When a woman goes into labor during childbirth, the cervix expands which sends a signal to the pituitary gland to release oxytocin which results in more contractions which results in more oxytocin being released and so on. what is happening during childbirth?
a) a negative feedback loop.
b) cell regulation
c) a positive feedback loop.
d)a neutral feedback loop

What are the types of mutations, and how does each alter the encoded protein? college level answer

(drag each tile to the correct identify which questions can be answered by what can be answered by science or which cannot. -is it right or wrong to use genetic engineering to produce new food products? -what are the most common social settings that tend to produce accomplished artists? -if a new gene is added to the genome of a tomato species, will that species be more resistant to insects? -should humans use biotechnology to bring extinct organisms from the fossil record back to life? -do the types of organisms found in the fossil record appear in consistent sequences in different parts of the world? -are michelangelo's paintings more impressive than rembrandt's?

Which structure in the cardiovascular system connect arteries to veins?