Which sentence most needs to be revised because its description is too vague? we hiked two miles uphill in the blooming forest today. we sprinted back and forth in the stuffy high school gym. we had to walk up several flights of stairs to get there. we stretched and then slowly jogged once around the track.

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

The transport tubes for food coming down the plants are called?

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).