Question

Contraction in all muscles depends on an increase in the intracellular concentration of Ca2+ ions. Millions of Americans, however, regularly take prescription medications that act as calcium channel antagonists at all cell membranes, reducing the influx of Ca2+ from the outside of cells to the inside (but not entering the cytoplasm).

Mark all statements that are true:

a. these drugs would affect spatial summation in muscle.

b. these drugs would have almost no effect on the force of cardiac muscle contraction

c. these drugs have almost no effect on the force of contraction in skeletal muscle

d. these drugs would slow the process of digestion

e. these drugs would reduce the force of cardiac muscle contraction

Answer 1

Answer ; C) these drugs have almost no effect on the force of contraction in the skeletal muscle.
E) these drugs would reduce the force of cardiac muscle contraction.

Reason ; The major influence of taking these drug would be highly manifested in the cardiac muscles in order to deal with the blood pressure. It doesn't have any effect on skeletal part, because these muscles cell would not use these molecule from the extracellular fluid rather they can perform their activity by utilizing the calcium within the cells. Although these drugs affect the motility of the stomach wall, the digestion process would not get slow down. therfore the above mentioned statement are true about these mentioned drug.