nicotine binds to acetylcholine receptors at the synaptic cleft. which is a likely effect of nicotine?

Charlie is easily winded during soccer practice and wants to improve his cardiorespiratory fitness. which activity would be best for him to choose? lifting weights walking from one class to another running in a 5k race riding a bike at a leisurely pace

Why is people bullying? what's the target?

How does social isolation affect teens?