In our anatomy class a while ago, we discussed about pulse rate and blood pressure. We tried getting pulse rates then my instructor was alarmed that I have a pulse rate of 105 beats per minute. Is there something to worry about? I also have a blood pressure of 120/90.

By the way I'm an 18-year old guy, I weigh 55 kgs. and I smoke for a year now. I don't feel anything unusual for now.