1. In the model that you built of the respiratory system, what structures did the straws represent?

A. The trachea and bronchi
B. The lungs
C. The chest cavity and ribs
D. The diaphragm

A. The trachea and bronchi

2. Your hand jerks up after touching a hot stove top. Which two organ systems are most responsible for your reaction?

A. Immune and muscular
B. Nervous and muscular
C. Nervous and respiratory
D. Circulatory and muscular

B. Nervous and muscular

3. The diaphragm can be classified as part of which two organ systems?

A. Immune and skeletal
B. Muscular and nervous
C. Circulatory and respiratory
D. Muscular and respiratory

D. Muscular and respiratory

To which part of the nervous system do the cranial nerves belong?

A. The cerebrum
B. The central nervous system
C. The peripheral nervous system
D. Spinal nerves

C. The peripheral nervous system

If the symbol "->" means "make up", which of the following answer choices correctly demonstrates the relationship between the given terms?

A. Tissues -> organ systems -> cells -> organs
B. Organ systems -> organs -> tissues -> cells
C. Organ systems -> organs -> cells -> tissues
D. Cells -> tissues -> organs -> organ systems

D. Cells -> tissues -> organs -> organ systems

To determine which structures the straws represented in the model of the respiratory system, we can break down the options and reason through them.

A. The trachea and bronchi: The trachea and bronchi are parts of the upper respiratory system that allow air to flow in and out of the lungs. However, straws might not accurately represent their shape and function, so it is unlikely that the straws in the model represented them.

B. The lungs: The lungs are the main organs of the respiratory system responsible for exchanging oxygen and carbon dioxide. It is possible that the straws in the model represented the bronchioles or the smaller airways within the lungs.

C. The chest cavity and ribs: The chest cavity and ribs are structures that protect and enclose the lungs. While straws could potentially be used to represent the ribs, they would not accurately represent the chest cavity.

D. The diaphragm: The diaphragm is a dome-shaped muscle that plays a crucial role in the breathing process. Straws would not typically represent the diaphragm.

Based on the reasoning above, the most likely answer is B. The straws in the model likely represented the bronchioles or the smaller airways within the lungs.