1)AV block refers to a condition where there is a longer-thannormal conduction delay at the AV node. There are different degreesof AV block. Sometimes conduction is only slightly delayed, andsometimes conduction is blocked entirely. Which of the followingwill not be observed in someone with AV block (ofany severity).
incorrect answer i selected)Atrial andventricular systole occur at the same time.
correct answer )Atrial contraction rate isslower than ventricular contraction rate.
2)Which of the following statements about the NeuromuscularJunction (NMJ) is CORRECT:
incorrect answer i selected)Blocking theactions of acetylcholine esterase (AChE) will prevent the openingof ACh receptor channels and reduce intracellular [Na+] in musclecells.
correct answer ) In healthy muscle, an actionpotential in a motor neuron will always be followed by actionpotentials in the muscle fibers that are innervated by that motorneuron.
Can you please explain to me why the answer iselected is incorrect and why the correct answer is right for theboth questions. Please explain.
