Q1. Normal, quiet exhalation needs which of the following muscles to contract? a. scalenes b. diaphragm c. intercostals d. none of the above Q2. Which of the following pressure differences will keep your lungs inflated at rest? a. pleural cavity pressure < pressure inside lung b. pleural cavity pressure > pressure inside lung c. pleural cavity pressure < atmospheric pressure d. pleural cavity pressure > atmospheric pressure
Added by Paul M.
Step 1
Normal, quiet exhalation needs which of the following muscles to contract? Answer: d. none of the above. Normal, quiet exhalation is a passive process that does not require any muscle contraction. The relaxation of the diaphragm and intercostal muscles allows the Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 81 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A normal expiration during quiet breathing: Select one: a. is an active process involving muscle contraction. b. occurs when the diaphragm and external intercostal muscles relax. c. is not affected by the elastic properties of the lungs. d. requires more muscle contractions than inspiration. e. occurs due to the contraction of the diaphragm and elevation of the ribs. After hyperventilating for several minutes: Select one: a. blood pH would drop and inhibit inspiration. b. blood pH will rise and stimulate expiration. c. O2 in the lungs has not had time to diffuse into the blood. d. the level of O2 has increased and inhibits the inspiratory center. e. the level of CO2 decreases below the level necessary to stimulate the inspiratory center.
Sri K.
6. Which of the following muscles contract to promote exhalation or forced expiration (breathing out)? Select any appropriate answers: - diaphragm - external oblique and internal oblique muscles of the abdomen - external intercostal muscles - transversus abdominis muscle - internal intercostal muscles 7. The glottis is: Select any appropriate answers: - the answer is not listed - a flap of elastic tissue separating the left and right nasal cavities - the opening to the esophagus - the soft tissue that hangs at the end of the soft palate - the opening or slit in the trachea through which air will pass before it can enter the lungs
In the human gas exchange system, a. the lungs and airways are completely collapsed after a forceful exhalation. b. exhalation is driven by contraction of the diaphragm. c. the $\mathrm{P}_{\mathrm{O}_{2}}$ of the blood leaving the lungs is greater than that of the exhaled air. d. the amount of air that is moved per breath during normal, at-rest breathing is termed the total lung capacity. e. $P_{C O_{2}}$ in the air reaching the alveoli during inhalation is close to zero, as it is in the outside air.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD