What is the difference between osmosis and diffusion? a. diffusion is the movement of molecules from an area of low concentration to an area of low concentration. osmosis is the opposite. b. osmosis the movement of molecules from an area of low concentration to an area of low concentration. diffusion is the opposite. c. osmosis is the movement of water across the membrane; diffusion is the movement of molecules from a higher to a lower concentration. with or without the presence of a membrane. d. diffusion is the movement of water across the membrane; osmosis is the movement of molecules from a higher to a lower concentration. with or without the presence of a membrane. answer asap!

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).