The _____________ buffer system is the primary intracellular buffer, whereas the _____________ buffer system is the primary buffer against carbonic acid changes
Fill in the blank(s) with correct word
protein, hemoglobin
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A child hanging upside down from a tree takes a bite from a candy bar. They manage to chew the candy and swallow it successfully. What prevents the bolus from entering the upper part of the nasopharynx?
A. The most anterior section of the nasopharynx is only connected to the oropharynx by small ducts, so the bolus cannot enter it. B. During the swallowing reflex, the tongue presses against the soft palate and forces the nasal region of the nasopharynx shut. C. Muscles immediately pull the pharynx upward toward the bolus in the swallowing reflex and suck it from the back of the tongue. D. The posterior part of the tongue and the anterior section of the pharynx also undergo peristalsis, so the food is immediately pushed downward.
In the ascending limb of the loop of Henle the ________.
A) thin segment is freely permeable to water B) thick segment is permeable to water C) thin segment is not permeable to sodium and chloride D) thick segment moves ions out into interstitial spaces for reabsorption
Explain the two reasons why graded potentials lose strength as they move through the cell. Why don't action potentials lose strength?
What will be an ideal response?
If sleep apnea is due to __________, it could involve temporary closure of any portion of the __________ airway.
A. airway obstruction; upper B. airway obstruction; lower C. neurological problems; lower D. neurological problems; upper