Can you me out with these questions, . 1. The voltage range across the membrane caused by an action potential is A. -50mV and +80mV B. -70 mV and +100

Can you me out with these questions, . 1. The voltage range across the membrane caused by an action potential is A. -50mV and +80mV B. -70 mV and +100 mV C. -70 mV and -50 mV D. -70 mV and +30 mV 2. The diaphram is controlled by the phrenic nerve which extends from the thorasic plexus a. Yes b. No 3. A common neurotransmitter widespred in the CNS and PNS which is the best kown and most studied is A. Acetylcholine (ACh) B. GABA C. Serotonin D. Norepinephrine (NE)