Air moves into the alveoli as a result of the: (A)Decreased pressure in the chest cavity (B) Relaxation of the diaphragm (C) Rising pressure in the alveoli (D) Rising pressure in the chest cavity

Q: Explain how a change in lung dimensions causes a change in alveolar pressure?

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Q: In which situations does forced expiration against a closed or narrowed airway occur?

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Q: What is the difference between the body surface pressure (Pbs)* and the alveolar pressure (Palv)?

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Q: inhale, does air flow into the lungs, causing them to expand? Or do the lungs expand, causing air to…

A: The breathing is also called as pulmonary ventilation. It involves two processes- the flow of air…

Q: Why does lowering the surface tension makes it easier for the alveoli to expand during inflation?

A: Surface tension of a liquid is the force of cohesion of molecules in the liquid. It is the surface…

Q: List the factors that determine the precise value of alveolar PO?

A: Alveolar PO stands for the partial pressure of the oxygen. The partial pressure can be defined as…

Q: Beginning with the alveolar space, place the following layers of the respiratory membrane into the…

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Q: (a) In humans, is there one pleural cavity surrounding both lungs or two separate pleural cavities,…

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Q: The muscles attached to the ribcage and the diaphragm control the lungs'... a.) volume b.) pressure…

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Q: Identify the structures of the respiratory system in the following figure:

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Q: In both lungs, the surface that is the largest is the (a) costal, (b) mediastinal, (c) inferior…

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Q: What is the significance of the two membranes which surround the lungs?  Between these membranes…

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Q: Under ordinary circumstances, the inflation reflex is initiated by (a) noxious chemicals, (b) the…

A: The Hering-Breuer inflation reflex represents the reflex used in stopping the excessive inflation of…

Q: Identify this airway (marked by the asterisk) Choose from the following: (A) trachea (B) primary…

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Q: You measure Mr. Johnson's respirations(rate of breathing) as 16 breaths in 30 seconds. What would…

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A:

Q: When individuals are hyperventilating, they are told to breathe into a paper bag or into their…

A: The body of humans consists of a number of systems that work together to maintain the homeostasis of…

Q: (a) Define hyperventilation. (b) If you hyperventilate, do you retain or expel more carbon dioxide?…

A: Pulmonary ventilation is a process by which gases are exchanged between the atmosphere and the lung…

Q: Gas exchange in the lungs takes place in the (a) alveoli, (b) bronchioles, (c) segmental bronchi,…

A: The respiratory system is a biological system responsible for gas exchange in our body. It consists…

Q: Fill in the space with the appropriate word from the word-bank below; causing During inhalation, the…

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Q: According to Laplace's Law:

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Q: Explain the two general features that breathing organs share, which optimize gas exchange.

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Q: Does oxygen diffuse from the alveoli into the pulmonary capillary blood?

A: Diffusion is defined as the movement or transfer of a substance (either liquid or gas) from a high…

Q: Trace the path of air from the nose to the alveoli

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Q: Why does the inspiratory muscles prevent the lungs from collapsing?

A: The primary inspiratory muscles are the diaphragm and external intercostals. In order to promote…