Question

quick check: fill in the blank using word bank more, receptors, control center, increase
another example of a positive feedback loop in the body is birth. when it is time for a baby to be born,
___________, in the mothers body stimulate the hypothalamus in her brain. the hypothalamus acts as
a___________, signaling cells in her pituitary to release the hormone oxytocin. oxytocin acts on the
muscles in her uterus, causing contractions. oxytocin also acts on the placenta to cause the release of
prostaglandins, which stimulate more uterine contractions. this process causes the hypothalamus to signal the
pituitary gland to release____________________ oxytocin, causing muscle contractions and prostaglandin
production to____________________. labor ends when the baby has been born and the placenta has been
expelled.
exit ticket: the body relies on positive and negative feedback loops to maintain homeostasis. one such
feedback loop is used to maintain water balance in the body. what type of feedback loop returns the
body to homeostasis when it becomes dehydrated? use the evidence from this lesson to support your
answer.

Explanation:

Negative feedback loops work to reverse changes and restore the body to its normal state. When dehydrated, the body's water level drops. Receptors detect this change and send signals to the control center (e.g., the hypothalamus). The control center then initiates responses (like reducing urine output via antidiuretic hormone) to increase water levels and return to homeostasis. This is characteristic of a negative feedback loop as it counteracts the deviation (dehydration) from the normal state.

Answer:

Negative feedback loop.