How does nicotine affect the respiratory system? it increases some reflex actions. it increases muscle action in the airways. it decreases mucus production. it causes breathing to become shallow?

The right answer is it causes breathing to become shallow.

Nicotine is classified as one of the most dangerous neurotoxins. Consumed however in small quantity, phenomena of tolerance and dependency are put in place.

Nicotine accelerates the respiratory rate and decreases the respiratory depth by hindering the transport of oxygen.