Problem:OPTIONS:
- skin
- deltas
- blood
- atoms
- waves
- sleep
- genes
- breathe

Fact 1: Endocrine hormones travel throughout the body in the blood. Fact 2: Endocrine cells secrete hormones. Given the two facts above, cells that secrete hormones travel throughout the body in what?
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A: blood

Problem:OPTIONS:
- heating liquids
- Protons
- chemical messengers
- enormous damage to homes
- Combustion
- transportation technology
- Electric generators
- Food

Fact 1: Atoaster converts electrical energy into heat energy for toasting. Fact 2: Electric generators convert mechanical energy into electric energy. Given the two facts above, toasters can get energy from what?
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A: Electric generators

Problem:OPTIONS:
- perspiration
- breathing
- heat energy
- animals
- blood pH
- Most plants
- hyperventilating
- sweating

Fact 1: Blood pH may become unbalanced if the rate of breathing is too fast or too slow. Fact 2: Slow and fast respirations or long periods without a breath are common in the dying child. Given the two facts above, what is affected by too fast or slow respirations?
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A: blood pH

Problem:OPTIONS:
- the respiratory system
- a breathing mask
- bronchodilatory treatment
- aqueous solution
- immunotherapy
- radiation therapy
- immune system
- chemotherapy

Fact 1: Pneumonia may be caused by an infection or injury of the lungs. Fact 2: Lung injuries are treated with bronchodilatory treatment. Given the two facts above, what treatment can be used in treating pneumonia?
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A:
bronchodilatory treatment