Which of the following is true of cells in batch culture? cells never reach exponential growth rates. metabolic wastes do not accumulate. cells will not remain at a constant mass. new batches of media are added during culturing.

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).

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.

Which statements best describe the atoms of the gas neon? check all that apply