CHOICES SubmitMy AnswersGive Up A Tube A will shorten length

CHOICES:

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A. Tube A will shorten lengthwise during contraction. Tube B will decrease the inside diameter of the tube during contraction.

B. Tube A will decrease the inside diameter of the tube during contraction. Tube B will shorten lengthwise during contraction.

C. Both tubes A and B will shorten lengthwise AND decrease the inside diameter of the tube during contraction.

D. Nothing will happen to the shape of either A or B because a tube needs cells orientated both along the length of the tube and around the circumference of the tube to be able to contract.

Part A Below are partial descriptions of two smooth muscle layers that lie within tubes in the body. In tube A, the smooth muscle cells are orientated around the circumference of the tube. In tube B, the smooth muscle cells are orientated along the length of the tube. Deduce what will happen to the shape of each of the tubes during contraction of each muscle group. O Tube A will shorten lengthwise during contraction. Tube B will decrease the inside diameter of the tube during contraction. O Tube A will decrease the inside diameter of the tube during contraction. Tube B wil shorten lengthwise during contraction. O Both tubes A and B will shorten lengthwise AND decrease the inside diameter of the tube during contraction. O Nothing will happen to the shape of either A or B because a tube needs cells orientated both along the length of the tube and around the circumference of the tube to be able to contract. Submit My Answers Give Up

Solution

Nothing will happen to shape of either A or B needs cell orientation because changes in internal and external environment is mediated by muscle cells . Its basis is conversion of chemical energy(ATP) into mechanical energy by contactile apparatus of muscle cell.