Water absorption from the proximal tubule is mainly driven by the active reabsorption of Na+
Indicate whether the statement is true or false.
TRUE
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Most people's core temperature normally varies during the day, with the lowest level occurring early in the morning before rising and the highest point occurring in late afternoon
Indicate whether the statement is true or false
Electrolytes are best defined as _____
a. chemicals that form ions in solution and conduct electricity b. chemicals that generate electricity c. compounds that form molecules without electrons d. salts that exchange covalent electrons e. salts that increase pH levels
Which of the following statements about membrane potentials in different types of cardiac cells is TRUE?
A. Voltage-gated transient (T-type) Ca2+ channels are present in all of the different types of cells of the heart. B. Myocardial cells have a resting membrane potential of about -90 mV; pacemaker cells do not have a true resting membrane potential. C. There are no L-type Ca2+ channels in cardiac muscle cells. D. The upstroke of the action potential is steeper in SA node cells than it is in Purkinje cells. E. Once threshold depolarization is reached in both myocardial and pacemaker cells, the rapid upswing of the action potential is caused by the opening of voltage-gated Na+ channels
Tactile discs are to ________ as tactile corpuscles are to ________
A) Wilms; Meissner B) Merkel; Meissner C) Meissner; Merkel D) Pacinian; Merkel E) pain; pressure