Which of the following best describes the Vasalva maneuver?
A. It is used to dislodge foreign matter from the airway.
B. It prevents food and drink from entering the nasal cavity.
C. It prevents food and drink from entering the trachea.
D. It protects the lungs from overinflation.
E. It increases pressure in the abdominal cavity and helps to expel abdominal contents.
E. It increases pressure in the abdominal cavity and helps to expel abdominal contents.
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A slowly progressive disorder affecting muscle movement and balance, this condition is characterized by stiff posture, tremors, and reduced spontaneity of facial expressions.
A. Amyotrophic lateral sclerosis B. Multiple sclerosis C. Parkinson disease D. Guillain-Barré syndrome E. None of the choices is correct.
Neurons have a _______ membrane potential of -70mV. In other words, this is their stable membrane potential under normal conditions
Fill in the blank with correct word.
What kind of bond is formed when two atoms share electrons?
a. ionic b. covalent c. hydrogen d. isotopic
Reduced hormone concentration in the blood often causes target cells to
A. down-regulate receptors in order to decrease cell sensitivity. B. up-regulate receptors in order to increase cell sensitivity. C. down-regulate receptors in order to increase cell sensitivity. D. up-regulate receptors in order to decrease cell sensitivity.