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Worksheetsessential physiology ( resp system )
Total questions: 10
Worksheet time: 5mins
how does mucus contribute to lung protection?
mucus helps to absorb nutrients in the lungs
mucus prevents bacteria from attaching to the epithelium
mucus serves as a barrier to oxygen absorption
mucus increases the amount of air entering the lungs
what is one of the conditions that the juxtapulmonary capillary receptors react to?
cardiac arrest
bone fractures
alveolar inflammation
skin infections
what role do accessory inspiratory muscles play in deeper inspiration?
they help to further enlarge the thoracic cavity
they restrict diaphragm movement
they reduce airflow
they decrease lung volume
what occurs when the internal intercostal muscles contract during passive expiration?
the abdominal muscles relax, decreasing abdominal pressure
the diaphragm contracts, pushing air into the lungs
the ribs and sternum flatten, reducing thoracic cavity dimensions
the ribs and sternum expand, increasing thoracic cavity dimensions
which muscles must relax to allow for exhalation during breathing?
abdominal muscles
internal intercostal muscles
pectoral muscles
external intercostal muscles
what is the primary function of gas exchange in the body?
to absorb vitamins from food consumed
to filter toxins from the blood before it returns to the heart
to facilitate the transfer of oxygen and carbon dioxide between blood and cells
to transport nutrients from the digestive system to cells
what causes surface tension in the alveoli?
fluid layer lining the alveoli (surfactant)
tissue elasticity
air pressure inside the alveoli
environmental pollutants
what nerve transmits signals from the stretch receptors to the medulla to stop inspiration?
the spinal nerve
the sciatic nerve
the phrenic nerve
the vagus nerve
what role do aortic and carotid sinus baroreceptors play in the body?
they increases the heart rate only during exercise
they help regulate heart and ventilatory rates in response to blood pressure changes
they only regulates blood sugar levels
they have no effect on respiratory function
what differentiates peripheral chemoreceptors from baroreceptors?
peripheral chemoreceptors are specifically sensitive to oxygen levels
peripheral chemoreceptors monitor blood pressure
baroreceptors react only to temperature changes
baroreceptors are sensitive to oxygen levels
