APHY 102 Exam 4 Questions and Answers
what enhances turbulence in the inhaled air?
nasal conchae
what structure seals the larynx when we swallow?
epiglottis
what is the conducting zone structure?
terminal bronchiole
what part of the lung receives air directly from a segmental (tertiary) bronchus?
bronchopulmonary segment
what vessel delivers oxygenated systemic blood to lung tissue?
bronchial artery
what event occurs first during inspiration?
the diaphragm contracts
what happens during quiet expiration?
the dome-shaped diaphragm rises as the inspiratory muscles relax
what respiratory volume/capacity refers to the total amount of exchangeable air?
vital capacity
what is internal respiration?
carbon dioxide diffuses from the tissue cells to blood
when is hemoglobin most saturated with oxygen?
at sea level in the lungs
what is the function of the respiratory system in the brain stem?
the ventral respiratory group appears to generate the basic respiratory rhythm.
what happens when arterial PCO2 increases?
excitation of central chemoreceptors in the brain stem
what would result in cutting the phrenic nerves?
paralysis of the diaphragm
what laryngeal cartilages are paired?
epiglottis and cricoid
, what initiates the inflation reflex?
overinflation of the alveoli and bronchioles
what is the detergent-like substance that keeps the alveoli from collapsing between breaths?
surfactant
what determines the direction of gas movement?
partial pressure gradient
what happens when the inspiratory muscles contract?
the site of the thoracic cavity increases in length and diameter
what provides the nutrient blood supply of the lungs?
the bronchial arteries
what allows oxygen and carbon dioxide to exchange in the lungs?
diffusion
oxygen carried in the blood is what?
chemically combines with heme in red blood cells
what has the greatest stimulating effect on the respiratory centers in the brain?
carbon dioxide
what is the major site for nutrient absorption?
small intestine
what does the enteric nervous system do?
provides nerves for the alimentary canal
what does the visceral peritoneum cover?
digestive organs
what does the hepatic portal do?
collects blood from the GI tract and takes it to the liver
what is the serosa?
the outermost layer of the alimentary canal
what is the mucosa?
the main site of nutrient absorption
what enhances turbulence in the inhaled air?
nasal conchae
what structure seals the larynx when we swallow?
epiglottis
what is the conducting zone structure?
terminal bronchiole
what part of the lung receives air directly from a segmental (tertiary) bronchus?
bronchopulmonary segment
what vessel delivers oxygenated systemic blood to lung tissue?
bronchial artery
what event occurs first during inspiration?
the diaphragm contracts
what happens during quiet expiration?
the dome-shaped diaphragm rises as the inspiratory muscles relax
what respiratory volume/capacity refers to the total amount of exchangeable air?
vital capacity
what is internal respiration?
carbon dioxide diffuses from the tissue cells to blood
when is hemoglobin most saturated with oxygen?
at sea level in the lungs
what is the function of the respiratory system in the brain stem?
the ventral respiratory group appears to generate the basic respiratory rhythm.
what happens when arterial PCO2 increases?
excitation of central chemoreceptors in the brain stem
what would result in cutting the phrenic nerves?
paralysis of the diaphragm
what laryngeal cartilages are paired?
epiglottis and cricoid
, what initiates the inflation reflex?
overinflation of the alveoli and bronchioles
what is the detergent-like substance that keeps the alveoli from collapsing between breaths?
surfactant
what determines the direction of gas movement?
partial pressure gradient
what happens when the inspiratory muscles contract?
the site of the thoracic cavity increases in length and diameter
what provides the nutrient blood supply of the lungs?
the bronchial arteries
what allows oxygen and carbon dioxide to exchange in the lungs?
diffusion
oxygen carried in the blood is what?
chemically combines with heme in red blood cells
what has the greatest stimulating effect on the respiratory centers in the brain?
carbon dioxide
what is the major site for nutrient absorption?
small intestine
what does the enteric nervous system do?
provides nerves for the alimentary canal
what does the visceral peritoneum cover?
digestive organs
what does the hepatic portal do?
collects blood from the GI tract and takes it to the liver
what is the serosa?
the outermost layer of the alimentary canal
what is the mucosa?
the main site of nutrient absorption
