After you eat lunch, nerve cells in your stomach respond to the distension (the stimulus) resulting from the food. They rela this information to а. a control center b. a set point C. effectors d. sensors MCQ • Stimulation of the heat-loss center causes a. blood vessels in the skin to constrict b. breathing to become slow and shallow С. sweat glands to increase their output d. All of the above

After you eat lunch, nerve cells in your stomach respond to the distension (the stimulus) resulting from the food. They rela this information to а. a control center b. a set point C. effectors d. sensors MCQ • Stimulation of the heat-loss center causes a. blood vessels in the skin to constrict b. breathing to become slow and shallow С. sweat glands to increase their output d. All of the above

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter16: The Body's System

Section: Chapter Questions

Problem 1ACQ: Figure 16.2 When bacteria are destroyed by leukocytes, pyrogens are released into the blood....

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1. What is homeostasis? a. Fluctuation between high and low valuesb. Ingestion of enough food to satisfy hungerc. Tendency of the body to maintain a stable internal environmentd. Ability to remain within certain limited ranges 2. How does negative feedback lead to homeostasis? a. It shuts off the original stimulus, or reduces its intensity.b. It amplifies the effect of stimulusc. Increasing the effect of an output 3. Which statement about positive feedback is false? a. Positive feedback is observed more readily than negative feedback.b. Positive feedback reaches a limit at which it terminates quickly.c. Positive feedback amplifies the response.d. Positive feedback is exemplified by sexual behavior. 4. As fruit ripens it emits a chemical called ethylene, which attracts fruit flies. The flies damage the fruit, causing more odor to be released. As this happens, more flies are attracted to the fruit. Of what response is this an example?a. Positive feedbackb. Negative feedbackc.…
The heat you feel on your chair when you stand up wastransferred from your skin via ________.a. conductionb. convectionc. radiationd. evaporation
When faced with a sudden drop in environmental temperature, an endothermic animal will ________.a. experience a drop in its body temperatureb. wait to see if it goes lowerc. increase muscle activity to generate heatd. add fur or fat to increase insulation
You 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.
Opiates, alcohol, barbiturates, and other depressants are potentially dangerous since there is the risk ofinhibiting __________.A.digestionB.respirationC.the vomiting reflexD.blood pressue
Stimulation of the heat-loss center causes ________.a. blood vessels in the skin to constrictb. breathing to become slow and shallowc. sweat glands to increase their outputd. All of the above
Not sur ehow ot go about #'s 1, 2, and 3.
Compared to closely related species that live in warmer areas, cold dwellers tend to have larger body size and smaller appendages. Think about heat transfers between animals and the habitat, then explain why smaller appendages and larger body size are advantageous in very cold climates.
Pesticide Residues in Urine To carry the USDAs organic label (right), food must be produced without synthetic pesticides that farmers often use on conventionally grown, fruits, vegetables, and many grains. Chensheng Lu of Emory University used urine testing to see whether eating organic food has a significant effect on the levels of pesticides in children's bodies (FIGURE 40.11). Over the course of 15 days, Lu and his colleagues collected the urine of 23 children (aged 3 to 11) and tested it for breakdown products of two synthetic pesticides. The children ate their normal diet of conventionally grown foods for three days, switched to organic versions of the same foods and drinks for five days, then returned to their convention.al diet for a week FIGURE 40.11 Concentrations of metabolites of two pesticides (malathion and chlorpyrifos) in childrens urine during the three different phases of the study. The difference in the mean level of metabolites between the organic and conventional phases of the study was statistically significant. During which phase of the experiment did the children's urine contain the lowest level of the malathion metabolite?
answer the ff: A. Which part of the brain monitors the rise or fall in body temperature?Describe how this part of the brain detects any changes in body temperature. B. Vasoconstriction and vasodilation help maintain our body temperature within a normalrange. Explain how this happens. C. Other than changes in the blood vessels, state one (1) mechanism in which bodytemperature can be reduced or increased. D. Many factors can affect one’s body temperature, such as spending time in hot or coldweather conditions. Give two (2) factors that can raise or lower the body temperature.
Elimination of metabolic wastes from the body is the function of the _______________________ system(s)- like respiratory, digestive, cardio, urinary etc
In the stomach:a. muscles churn and mix the food with acids and enzymesb. glands make 3 quarts of digestive juices each dayc. food leaves as a thick liquid called chymed. all of the above