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Quiz Attempt 2: Natural Resources and Energy
Due 05/08/20 11:59pm
in science class. Ethan and his friends are creating posters. The posters will show where various fuels are
found and how they are formed.
Coal
What can be added to the drawing to show the original source of the energy found in the fuel?
A rocks breaking down into minerals
B. people mining the coal
O
C
the motion of flowing water
O
D
sunlight shining on Earth

Discuss cell surface transport in the structure of constituents

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).

What happens when a scientific theory is shown to be an accurate description of a phenomenon?