Which of the following does not contribute to the cell's membrane potential?

a. Permeability to K+

b. Permeability to Na+

c. The overall resistance of the membrane

d. Electrogenic ion pumps

e. None of the above; all contribute to membrane potentials.

a 4 poung bag of sugar contains 454 one teaspoon servimgs and costs 3.49 a batch of muffins uses 3/4 xup of sugar. how many batches can you make if you use all the sugar? what is the cost of sugar for each batch

What is the function of most of the stem cells in adults?

Which joint has the least range of motion a. synovial b. sutures c. fibrous d. cartilaginous

Why is it important to define the limits of an ecosystem and what are some examples of those limits?

Which protein serves as a chemical messenger? hemoglobin actin myosin insulin

Look at the chemical reaction below Magnesium + hydrochloride acid - > magnesium chloride + hydrogen Mg + 2HCI - > MgCI2 + H2 In this reaction Magnesium (Mg) is a reactant or product Hydrogen (H2) is a reactant or product Magnesium chloride (MhCI2)

Where does the primary source of energy needed for life come from? 1) solar energy 2) geothermal energy 3) nuclear energy 4) kinetic energy

Which molecules is not part of the cell membrane? a. lipid b. nucleic acid c. phosphate group d. steriod e. protein?

During dna replication in a human cell, 6 billions bases must be paired properly. which characteristic of dna best allows for high level of accuracy during this process

Which of the following actual (i. e., real) products of biological activity is not likely to be a source of the increases in greenhouse gases observed in recent history? A.