The olfactory receptors in the nose detect

chemicals in the air

chemicals in water solution

changes in air and fluid pressure

Hello user•tape measure•calipers•mri/ct scans •air displacement plethysmography •body fat scale•hydrostatic weight hope this : ))

Not sure exactly what kind of answer you are looking for so i hope this able to be a effective listener and also being  a good conversationalist. and most of all just being there when someone needs you.i hope this .

Lifting and pull ups

(a) is not correct because one does not get increased cholesterol  from lifting weights.(b) is not correct because lifting weights cannot reduce the risk of a hereditary disease.(c) is not correct because back pain isn't a benefit! and plus, if he lifts weights properly, he should not have back pain.(d) is the correct answer because his ligaments will gain mass, making it easier for him to carry heavier weights and he will also be stronger!