When the hormone insulin is released into the bloodstream, what form of cell-to-cell signaling is being used?

a. endocrine

b. paracrine

c. neuronal

d. contact-dependent?

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!