Which of the following describes a positive feedback loop? o When blood sugar concentration is too low, the endocrine system secretes hormones that increase blood sugar
concentration to a normal level.
o When the body senses that the heart rate is very high, it secretes hormones that decrease the heart rate.
o When blood sugar concentration is too high, the endocrine system secretes hormones that decrease blood sugar
concentration to a normal level.
o When someone is exercising intensely, the body secretes hormones that increase oxygen supply for cellular
respiration

Ithink the answer is c. i’m not sure though i’ll notify you when i have an exact answer!

This is s cute awee : (( . well if she's showing you signs that she may like you , then shoot your shot ! don't be afraid . & if you're unsure that she's giving you these signs , then wait out for a little bit . most girls are different . some may act really sweet , but only bc you're a good friend of hers . that , or she might like you . you just never know . but i think you should sit down with her & tell her how you feel . but don't be awkward & shy . just be straight up & tell her how you feel . if the feelings aren't mutual , then don't cry about it . you need to respect her decision & look for others in the world . feelings can be difficult & confusing , but don't be afraid to show them . i say you play it out & if you're still unsure about it , talk to her . - rach