Your stomach growls, indicating hunger. You eat your lunch, and the process of digestion begins. Digestion is complex. What roles do you think the mouth and the stomach play in digestion? Write your thoughts on the lines below. After you have read this section, add any new information you learned.

Which identifies the main purpose of biological taxonomy?

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

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).