At the neuromuscular junction:

A. To terminate contraction, acetylcholine is broken down by acetylcholinesterase at the muscle cell membrane. B. Opening of muscarinic acetylcholine receptors increases the sodium permeability of the skeletal muscle membrane. C. Action potential propagation to the lower motor neuron triggers the opening of voltage gated Ca2+ channels allowing Ca2+ to flow into the cell and bind to muscle proteins triggering contraction. D. Action potential propagation to the lower motor neuron terminal opens voltage-gated Ca2+ channels triggering exocytosis of vesicles containing glutamate. E. Acetylcholine binding to acetylcholinesterase results in muscle contraction.

so, E. is the incorrect one.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation: