Primary active transport moves which of the following ions across the membrane?
a. sodium
b. potassium
c. hydrogen
d. calcium
e. all of these answers.
E
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The resting membrane potential of a cell is –85 mV. The intracellular and extracellular concentrations of several ions are indicated below, as is the calculated Nernst equilibrium potentials (E) for these ions
The membrane has channels for Na+, K+, Cl- and Ca++. The conductance of the membrane is the greatest for which ion? A. Na+ B. K+ C. Cl- D. Ca++
The number of covalent bonds that can be formed by a given atom depends upon the number of electrons present in the outermost orbit
Indicate whether the statement is true or false.
What is the range of action potentials per minute for the cells in the AV node?
a. 20 - 40 b. 40 - 60 c. 70 - 80 d. 80 - 100 e. 100 - 120
Which of the following is not a function of the digestive system?
A) mechanical processing B) absorption C) compaction D) ingestion E) filtration