Reed, Riley, Ean and Michael want to run a race against each other. They start on the 20 yard line of the football field and finish at the 50 yard line. The times for them to complete the race are listed in the table. Reed 4 seconds
Riley 5 seconds
Ean 6 seconds
Michael 10 seconds
Which of the boys ran the race at an average speed of 5 yards per second?

Group of answer choices

Ean

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).