Unit 3: Organisms Systems and Functions

Which of the following best describes how the human body is organized into systems?

• The body is a single system with no subsystems.

• The body is a system of interacting subsystems composed of groups of cells.

• The body is composed of independent systems that do not interact.

• The body is a system of organs that function independently.

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What is the primary role of photosynthesis in the ecosystem?

• To produce oxygen for animals to breathe.

• To convert solar energy into chemical energy stored in glucose.

• To decompose organic matter.

• To provide water for plants.

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Which of the following processes describes how food is rearranged through chemical reactions in the body?

• Photosynthesis

• Cellular respiration

• Fermentation

• Digestion

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Which of the following is a product of photosynthesis?

• Carbon dioxide

• Water

• Glucose

• Nitrogen

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What happens to glucose during cellular respiration?

• It is converted into oxygen.

• It is broken down to release energy.

• It is stored as fat.

• It is used to build proteins.

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How do the circulatory and respiratory systems work together to maintain homeostasis?

• The circulatory system delivers carbon dioxide to the respiratory system for exhalation.

• The respiratory system provides oxygen to the circulatory system, which distributes it to tissues.

• The circulatory system regulates the breathing rate of the respiratory system.

• The respiratory system supplies nutrients to the circulatory system.

Which of the following best explains how the circulatory and respiratory systems interact?

• The circulatory system provides nutrients to the respiratory system.

• The respiratory system supplies oxygen to the circulatory system, which transports it to cells.

• The circulatory system removes waste from the respiratory system.

• The respiratory system controls the heart rate of the circulatory system.

What is the main source of energy for photosynthesis?

• Chemical energy

• Solar energy

• Mechanical energy

• Thermal energy

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Anika just ate a healthy meal. How do her digestive and circulatory systems work together to provide nutrients to her body?

• The digestive system breaks down food, and the circulatory system transports nutrients to cells.

• The circulatory system breaks down food, and the digestive system transports nutrients to cells.

• Both systems independently provide nutrients to the body.

• The digestive system stores nutrients, and the circulatory system uses them as needed.

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How do the digestive and circulatory systems work together to provide nutrients to the body?

• The digestive system breaks down food, and the circulatory system transports nutrients to cells.

• The circulatory system breaks down food, and the digestive system transports nutrients to cells.

• Both systems independently provide nutrients to the body.

• The digestive system stores nutrients, and the circulatory system uses them as needed.

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