Question

How do calcium ions stimulate contraction in nonmuscle cells and smooth muscle cells? Choose one: A. Calcium ions bind to troponin and lead to a conformational change in tropomyosin that exposes the myosin binding sites on the actin filament. B. Calcium ions released into the cell promote the release of secretory vesicles that send neurotransmitters to neighboring cells to stimulate an action potential. C. Calcium ions trigger an action potential in the cell, leading to gene expression changes that influence contraction. D. Calcium ions lead to activation of a kinase that phosphorylates nonmuscle myosin to alter its conformation and enable actin binding.

          How do calcium ions stimulate contraction in nonmuscle cells and smooth muscle cells?
Choose one:
A. Calcium ions bind to troponin and lead to a conformational change in tropomyosin that exposes the myosin binding sites on the actin filament.
B. Calcium ions released into the cell promote the release of secretory vesicles that send neurotransmitters to neighboring cells to stimulate an action potential.
C. Calcium ions trigger an action potential in the cell, leading to gene expression changes that influence contraction.
D. Calcium ions lead to activation of a kinase that phosphorylates nonmuscle myosin to alter its conformation and enable actin binding.

How do calcium ions stimulate contraction in nonmuscle cells and smooth muscle cells?
Choose one:
A. Calcium ions bind to troponin and lead to a conformational change in tropomyosin that exposes the myosin binding sites on the actin filament.
B. Calcium ions released into the cell promote the release of secretory vesicles that send neurotransmitters to neighboring cells to stimulate an action potential.
C. Calcium ions trigger an action potential in the cell, leading to gene expression changes that influence contraction.
D. Calcium ions lead to activation of a kinase that phosphorylates nonmuscle myosin to alter its conformation and enable actin binding.

Added by Alfonso R.

Question

Please give Ace some feedback