Question

8. During ventricular systole, the semilunar valves open before the atrioventricular valves a. True b. False 9. Sequence. Place the following events in excitation-contraction coupling in the correct sequence. Action potential produced in muscle cell Action potentials open voltage-gated Ca* channels Na diffuses into muscle cell, producing depolarizing stimulus Ca* release channels in sarcoplasmic reticulum (SR) open Ca²+ diffuses out into sarcoplasm ACh binds to nicotinic ACh receptor, opening ligand gated channels Action potentials conducted along transverse tubules 3 Ca2+ binds to troponin, stimulating contraction ----------- ------------------ ---------- laorta pulmonary value or vena cava lef pulmona I left a al node ulmonary Vlins ntricular Yatrioventricula bund!

Answer 1

For ur easy reference order is as follows. .

3-6-1-7-2-4-8-5