Biology · Human Anatomy
By which pathway does nicotine inhaled from cigarette smoke reach the brain to produce its neurophysiological effects?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1By absorption into the pulmonary bloodstream, traveling via systemic circulation to cross the blood-brain barrier✓
- 2Via peripheral nerves connected directly from the tongue to the pleasure centers
- 3Through local metabolic conversion entirely inside the respiratory tissue
- 4By completely dissolving in the saliva within the oral cavity
Correct answer
By absorption into the pulmonary bloodstream, traveling via systemic circulation to cross the blood-brain barrier
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