Accept/Reject: The toxin is enhancing activation of the sympathetic nervous system by blocking muscarinic receptors at effectors. 2. Accept/Reject: Given these observations, you anticipate upon further testing at higher concentrations, the mice will also exhibit arm, leg and neck muscle weakness. 3. Accept/Reject: The toxin might be inhibiting the release of norepinephrine from adrenergic fibers. 4. Accept/Reject: Nicotinic receptors in found at all sympathetic effectors must be blocked, resulting in the symptoms experienced by the mice. 5. Accept/Reject: The toxin might cause degeneration of oligodendrocytes, resulting in less myelin around axons in the peripheral nervous system and consequently slower transmission of neural impulses.