15. which involuntary muscle is found only in the heart?

smooth muscle

skeletal muscle

cardiac muscle

atrophied muscle

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.

no. i had a handful this morning