Neuronal Cell-to-Cell Communication: Synaptic Transmission

Practice: Lambert-Eaton Syndrome is a disease at the NMJ caused by immune system attack on voltage-gated Ca2+ channels in the presynaptic membrane. Which of the following is likely true of NMJs affected by Lambert-Eaton Syndrome? (Choose all that apply.)

Practice: Myasthenia Gravis is a disease at the NMJ caused by immune system attack on nicotinic acetylcholine receptors. Which of the following is likely true of NMJs affected by Myasthenia Gravis? (Choose all that apply.)

Practice: Physostigmine is a drug that inhibits acetylcholinesterase. Which of the following is likely true of NMJs treated with physostigmine? (Choose all that apply.)

Practice: Nicotinic acetylchoine receptors, when bound to Ach, open to allow Na+ and K+ to cross the membrane of skeletal muscle fibers. Which of the following accurately describes nAchRs?