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- 39 of 41 Which of the following statements best describes autocrine signalling? O A cell communication mechanism in which the signalling molecules bind to receptors located on the cell secreting the signalling molecules. A cell communication mechanism in which the signalling molecules bind to receptors located on adjacent cells. O A cell communication mechanism in which the signalling molecules are released into the circulatory system to bind to receptors located on cells in tissues some distance away. A cell communication mechanism in which the signalling molecules are peptide hormones. A cell communication mechanism in which the signalling molecules are steroid hormones.An anti-enzyme drug Gordox is extracted from the pancreas of cattle and is used in the treatment of pancreatitis. Suggest the possible mechanism of action of Gordox. Pancreatitis develops as a result of premature activation of pancreatic peptidases. This may lead to the transport of trypsin into the blood due to pancreatic cells destruction. Gordox is an inhibitor of trypsin, so it inhibits the action of the enzyme on plasma proteins. Pancreatitis develops as a result of disrupted zymogen activation. Gordox is an inhibitor of trypsinogen, so it inhibits the action of zymogen on the pancreas. Pancreatitis develops as a result of a disorder in lipid digestion. Gordox is an inhibitor of cholecystokinin, so it inhibits the action on the pancreas. Pancreatitis develops as a result of premature activation of pancreatic peptidases. Gordox is an inhibitor of trypsin, so it does not allow trypsin to move into blood. Pancreatitis develops as a result of trypsin exit into the blood. Gordox is an…Regulation in biological systems depends on feedback .which is an exmple of in formation flow. when diabbetes destroy insulin-producing cells, what infortamtion flow in disrupted? The body is unable to send signals that indicate the amount of sugar in the blood. Cells in the bladder are no longer able to send signals when the blodder fills. Appetite signals no longer regulate feeding . The pancres is unable to produce enzymes to break down protein.
- Explain how the three hormones involved in insect growth— ecdysone, juvenile hormone, and PTTH—interact in molting and metamorphosis.Which of the following statements describes a likely effect of a drug that enhances testosterone (a steroid) binding to its receptor in human cells? The cytosolic levels of CAMP would decrease. The production of particular proteins would begin The cytosolic calcium concentration would increase. The activity of G proteins would decrease.Which of the following is true about vitamin D3 (cholecalciferol)? A. It is a sterol. B. It is a hormone precursor. C. Humans enzymatically synthesize their own Vitamin D3. D. It is converted into a biologically active form by UV light from sunlight.
- Match the following as either plant hormones or animal hormones animal Specific effects O Mainly local targets (nearby cells and tissues) "Decentralized" regulation Peptides/proteins and/or small molecules plant DOO ооооHydrocortisone is an over-the-counter ointment commonly used to treat eczema. Eczema is a skin condition where a patch of skin becomes irritated and inflamed. It is estimated that approximately 15% of Canadians are affected by eczema at some point in their lives. The active ingredient in hydrocortisone cream is the hormone cortisol. Which of the following statements describes why hydrocortisone is an effective treatment for eczema? Select one: a. Hydrocortisone helps to fight off the skin infection by increasing the immune response. b. Hydrocortisone helps to suppress the skin inflammation by decreasing the immune response. c. Hydrocortisone helps to suppress the skin inflammation by increasing the immune response. d. Hydrocortisone helps to fight off the skin infection by decreasing the immune response.Place the following steps (showing how a steroid hormone changes the activities of its target cells) in order of what happens first, second, third, fourth, and last. Refer to image. The hormone-receptor complex enters the nucleus of the cell and binds to the DNA. The steroid hormone passes through the cell membrane. The hormone attaches to a receptor in the cytoplasm, forming a hormone-receptor complex. A gene in the DNA is activated, and transcription and translation take place. Proteins that alter the cell′s activities, such as enzymes, are made. 2. Place the following steps (showing how a hydrophilic hormone changes the activities of its target cells) in order of what happens first, second, third, and last. Refer to image. The activity of the target cell is changed by the final enzyme in the cascade. The second messenger activates or deactivates certain enzymes in a cascade fashion. A second messenger is activated. Hormone binds to a receptor protein.
- Make an analogy that shows the important parts (including accessory organs) and processes of the digestive system and a student starting college life. Include the specific hormones and enzymes and explain how a particular hormone or perhaps an enzyme, will affect the student's experiences.In addition to carrying information between the brain and the peripheral nervous system, the spinal cord also functions 11 to coordinate fine movements in skeletal muscles to carry impulses which control heart and breathing rates as the control center for some reflex actions as the control center for production of digestive secretions Hormones move through the circulatory system and come in contact with all tissues in the body. Whether a group of cells is targeted by a particular hormone depends upon ↑ #3 O O @ 2@ 3 £ the location of the cells in relation to the gland that produces the hormone the presence of appropriate receptor proteins on the cell membranes whether the cells are actively dividing and growing whether the cells are also being stimulated by the nervous system с 54 $ 4¢ O M % 5 ¤ A 31 acer Oll 6¬ ? & 71 O * 2 9 xWhich of the following statementsabout hormones and nerve impulses isaccurate?O A. Hormones and nerve impulses bothcarry messages throughout the body, buthormones work more slowly.O B. Hormones and nerve impulses bothcarry messages in the body, but hormonesonly work on cells very near where thehormones are made.O C. Hormones and nerve impulses bothcarry messages in the body using electricalsignals.O D. Hormones and nerve impulses bothcarry messages throughout the body, buthormones work more quickly
