HAPS ANATOMY II: CH. 18-28 EXAM REVIEW TEST A+

HAPS ANATOMY II: CH. 18-28 EXAM REVIEW TEST A+ Define hormone. - ANS-a chemical messenger that is secreted by one cell and travels through the bloodstream to affect the activities of cells in other parts of the body. Describe paracrine communication. - ANS-use of chemical messengers to transfer information from cell to cell within a single tissue. Identify four mechanisms of intercellular communication. - ANS-Direct, paracrine, endocrine, and synaptic. How could you distinguish between a neural response and an endocrine response on the basis of response time and duration? - ANS-Neural responses occur within fractions of a second and are of short duration. Endocrine responses are slow to appear but last for minutes to days. How would a substance that inhibits the enzyme adenylate cyclase affect the activity of a hormone that produces its cellular effects by way of the second messenger cAMP? - ANS-