#1
What is the smallest level of organization in a multicellular organism?
A cell
What is the process by which unspecialized cells become specialized?
Cellular diffrentation
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What is the difference between embryonic stem cells and tissue stem cells?
Embryonic stem cells can become any cell type; tissue stem cells can only become certain types.
What level of organization is made of different tissues working together for a specific function?
Organ
Which tissue type sends electrical signals throughout the body?
Nerve Tissue
Which tissue type is responsible for movement?
Muscle tissue
Where does digestion begin?
The mouth
Which organ produces bile to help break down fats?
The liver
Which organ mainly absorbs nutrients?
The small intensine
What level of organization is made of similar cells working together?
Tissue
What gas does the body need to survive?
Oxygen
What tiny air sacs in the lungs allow gas exchange?
Alveoli
What test measures the electrical activity of the heart?
Electrocardiogram
Which blood cells carry oxygen?
Red blood cells
What organ pumps blood through the body?
The heart
Put these in order from simplest to most complex: organ, organism, cell, tissue, organ system.
Cell → Tissue → Organ → Organ System → Organism
What muscle beneath the lungs helps you breathe?
The diapghram
What process moves oxygen from high concentration in the alveoli to lower concentration in the blood?
Diffusion
ALVEOLI are large air sacs meant for animal and plant cells
FALSE
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Coronary arteries are the blood
vessels that provide blood to the heart muscle tissue itself. These
True or false?
TRUE
Why are stem cells important in treating leukemia?
They can replace damaged bone marrow cells and produce healthy blood cells.
Why do single-celled organisms not have a hierarchy of organization?
Because they are made of only one cell and do not have tissues, organs, or organ systems.
Why is mucus important in the digestive tract?
It protects the lining from enzymes and allows food to move smoothly.
Explain how the respiratory and circulatory systems work together.
A: The respiratory system brings oxygen into the lungs, where it diffuses into the blood. The circulatory system transports the oxygen to body cells and carries carbon dioxide back to the lungs.