Please answer all questions.

1			How would you go about determining the normal value for potassium in human blood?
2			In childbirth, the force and rate of contractions increases as the child is being born. Is this an example of positive or negative feedback?
3			Do you think the muscles that cause your eyelid to blink are skeletal, cardiac, or smooth?
4			What kind of glands are the ceruminous (earwax) glands?