The body regulates blood pressure in a process in which nerves sense the blood flow resistance associated with higher blood pressure; the nerves relay this message to the brain;
the brain then slows down the heart rate and dilates the blood vessels, lowering the blood
pressure. This process is an example of -
positive feedback
heart disease
negative feedback
O action potential

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls

Which of the following would most directly interfere with sperm production? ingestion of a substance that mimicked inhibin interruption of sustentocytes' production of abp low sperm count use of synthetic steroids (testosterone)