3. Nicole has glasses on the counter one of water and one of sugar water. She is
baking a cake and needs to use the sugar water for the glaze. Both glasses look
identical, but one contains a mixture and the other contains a compound. Is sugar
water a mixture or a compound? Define mixtures and compounds, and explain how,
without tasting it, Nicole can teal to make sure she is using the sugar water in the
glaze

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).