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Section 3.2
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1
Which type of medical imaging technology directs high frequency sound waves at a specific part of the body to create an image?
A)x-ray
B)medical sonography
C)CAT scan
D)MRI scan
2
What is the difference between an x-ray and a CAT scan?
A)An x-ray creates a single image on photographic film. A CAT scan shows real-time movement of body parts that can be observed on a monitor.
B)An x-ray transmits a wavelength of electromagnetic radiation through the body to create an image on film. A CAT scan uses radio signals in a magnetic field to create images.
C)An x-ray is used to create an image of a larger area of the body. A CAT scan is used to create a more defined three-dimensional image of a very thin slice of the body.
D)An x-ray uses electromagnetic radiation to create a three-dimensional image on photographic film. A CAT scan uses radio signals to create a three-dimensional image of the body part.
3
Which organ system in the human body is responsible for the transportation of nutrients, gases, wastes, and blood?
A)circulatory system
B)respiratory system
C)excretory system
D)immune system
4
What role do gastric juices play in the digestive system?
A)After a piece of food enters the mouth, gastric juices found in saliva start the chemical breakdown of the food.
B)When food passes through the pharynx into the esophagus, gastric juices are used to break down the food into small chunks before it reaches the stomach.
C)When food passes from the esophagus into the stomach, gastric juices lining the stomach sense the presence of food and signal the stomach’s muscle to mix the contents and begin a mechanical breakdown.
D)When food reaches the stomach, gastric juices are released and the pieces of food are surrounded and chemically broken down.
5
What role does the left ventricle play in the circulatory system?
A)The left ventricle receives blood from the body.
B)The left ventricle receives blood from the lungs.
C)The left ventricle pumps blood to the rest of the body.
D)The left ventricle pumps blood to the lungs.
6
What is the function of the nasal cavity in the respiratory system?
A)The nasal cavity carries air to the lungs.
B)The nasal cavity filters and moistens incoming air.
C)The nasal cavity prevents food from entering the trachea.
D)The nasal cavity carries air to the alveoli.





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