This is false because as the size of the respiratory decreases, smooth muscle increases. Smooth muscle is present from the main bronchi to the alveolar ducts.
Smooth muscles are muscles that work without us knowing it or wanting to (involuntary). Smooth muscles work on the orders of the muscles and the needs of the body. These muscles are spread throughout the body, starting from the respiratory tract, uterus, and bladder to the digestive tract.
Smooth muscle is responsible for regulating the diameter of the respiratory tract. Smooth muscles will contract when exhaling so that the air is pushed out of the respiratory tract.
Learn more about smooth muscles at https://brainly.com/question/13903265
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