Phagocytes gather in the air sacs of the lungs, especially in the lungs of smokers. what is the connection

Phagocytic cells engulf debris, an smokers lungs will be laden with carbon particles and other debris from smoke inhalation. I hope this helps

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle

Ibelieve the answer is c) our brain jumps to conclusions based on past experience