An olfactory receptor neuron (ORN), also called an olfactory sensory neuron (OSN), is a transduction cell within the olfactory system.
The average heart rate for a teenager is around 80-110 beats a minute. <br /><br /><br /><br /> I hope I helped. Well it didn't because you are wrong. If you are a couch potato and never work out maybe 80-110 or if you just got done running. The average heart beat per minute is 60-80 beats per minute. <br /><br /><br /><br /> Well lets see I just got started learning about this in health and my health teacher said that the average heart rate for a teenager when at rest is about 72 beats per minute.
A fast heart rate is called tachycardia. The definition of too fast usually depends on the person's age and physical activity. A newborn has tachycardia if the resting rate is more than 160 beats per minute. A teenager is considered to have tachycardia if the resting heart rate is more than 90 beats per minute. A teenager may have a normal heart rate of up to 200 beats per minute during exercise.