How the Body System Works

What is the correct hierarchical organization of the human body from the simplest to the most complex?

• Organs -> Tissues -> Cells -> Organ Systems -> Organism

• Cells -> Tissues -> Organs -> Organ Systems -> Organism

• Tissues -> Cells -> Organs -> Organ Systems -> Organism

• Cells -> Organs -> Tissues -> Organ Systems -> Organism

What is the primary function of the circulatory system?

• To break down food into nutrients.

• To control breathing rate and gas exchange.

• To transport materials cells need and remove waste products.

• To provide structural support and movement.

Which component of blood is responsible for fighting infections?

• Red blood cells

• Platelets

• Plasma

• White blood cells

Where does the primary gas exchange (oxygen into blood, carbon dioxide out of blood) occur in the respiratory system?

• Trachea

• Bronchi

• Alveoli

• Lungs (as a whole)

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Which part of the digestive system is primarily responsible for absorbing remaining water and processing waste materials for elimination?

• Small intestine

• Stomach

• Large intestine

• Pancreas

Which part of the brain is responsible for automatic functions like breathing and heart rate?

• Cerebrum

• Cerebellum

• Brainstem

• Spinal cord

What type of neurons carry commands from the brain to muscles and organs?

• Sensory neurons

• Motor neurons

• Interneurons

• Autonomic neurons

During exercise, how do the digestive and circulatory systems respond to support the body's increased activity?

• The digestive system increases activity, and the circulatory system decreases heart rate.

• The digestive system reduces activity and redirects blood flow, while the circulatory system increases heart rate.

• Both the digestive and circulatory systems increase their activity.

• Both the digestive and circulatory systems reduce their activity.