If stranded on a deserted island with no freshwater, it is not advisable to drink sea water. why not?
a)
the salty snacks cause an ionic imbalance that triggers a nervous response.
b)
the salt in the body creates a hypertonic solution around cells, which causes water to diffuse out of cells and make them crenate.
c)
the salt in the body creates a hypotonic solution around cells, which causes water to diffuse into cells and make them cytolyse.
d)
the salt in the body creates an isotonic solution around cells, which causes water to diffuse into and out of cells which makes them unstable.

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).