If the sodium-potassium pumps in the plasma membrane fail to function, all of the following occur except: a) the intracellular concentration of potassium ions will increase.
b) the neuron will slowly depolarize.
c) the membrane will slowly lose its capacity to generate action potentials.
d) the inside of the membrane will have a resting potential that is more positive than normal.
e) the intracellular concentration of sodium ions will increase.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.  

well, i believe that the answer is 2. : 3