Levels of Organization
Question: What is the smallest living unit of the human body?
A. Organ
B. Cell
C. Tissue
D. Organ System
B. Cell
Question: Which system pumps and transports blood throughout the body?
A. Circulatory
B. Digestive
C. Nervous
D. Skeletal
A. Circulatory
Question: Which organ pumps blood?
A. Lungs
B. Brain
C. Heart
D. Stomach
C. Heart
Question: How should you carry a microscope?
A. By the eyepiece
B. With one hand
C. With two hands supporting the arm and base
D. By the stage
C. With two hands supporting the arm and base
Question: Which two systems work together to move your body?
A. Digestive and Excretory
B. Muscular and Skeletal
C. Nervous and Digestive
D. Respiratory and Excretory
B. Muscular and Skeletal
Question: What is a group of similar cells working together called?
A. Tissue
B. Organ
C. Organism
D. Organ System
A. Tissue
Question: Which system exchanges oxygen and carbon dioxide?
A. Excretory
B. Respiratory
C. Muscular
D. Digestive
B. Respiratory
Question: Which organ helps break down food?
A. Stomach
B. Kidney
C. Brain
D. Heart
A. Stomach
Question: Which objective lens should you start with?
A. Highest power
B. Lowest power
C. Any power
D. No objective lens
B. Lowest power
Question: Which two systems work together to deliver oxygen to body cells?
A. Respiratory and Circulatory
B. Skeletal and Digestive
C. Muscular and Excretory
D. Nervous and Skeletal
A. Respiratory and Circulatory
Question: Which sequence shows the correct order of organization?
A. Organ → Cell → Tissue → Organ System
B. Cell → Organ → Tissue → Organ System
C. Cell → Tissue → Organ → Organ System
D. Tissue → Cell → Organism → Organ
C. Cell → Tissue → Organ → Organ System
Question: Which system breaks down food and absorbs nutrients?
A. Skeletal
B. Nervous
C. Digestive
D. Respiratory
C. Digestive
Question: Which organ controls and coordinates many body activities?
A. Liver
B. Brain
C. Lungs
D. Bladder
B. Brain
Question: What should you use to clean a microscope lens?
A. Paper towel
B. Shirt sleeve
C. Lens paper
D. Regular tissue
C. Lens paper
Question: Which two systems work together to remove wastes from the blood through the kidneys?
A. Muscular and Respiratory
B. Digestive and Skeletal
C. Circulatory and Excretory
D. Nervous and Muscular
C. Circulatory and Excretory
Question: Why is the heart considered an organ?
A. It contains only one cell
B. It is made of different tissues working together
C. It is an entire organ system
D. It contains only muscle tissue
B. It is made of different tissues working together
Question: Which system detects information and coordinates the body's responses?
A. Muscular
B. Nervous
C. Excretory
D. Circulatory
B. Nervous
Question: Which organs filter blood and produce urine?
A. Lungs
B. Kidneys
C. Intestines
D. Muscles
B. Kidneys
Question: Which statement is a scientific observation?
A. The cell is sick
B. The cell looks purple
C. The cell is hungry
D. The cell is growing rapidly
B. The cell looks purple
Question: After eating, which two systems help nutrients reach body cells?
A. Nervous and Skeletal
B. Digestive and Circulatory
C. Respiratory and Muscular
D. Skeletal and Excretory
B. Digestive and Circulatory
Question: What could happen if many cells in the heart became damaged?
A. Only the skin would be affected
B. Nothing would change
C. The heart might have trouble pumping blood
D. The lungs would disappear
C. The heart might have trouble pumping blood
Question: Which system filters blood to remove wastes and excess water?
A. Digestive
B. Skeletal
C. Respiratory
D. Excretory
D. Excretory
Question: Which structure protects the brain?
A. Rib Cage
B. Spine
C. Skull
D. Pelvis
C. Skull
Question: A microscope has a 10× eyepiece and a 40× objective lens. What is the total magnification?
A. 50×
B. 400×
C. 4×
D. 40×
B. 400×
Question: If the heart cannot pump blood effectively, why might muscles become weak?
A. Bones stop growing
B. Muscles receive less oxygen and nutrients
C. The stomach stops making food
D. The brain stops containing cells
B. Muscles receive less oxygen and nutrients