Answer:
Target heart rate is generally expressed as a percentage (usually between 50 percent and 85 percent) of your maximum safe heart rate. The maximum rate is based on your age, as subtracted from 220. So for a 50-year-old, maximum heart rate is 220 minus 50, or 170 beats per minute.
Explanation:
Answer:
d) episodes of pelvic inflammatory disease
Explanation:
Ectopic pregnancy occurs when the fallopian tubes get narrow which stops the ovum to be passed in the uterus for implantation. This can cause life-threatening conditions due to bleeding.
The major and most common cause of ectopic pregnancy is pelvic inflammatory disease which can be caused by bacteria like gonorrhea, chlamydia. These bacteria usually come during unprotected sex. They do inflammation in the fallopian tube and narrow it which can result in ectopic pregnancy. So the right answer is d.
You listen until you hear S1 and S2, S2 heart sounds clearly and regularly. S2 is produced when the semilunar valves close.
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