Which of the following correctly describes the order of events occurring during a sympathetic nervous system response?
stimulation of cranial or sacral spinal regions; impulse reaches cranial root ganglion; acetylcholine release
stimulation of cranial or sacral spinal regions; impulse reaches cranial root ganglion; norepinephrine release
stimulation of thoracic or lumbar spinal regions; impulse reaches chain ganglion; acetylcholine release
stimulation of thoracic or lumbar spinal regions; impulse reaches chain ganglion; norepinephrine release

Ineed a chemical reaction takes place in which erlergy is released. arrange the reaction's characteristics in order from start to finis lower energy of reactants higher energy of products higher energy of reactants transition state sd lower energy of products

Compare the composition of the moon's surface with the composition of the earth's surface.

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).