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A&P 2 Exam 4 Respiratory and Digestive System Questions and Answers
Terms in this set (39)
What part of the tooth bears the force of chewing?
From the esophagus to the anal canal, the walls of every organ of the alimentary canal are made up of the same four basic layers. Arrange them in order from the lumen.
mucosa, submucosa, muscularis externa, and serosa
Select the statement that is true concerning permanent teeth.
There are 32 primary teeth, and people have molar teeth in both upper and lower jaws.
The capillaries that nourish the epithelium and absorb digested nutrients lie in the ________.
As the tension of vocal folds in the larynx increase, the voice becomes __________________
higher in pitch
Which of the choices below determines the direction of respiratory gas movement?
partial pressure gradient
Inspiration occurs when the _____________ is less than the ___________________.
intrapulmonary pressure; atmospheric pressure
Which of the choices below describes the forces that act to pull the lungs away from the thorax wall and thus collapse the lungs?
the natural tendency for the lungs to recoil and the surface tension of the alveolar fluid
In the plasma, the quantity of oxygen in solution is ________.
only about 1-2% of the oxygen carried in blood
Surfactant helps to prevent the alveoli from collapsing by ________.
interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid
Intrapulmonary pressure is the ________________.
pressure within the alveoli of the lungs
Which of the following is true regarding normal quiet expiration of air?
it is a passive process that depends on the recoil of elastic fibers that were stretched during inspiration.
Air moves out of the lungs when the pressure inside the lungs is _________________.
greater than the pressure in the atmosphere
The walls of the alveoli are composed of two types of cells, type I and type II. The function of type II is to ________.
Which of the following is NOT true about the gas exchange between the lungs and blood?
gases must pass through the layer of smooth muscle cells
Select the correct statement about the physical factors influencing pulmonary ventilation.
As alveolar surface tension increases, additional muscle action will be required
For inspiration of air, which of the following happens first?
diaphragm descends, thoracic volume begins to increase, and rib cage rises
which structure is lined with simple squamous epithelium?
The larynx contains ________.
The splanchnic circulation refers to the arteries that serve the digestive organs and the veins that carry blood from the digestive organs to the liver.
The function of the hepatic portal circulation is to ________.
collect absorbed nutrients for metabolic processing in the liver
All the chemical and mechanical phases of digestion from the mouth through the small intestine are directed toward changing food into forms that can pass through the epithelial cells lining the mucosa into the underlying blood and lymphatic vessels.
function of goblet cells is to _________________.
produce mucus that protects parts of the digestive organs from the effects of powerful enzymes needed for food digestion
The chemical and mechanical processes of food breakdown are called ______________________.
Which of the following statements is true?
central chemoreceptors sample CO2 in the CSF for adjusting the respiration rate
The functions of the nasal conchae are to enhance the air turbulence in the cavity and to increase the mucosal surface area exposed to the air.
intrapleural pressure is normally more than the pressure in the alveoli.
The paired lungs occupy all of the thoracic cavity.
The loudness of a person's voice depends on the ________.
force with which air rushes across the vocal folds
Atelectasis (lung collapse) renders the lung useless for ventilation.
Smoking diminishes ciliary action and eventually destroys the cilia.
The parietal pleura lines the thoracic wall.
A normal percentage for the peripheral capillary oxygen saturation level is _____________________.
The enteric nervous system innervates the respiratory system and is fundamental to the function of the respiratory system.
All of the following are parts of the alimentary canal EXCEPT _____________________.
The nerve plexus innervating the tooth is found in _____________________.
The tissue solubility of the nitrogen gas that we are breathing increases as we dive deeper in the water.
Hepatic portal vein carries oxygen-rich blood from the digestive system to the liver.
All of the followings are parts of the accessory digestives system EXCEPT ___________________.
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