Which of the following describes a positive feedback loop?
when blood sugar is low, the body sends hormones that increase blood sugar.
when the body senses that the heart rate is very high, it secretes hormones that decrease the heart rate.
when a pregnant woman begins to go into labor, the body sends hormones that increase the intensity of the labor contractions.
when someone is exercising intensely, the body sends hormones that increase oxygen supply for cellular respiration.

9. which of these are considered standard precautions for dealing with bodily fluids? check all that apply wearing gloves when providing patient care that may involve contact with blood checking a patient's chart to determine if there is a harmful blood disorder wearing aprons, masks, and protective eyewear when needed transporting a patient from a bed to a wheelchair to take him or her to a procedure washing hands when required cleaning equipment thoroughly before using it on the next patient