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.

What advantage does a crop that undergoes vegetative reproduction have over plants that start from the seed? 1points a they store nutrients. b they can travel farther. c they experience more genetic variation. d they only occur in high-resource environments.

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).

How to farmers could ensure that they only grow white flowers