Breathing is Accomplished Via the Rhythmic Contraction and Relaxation Of

Question

Breathing is accomplished via the rhythmic contraction and relaxation of
A)smooth muscle.
B)skeletal muscle.
C)cardiac muscle.
D)smooth muscle and cardiac muscle.
E)smooth muscle and skeletal muscle.

Accepted Answer

Breathing is accomplished through the use of skeletal muscle. Specifically, the contraction and relaxation of the diaphragm and intercostal muscles in the chest and abdomen help to expand and contract the lungs, allowing for air to be exchanged. Smooth muscle and cardiac muscle are not directly involved in the process of breathing.