Endothermic homeotherms, like mammals, maintain a high internal body temperature, whereas ectothermic poikilotherms, like some reptiles, have internal body temperatures that fluctuate depending on the ambient temperature of their environment. Based on their metabolism, why might mammals have determinate growth whereas some reptiles have indeterminate growth?
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- Endothermic animals can maintain consistent temperature conditions by generating, main- taining, and regulating their body heat. Under cold conditions, more body heat becomes lost to the environment. Endothermic ani- mals rely on different mechanisms that allow them to maintain their body heat. Which of the following mechanisms that occur in endothermic animals does not describe a mechanism by which they maintain their body heat under these types of conditions? A B с D Some endothermic animals hibernate during extreme environmental conditions, which decreases the rate of metabolic reaction and decreases heat loss. The tissues of the blood vessels of many endothermic animals can dilate and move closer to the skin, allowing for heat to move more readily into the environment. Shivering, which can occur involuntarily in most endothermic animals, produces rapid muscle contractions, which increase the rate of cellular respiration and thereby increase heat production. Layers of densely packed…Describe the mechanisms that allow animals to maintaintheir core body temperature when the temperature of theirenvironment fluctuates.Energy from the breakdown of ATP provides the kinetic energy formuscle movement. Why does body temperature increase duringexercise?
- Thermoregulation is the process by which animals maintain an internal temperature within a tolerable range. Which of the following statement is NOT TRUE about Thermoregulation ? Lütfen birini seçin: O a. Endothermic animals generate heat by metabolism O b. Ectothermic animals gain heat from external sources O c. In general, ectotherms tolerate greater variation in internal temperature, while endotherms are active at a greater range of external temperatures O d. Ectothermy is more energetically expensive than endothermyThe transport of glucose into and out of most cells, such as muscle cellsand adipocytes, occurs by facilitated diffusion. Once glucose entersa cell, it is rapidly converted to another molecule, such as glucose-6-phosphate or glycogen. What effect does this conversion have on thecell’s ability to acquire glucose? Explain.You are studying a large tropical reptile that has a high and relatively stable body temperature. How do you determine whether this animal is an endotherm or an ectotherm? (A) You know from its high and stable body temperature that it must be an endotherm. (B) You subject this reptile to various temperatures in the lab and find that its body temperature and metabolic rate change with the ambient temperature. You conclude that it is an ectotherm. (C) You note that its environment has a high and stable temperature. Because its body temperature matches the environmental temperature, you conclude that it is an ectotherm. (D) You measure the metabolic rate of the reptile, and because it is higher than that of a related species that lives in temperate forests, you conclude that this reptile is an endotherm and its relative is an ectotherm.
- Which of the following are negative physiological feedback loops? Group of answer choices Osmoregulation in mammals Thermoregulation in mammals Generation of action potential in animal neurons Physiological mechanisms leading to labor and birth in eutherian mammals pH maintenance in animal cellsWhich of the following is a correct statement about endothermic organisms? A. Compared to ectotherms, since they cannot have their internal body temperature leave the thermoneutral zone, they are limited with regard to the types of environments they can live in. B. Endotherms do not typically use passive mechanisms for thermoregulation, such as insulation, because they utilize metabolic energy to control body temperature. C. The trait of endothermicity is a derived characteristic in mammalian animals and is not seen in other phylogenetic branches in the Metazoan Clade. D. All endotherms possess sweat glands, which allow them to conduct evaporative cooling to lower their body temperature when needed. E. None of the aboveThe Mojave Desert of the western United States is characterized by a hot, dry climate. Scientists predict that temperatures in this region will increase by an average of 4.7° F over the next 30 years. Birds found here (like ground-dwelling roadrunners) are endotherms and have many adaptations to reduce the amount of heat absorbed into the body while active in the daytime. If temperatures increase in this area as predicted, how might the plumage (the feathers covering the body) of these roadrunners change under the influence of natural selection? 1:The plumage will likely become longer and increase heat absorption into the body. 2:The plumage will likely become darker and increase heat absorbed from the environment. 3:The plumaqe will likely become lighter and increase heat reflected away from the body. 4:The plumage will likely become thicker and increase the amount of heat trapped by the body.
- 61. Which of the following would not be interpreted as an adaptation to a very dry environment?a. longer-than-normal loops of Henle in the vertebrate kidneyb. a gland that excretes a dilute salt solutionc. water-impermeable layer of wax on insect exoskeletond. enzymes that convert ammonia to uric acid 62. Which of the following statements is true about the flow of energy through the food pyramid?a. The most energy is at the top of the pyramid, with the tertiary consumers, because the energy increases at each level.b. The most energy is at the bottom of the food pyramid because some is lost as it is passed from producer to each level of consumer.c. The energy is distributed equally at each level of the pyramid; very little is lost or added moving from producers to tertiary consumers.d. Energy doesn’t flow through the food pyramid; each level receives energy from the sun.e. It depends on the ecological community; in some, there is more energy at the top of the food pyramid, and in…1) It is _____for aquatic vertebrates to maintain a body temperature different from their surroundings because ______. A) easier; water is a much better insulator than air due to its greater density B) easier; it is possible for fish to absorb heat from the surrounding water by countercurrent exchange even when the water is colder than the fish C) harder; water is a better conductor of heat than air D) harder; terestrial vertebrates can use countercurrent exchange to absorb heat from air that is cooler than their bodies 2) Compared to terrestrial environments, marine environments have_____." A) greater differences in temperature between hot and cold seasons B) smaller differences in temperature between hot and cold seasons C) the same amount of seasonal variability in temperaturefor aquatic animals such as sharks, how do the animals maintain their body temperature when they are in warmer or colder waters? do they have a method where they can decrease or increase their body temperatures slightly such as torpor in birds?