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Nr 283 final exam questions and answers

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NR 283 Final Exam Questions and Answers What regulates the release of hormones? - answerfeedback systems Positive Feedback - answertells a hormone to make more Negative Feedback - answerstops making a hormone Secreting Cells - answerwhat is pumped out of the cells (ADH released from the posterior pituitary gland) Receiving Cells - answerwhat cells the hormones target (ADH targets the kidney) Why are hormones are released? - answer-altered cell environment (increases intake of glucose leads to a release of insulin) -maintaining levels of other hormones (cascades trigger the release of other hormones, ex: TRH) -neural control (autonomic NS - not in control) Non-steroidal hormones - answer-water soluble, can float around blood stream with no issues since the blood stream is made up of water, but cannot get through phospholipid bilayer - which is why we need receptors on the cells and second messengers (proteins that live inside the cells to help get the message to the nucleus) -ex: insulin: freely moves around bloodstream but has to connect with a second messenger Steroidal Hormones - answer-lipid soluble, fatty hormones floating around bloodstream cannot float around easily so they need carrier proteins to carry them. When they get to the cell, they dont have any issues getting into the cell they can deliver the message straight to the nucleus ex: sex hormones (estrogen, testosterone) regulation - answerrefers to the receptivity of cells, how open is that cell to allo ...
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