2. What link of a contour of biological regulation provides possibility of regulation "on a deviation": A. The channel of external connection B. The feedback channel C. The channel of straight connection D. Such link is absent
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- 8. Draw a diagram that shows how the parts of a positive feedback loop interact. (Don't describe a particular example of negative feedback. Try to generalize.) Include set-point, stimulus, sensor, control center, effector, and response in your drawing. Show the direction of response as well. CC BY NC SA ©C.Seiwert, 2021You have to identify the following:1. The negative feedback condition/mechanism2. The four components of a negative feedbackloop:A. stimulusB. sensorC. control centerD. effector3. Explain what would happen to eachcomponent if a secretion became too great.DneostaSIS means maintaining a stable, approximately constant internal environment within an organism. O ose the external environment is constantly changing (temperature, chemicals, etc.), organisms must have a control system to detecting changes and responding to them.. Anything that must be maintained in the body within a normal range (the "set point") must have a control system. For example, body temperature, blood pressure, and blood glucose levels are all regulated. To cal Immmon ht 16. A homeostatic control mechanism consists of three parts. Fill in the blanks with the appropriate word for the analogy below. ast gool The variable or stimulus is the factor that is regulated (ex: room temperature / body temperature). A variable is like a teeter-totter. If it is perfectly balanced in the horizontal position, it is at the normal value called the ibeet (ex: 68° F/98.6° F). The (ex: thermometer / nerves in the skin) senses changes in the variable SC (temperature) and sends information…
- 1. Frog skin is an excellent system for studying sodium transport across an epithelium. Frog skins is stripped from the frog's leg and tied into a sack. The inside of the sack is the internal (extracellular fluid) surface of the frog skin. The sack is filled with normal frog saline and the filled sack is placed in a beaker filled with the same saline. The recording electrode of a voltmeter is placed inside the sack and the ground electrode is placed in the bath. a. (Draw a picture to help you visualize this arrangement.) b. When the electrodes are first placed, there is no transepithelial potential difference. c. After an hour, the transepithelial potential is +20, inside the sack relative to outside.(30. While conducting research on Euglena, a researcher observed that the contractile vacuole ceased functioning yet the rest of the organism seemed healthy and active. Which of the following is MOST likely responsible for the cessation of contractile vacuole action? A. Moving the Euglena from a lighted to darkened environment. B. Moving the Euglena from a freshwater to a seawater environment. C. Moving the Euglena 1om a seawater to a freshwater environment. D. Lowering the pH of the medium from 7.0 to 6.5. E. Lowering the temperature of the medium from 20°C to 15°C.I cannot seem to understand this: In the set-up shown in the figure below, which of the following statements describe what would be observed after 12 hours of time have elapsed? The level of the solution in the tube would rise The level of the solution in the beaker would rise The level of the solution would not change as the membrane prohibits any exchange between tube and the beaker. The level of the solution in the tube would lower
- 32. The uptake of a large amount of fluid into the tubule cells of the kidney is an example of: a. receptor-mediated exocytosis. b. receptor-mediated endocytosis. c. phagocytosis. d. pinocytosis. e. simple diffusion dau sed dleExplain three ways 2 of the 3 subunits (urinary system, nervous system and endocrine system) impacts homeostasis37. Which of the following normal physiologic processes uses a positive feedback loop? Group of answer choices regulation of fluid balance temperature regulation childbirth blood pressure regulation
- Which of the following is true of positive feedback? a. The change is opposite that of negative feedback b. The effector turns off the response c. The change is amplified What is the difference between the answers a & b?Figure 33.21 State whether each of the following processes are regulated by a positive feedback loop or a negative feedback loop. A person feels satiated after eating a large meal. The blood has plenty of red blood cells. As a result, erythropoietin, a hormone that stimulates the production of new red blood cells, is no longer released from the kidney.3b. An additional gene, called W, is found that affects the synthesis of enzymes 1 and 2. Mutant d has a recessive mutation in gene W. genotype enzyme activity without fictamine 1 with fictamine 1 2 strain W X Y Z 2 wild-type + + + + ++ mutant a + + mutant b mutant c mutant d ++ + + + T + + + + ++ + + 1 1 + ! ++ ++ ++ 1 ++ ! ! ! ++
