Without the mountain lions, increased numbers of deer may reduce the food supply available to other herbivores, such as field mice and crickets. as a result, populations of deer, mice, and crickets might decline, causing a population decrease in species that feed on these organisms as well. this example implies that properly functioning predator/prey relationships do which of the following?
select all that apply.

a: harm all of the organisms in an ecosystem b: throw an ecosystem out of balance
c: result in food surplus for the entire ecosystem d: maintain balance within an
ecosystem

Choose the incorrect statement (a) the motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials. (b) propagation of an action potential through the t-tubules into the sarcoplasmic reticulum triggers the release of ca++ into the cytoplasm of a skeletal muscle fiber. (c) the generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron. (d) a greater amount of ach would be found in the presynaptic vesicles of a motor unit that fired several action potentials after exposure to botulinum toxin, than in a motor unit that fired several action potentials after exposure to the venom of the krait snake (which contains α-bungarotoxin).