Answer:
B) Valves closing
Explanation:
A healthy heart makes a lub-dub sound with each beat. This sound comes from the valves shutting on the blood inside the heart. The first sound (the lub) happens when the mitral and tricuspid valves close.
Answer:
For moderate-intensity physical activity, your target heart rate should be between 64% and 76%1,2 of your maximum heart rate. You can estimate your maximum heart rate based on your age. To estimate your maximum age-related heart rate, subtract your age from 220. For example, for a 50-year-old person, the estimated maximum age-related heart rate would be calculated as 220 – 50 years = 170 beats per minute (bpm). The 64% and 76% levels would be:
64% level: 170 x 0.64 = 109 bpm, and
76% level: 170 x 0.76 = 129 bpm
Explanation:
Answer:
An Oncologist is a doctor who treats cancer and provides medical care for a person diagnosed with cancer.
Explanation:
hope that helps :)
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the answer is all of the above i took the test
