Digestive motility is accomplished by smooth muscle contractions. is accomplished by smooth and voluntary muscle contractions. may be propulsive in nature. both (a) and (b) above. both (a)
1) is accomplished by smooth muscle contractions.
2) is accomplished by smooth and voluntary muscle contractions.
3) may be propulsive in nature.
4) both (a) and (b) above.
5) both (a)