Question

causes the sarcoplasmic retieatum of skeletal musele cells to release calcium onto the sarcomere: what he movement of tropomyosin off of the binding site of actin the binding of acetyleholine with its receptor the binding of caleium with troponin he movement of the action potential down the T-tubal the binding of ATP to the Ca-ATPase on the sarcoplasmic reticulum "Rigor Mortis" is caused b a. the inability of the myosin head to detach from actin b. a lack of calcium in the sarcomere the inability of the myosin head to bind with their binding sites on actin d. the inability of the myosin head to reset to its "ready" position e. listening to a Trump speech Which statement about the synapse is true: the action of b. the inward movement of sodium ions at the terminal stimulate the exocytosis of the synaptic vesicles e. the re-uptake process results in an increase in the level of transmitter substance in the synaptie eleft d. the elosing of a potassium channel is an example of an excitatory chemically-gated channel e. the opening of sodium channels is an example of inhibitory chemically-gated channels acetyleholine-esterase at the cleft results in an inerease in the amount of transmitter substance 53. All of the following about the potassium ion are true exeept outward diffusing potassium is responsible for most of the resting membrane potential b. outward diffusing potassium is responsible for the repolarization-phase of the action potential e. channels that bind transmitter substance to then open a potassium channel are hyperpolarizing d. acetylcholine causes a decrease in potassium permeability in dal cells no e. chemically-gated channels that close potassium channels are depolarizing 54. If your patient in the emergency room had chocking, vomiting, urination, and defication, you would thinks a. she had been poisoned with atropine b. that you could stop most of these symptoms with physostigmine e that her cholinergie nicotinic reeptors had been blocked d. that she had a full-blown case of tetanus! e. that her cholinergic muscarinic receptors were being super-activated 55. In skeletal muscle, if calcium is not present, which action cannot happen: a. the myosin head can cleave ATP into ADP +P b. the myosin head can reset to its "ready" position c. the myosin head can bind with ATP d. the myosin head can bind with the binding site on actin e. the myosin head can detach from actin

Answer 1