Plasma is a) a liquid ground substance containing dissolved proteins. b) a dissolved ground matrix and a lining of epithelial cells. c) a liquefied ground substance that includes several dissolved cells. d) platelets, red blood cells, and white blood cells. e) platelets and a watery ground substance.
A normal resting heart rate can range anywhere from 40 to 100 beats per minute. Below is a chart relating resting heart rate and fitness level. As can be seen on this chart, your resting heart rate can vary with your fitness level and with age â the fitter you are, generally the lower the resting heart rate.
Resting Heart Rate. The experts at the Mayo Clinic suggest the normal resting heart rate for an adult is between 60 and 100 beats per minute. If you are a healthy adult, the lower your resting heart rate is the better. If you are a trained athlete, your resting heart rate may be 40 beats per minute. However, this is normal because your heart is able to pump blood through your body more efficiently. To make an accurate determination of your heart rate, take your pulse when you are sitting down at rest, not moving or walking.