When doing the amylase activity, you will be examining the effect of which of the following variables on enzyme activity?
A) Concentration
B) pH
C) Osmolality
D) Temperature
Answer: D
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In the diagram, which bone is considered the keystone of the cranial floor?
a) E b) B c) G d) H e) I
The "iodide pump" actively transports hormone-bound iodine from the thyroid gland into the circulation
Indicate whether the statement is true or false
Besides visual input, what other sensations contribute to the sense of equilibrium?
A) strong leg muscles B) mental activities, such as counting backwards C) proprioceptors detecting information about neck muscles D) sound detected in the cochlea
When a small amount of HCl or NaOH is added to a solution of Na2HPO4, the pH of the solution barely changes. Based on these observations, all of the following are true concerning the compound Na2HPO4 except
A) Na2HPO4 is able to accept extra hydrogen ions from the HCl. B) Na2HPO4 is able to donate hydrogen ions to the OH- from NaOH. C) Na2HPO4 adsorbs excess H+ and OH- directly onto the surface of its crystalline structure. D) Na2HPO4 is a salt formed from reacting a strong base with a weak acid. E) Na2HPO4 acts as a buffer.