Hydrogen bonds form A. to hold one molecule of water together, bonding one hydrogen atom and two oxygen atoms
B. To hold one molecule of water together bonding one oxygen atom and two hydrogen atoms
C. between the positivity charged oxygen of one water molecule and the negatively charged hydrogen of another water molecule
D between the negatively charged oxygen of one water molecule and a positively charged hydrogen of another water molecule

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).