Which best explains why muscle cells have more mitochondria than skin cells? A
Muscle cells divide more often than skin cells.
B
Muscle cells make more protein than skin cells.
C
Muscle cells require more energy than skin cells.
D
Muscle cells break down more waste than skin cells.

Which of the following is the most likely outcome of global warming

How water is moving through the ecosystem ?

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).