Endocrine systemName: 1. Date: The diagram below represents the region between two nerve cells. Cell A releases a chemical that travels to and binds with structure X on cell B. 3. Base your answer to the following question on the information below and on your knowledge of biology. Botulinum toxin is a protein produced by the bacterium Clostridium botulinum. It causes a serious form of food poisoning in humans. In a very dilute form, it is also commonly used to eliminate some signs of aging, such as wrinkles. It does this by preventing nerves from releasing a chemical messenger called acetylcholine into the synapse (space between a nerve cell and a muscle cell). The toxin a ects the process that causes the muscle cell to contract and form wrinkles. The diagram below represents a process that is involved in the formation of wrinkles. Complete the diagram by drawing an appropriate structure on the muscle cell membrane that would allow the nerve cell to communicate with the muscle cell. Structure X most likely represents A. a receptor molecule B. an inorganic substance C. a ribosome D. an antibody 2. How do cells in the ovary detect a hormone from the brain? A. The brain sends a nerve impulse to the ovary. B. White blood cells bring the hormone to the ovary. C. Receptor molecules on the cells of the ovary bind with the hormone. D. Vacuoles within the ovary bind with the hormone. page 1 If these chemical messages are destroyed. Which graph best illustrates normal blood glucose levels in a healthy adult over the course of a day? A. Which statement correctly describes an interaction between the hormones and the cells? A. 5. B. develop di erent receptors D. D. Hormone A is synthesized by cell 2 and targets cell 1. Speci c reactions carried out by cell 1 are regulated by hormone C. The specialized receptor molecules on cell 1 secrete hormone B. produce their own chemical messages B. C.4. not respond with appropriate actions C. no longer be produced in the organism page 2 Endocrine system . The diagram below represents cells and hormones present in the human body. B. The diagram below shows how a chemical message produced by one cell is received by other cells. Hormone B bonds with both cell 1 and cell 2. 6. C. The blood glucose range for a healthy adult is 65–104 mg/dL. D. the target cells will A. an immune response A. D. coordinate enzyme production 10. The action of insulin on sugar levels in the blood helps to A. homeostatic feedback C. an energy cycle B. The interaction of substances A and B is an example of A. Base your answer(s) to the following question(s) on the diagram below and on your knowledge of biology. B. regulate fat concentration by a feedback mechanism B. a learned behavior 11. The rst successful transplant of insulin-producing cells from a living donor pancreas was completed in April 2000 in Japan. in maintaining the level of glucose in the blood in humans. These events can best be described as an example of A. recycling of inorganic materials C. The diagram below represents a sequence of events that occurs in the human D. regulate digestion of protein 8. a genetic mutation B. body throughout the day. slow down the heart rate after a period of activity ends D. Both substances A and B are classi ed as biological catalysts. Substance B is a chemical receptor molecule produced by blood cells. The diagram represents the e ect of two chemical substances. maintain blood sugar levels throughout the day D. C. active transport 9. page 3 Endocrine system . interfere with homeostasis B. Substance A is insulin. maintain dynamic equilibrium C. A and B. a feedback mechanism D. provide protection against an infectious disease C. Substance A is a chemical that is produced by specialized blood cells.7. which is released by cells in the pancreas. This enabled the body of the recipient to Which statement is correct regarding the substances involved in these interactions? A.