Below is a picture of amylase, an enzyme that catalyzes the breakdown of starches into sugar. Amylase is present in the saliva of humans and some other mammals,
where it begins the chemical process of digestion. The optimal pH of amylase is 6.0
and temperature of 98.6. Foods that contain large amounts of starch but little sugar,
such as rice and potatoes, may acquire a slightly sweet taste as they are chewed
because amylase degrades some of their starch into sugar.
B
--
In this reaction,
is used up.
is changed
remains unchanged.

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).