micro biology question about smooth muscles and skeletal muscle

1.increase in camo/pka always result in muscle contractions? 2.in smooth muscle contraction calcium binds to troponin? 3.stimulation of adregernic beta receptors on smooth muscles cause muscle relaxation and vasoconstriction? 4.what is true of calcium in skeletal muscle contraction? select all that apply a.binds to calmodulin b.binds to phosphoslipase c? c.comes solely from outside the cell? d.cimes from the endoplasmic recticulum ? 5.what is true about cardiac muscle contractions? select all that apply a.when calcium bind to calmodulin b.trigger by hormonal signals c.shortening of sacomeres d.triggered by action potential My answers: 1.false 2.true 3.false 4.d 5.a, b, d please tell me what you think this are not all correct i do not know which are and which are not

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