Why is calcium necessary for muscle contraction Calcium is n

Why is calcium necessary for muscle contraction? Calcium is needed to detach the myosin from the actin. Calcium is needed to activate troponin so that tropomyosin can be moved to expose the myosin-binding sites on the actin filament. Calcium is needed to allow the muscle fiber to become depolarized. Calcium functions as a neurotransmitter and is released from the motor neuron. Calcium is needed to cock the myosin head so that it can form a cross-bridge with actin. The binding of neurotransmitter to receptors on a vertebrate muscle cell causes: an influx of sodium ions, causing a spike in depolarization. an influx of potassium ions. a graded depolarization of the muscle cell. an efflux of sodium ions. Muscle groups that produce similar motion, or work synergistically, at a joint are known as: agonists. synergists pro-agonists antagonists.

Solution

1) Calcium is necessary for muscle contraction because calcium need to activate troponin so that tropomyosin can be moved to expose the myosin binding sites of the actin filament.

2) I think the binding of neurotransmitters to receptors on a vertebrate muscle cells cause an influx of sodium ions causing a spike in depolarizatiion

3)Muscle groups that produce similar motion, or work synergistically at a joint are kown as synergistics