Receptor potentials can be graded, with a stronger stimulus resulting in a larger receptor potential
Indicate whether the statement is true or false
T
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__________ are small circumscribed elevations of skin containing pus
Fill in the blank(s) with correct word
The tonicity of a solution refers to the effect that the ____
a. solute has on ion volume when the solution surrounds the ions b. solution has on cell mass when the solution surrounds the cell c. solution has on cell volume when the solution surrounds the cell d. solvent has on cell mass when the solution surrounds the cell e. solution has on ion mass when the solution surrounds the ions
The normal partial pressure differences between inspired air and alveolar gas for O2, CO2, H2O, and N2 can be explained because of ________.
A. net movements of CO2 toward the alveoli with net movements of O2 and H2O into the capillaries B. net movement of CO2 and N2 toward the alveoli and H2O movements toward the alveoli as respiratory water C. net movements of CO2 toward the alveoli, O2 toward the alveoli, and H2O is added along the respiratory tract D. net movements of CO2, O2, and H2O into the alveoli from blood capillaries
Describe the mechanism of action of thyroid hormones
A. These hormones interact with membrane signaling proteins. B. Thyroid hormones bind to molecules of the cytoskeleton in the cell cytoplasm. C. Thyroid hormones bind to epithelial cell membranes that line the intestine. D. These hormones bind to molecules of the cytoskeleton in the cell cytoplasm.