Negative-pressure ventilation occurs when:
A) the diaphragm ascends and the intercostal muscles retract.
B) air is drawn into the lungs when intrathoracic pressure decreases.
C) pressure within the chest decreases and air is forced from the lungs.
D) the phrenic nerves stop sending messages to the diaphragm.
Answer: B) air is drawn into the lungs when intrathoracic pressure decreases.
You might also like to view...
Cancer cells can be detected by NK cells when they show
A) interferons. B) complement proteins. C) tumor-specific antigens. D) opsonization. E) CD4 markers.
The movement of fluids between cellular compartments ________.
A) requires active transport B) is regulated by osmotic and hydrostatic forces C) requires ATP for the transport to take place D) involves filtration
Match the term with the correct definition or explanation.
a. hypothesis b. scientific method c. theory d. experimentation e. control group f. test group 1. _____ A hypothesis that has been supported by repeated testing and has gained a high level of confidence 2. _____ A systematic approach to discovery 3. _____ A group that does not get what is being tested 4. _____ A reasonable guess based on previous informal observations 5. _____ A process used to test a hypothesis 6. _____ A group that receives what is being tested
Carbohydrate digestion takes place in the ____________________ (what part?) of the stomach under the influence of ____________________ (what enzyme?)
Fill in the blank(s) with correct word