Unit B: Cells and Systems Flashcards

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1
Q

What is the organization of cells?

A

Cells → Tissues → Organs → Organ Systems → Organism

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2
Q

Classify organisms.

A

made up of at least one cell, a living thing, has an organized structure, can react to stimuli, reproduce, grow, and adapt.

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3
Q

What is a cell? What is it’s role?

A

The basic unit of life. (All living things have it.) It performs all the functions necessary for life like growth, digestion, respiration, excretion, and reproduction.

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4
Q

What’s the difference between unicellular and multicellular organisms?

A

Unicellular - unicellular organism depends upon just one cell.
Multicellular - has cells specialized to perform different functions.

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5
Q

What’s the difference between a plant and animal cell?

A

Plants have root system, xylem and the phloem while animals have connective, epithelial, muscle and nervous tissues.

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6
Q

What is diffusion and osmosis?

A

Diffusion - movement of particles of a substance from an area of higher concentration to an area of lower concentration.
Osmosis - diffusion of water through membranes with very small openings.

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7
Q

What are organs and tissues? Give one example each and their role.

A

Organs - a collection of tissues joined in a structural unit to serve a common function. i.e. kidneys - remove wastes, and acid, and neutralize body fluids.
Tissues - a group of cells with similar shape and function. i.e. Phloem - transports carbohydrates, produced by photosynthesis

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8
Q

What is the function of a cell membrane?

A

Regulates the transport of materials entering and exiting the cell.

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9
Q

What are the 5 different body systems?

A

Respiratory, circulatory, digestive, excretory, and nervous/sensory system.

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10
Q

What is the function of each body system?

A

Respiratory - Breathing
Circulatory - Blood Circulation
Digestive - Process Food
Excretory - Removes Waste
Nervous - Communication between all body systems

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11
Q

What is a stimulus?

A

Any change in an organism’s environment that causes the organism to react.

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12
Q

Give 3 examples of health and environmental factors.

A

Asthma, Bronchitis, Smoking Cigarettes, Ulcers, Scurvy, etc.

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