. Hydrogen,3. Oxygen,4. Nitrogen,5. Calcium

Question 3

Cellular level

Answer 3

Molecules combining to form the cellular level.

Ex: muscle cells, nerve cells, blood cells.
Organelles are structural and functional components of cells.

Question 4

Tissue level

Answer 4

Groups of cells that usually arise from common ancestor cells and work together to perform particular function.

Question 5

Basic types of tissues in the body

Answer 5

1. Epithelial, 2. Connective, 3. Muscle,4. Neural

Question 6

Epithelial

Answer 6

Covers body surface.

Lines hollow organs, body cavities and ducts.

Question 7

Connective

Answer 7

Protects and supports the body and its organs.

Binds organs together, stores energy reserves as fat and provides immunity.

Question 8

Muscle

Answer 8

Responsible for movement and generation of force.

Question 9

Nervous

Answer 9

Initiates and transmits action potentials (nerve impulses) that help coordinate body activities.

Question 10

Organ level

Answer 10

Structures that are composed of two or more different tyoes of tissues, have specific functions and usually have recognizable shapes.

Ex: heart, liver, lungs, brain, and stomach.

Question 11

Levels of organization

Answer 11

1. Chemical,2. Cellular,3. Tissue,4. Organ,5. System,6.Organism
   The body consists of several layers of structural organization that are associated with one another.

Question 12

System levels

Answer 12

A system consists of several related organs that have a common function.

Ex: digestive system, which breaks down and absorbs food, include the mouth, pharynx (throat), esophagus, stomach, small intestine, and large intestine.

Question 13

Organismic level

Answer 13

The largest level.

All parts of the body functioning with one another comprise the total organism-one living individual/animal.

Question 14

Cells

Answer 14

Basic structural and functional units of an organism.

Contain specialized structures called organelles

Question 15

Serosa

Answer 15

Outer covering of membraneous (tissue) that protects the stomach and reduces friction when the stomach moves and rubs against other body organs.

Question 16

Muscle tissue layers

Answer 16

Contract to churn and mix food, and push it to the next digestive organ (the small intestine).

Question 17

Epithelial tissue layer

Answer 17

Lining the stomach contributes fluid and chemicals that aid digestion.