Question

yout References Mailings Review View AaBbCcDdEe AaBbCcD Normal No Spaci e. oxygen consumption is directly proportional to cellular energy production d heat production is correlated with oxygen consumption. 09 The hypothalamus serves in part as an integrated thermoregulatory center defining an organism's response to changes in its thermal environment. Because the hypothalamus normally serves to prodace metabolie changes to reverse the direction of environmental temperature change, its control is termed: a positive feedback b. homother e. negative feedback d. food forward 10. Effective adaptations used by endotherms to reduce heat loss include: a. thinner body shapes. b. shorter appendages e. increased peripheral circulation d. increased amount of brown fat. 11. Thermogenin is a an inactivated ATP synthase. b. a peoton channel. d. a protein that induces fever e. a protein not sensitive to heat. 12 During hibernation in mammals a. the thermoregulation set-point fluctuates with b. the hypothalamas is no longer the thermostat e. body temperature is unregulated. d. thermorcgulatory mechanisms are functional nomally e. None of the above. ith ambientemperanre. 13. Which of the following is the most critical influence of temperature on biological systems? a. Animals grow faster at higher temperatures. b. Biochemical reactions are temperature-dependent. . The supply of oxygen depends on temperature d. The relative humidity tends to be lower at higher semperatures e. All of the above are eritical. 14. Animal A is heavier than animal B, and animal A has a larger surface area than animal B. What predictioa can we make? a Animal A most likely has a higher metabolic rate than animal B. b. Animal B most likely has a higher metabolic rate than animal A 1 English (US) Focus 3

Answer 1

ANSWER 9 (e) Homeostasis

When there is hot environment the body sense it and the signal is send to the sweat gland to make sweat.

ANSWER 10 (d) increased amount of brown fat

brown adipose tissue are used in excessive cold or low activity days, an endotherm animal may apply mechanism adopted to heat production.

ANSWER 11 (d) a protein that induces fever.

fever is the condition of the body in which there is increase in temprature of the body, the thermogenin is uncoupling protein present in the mitochondria of brown adipose tissue that produce heat.

ANSWER12 (a) the thermoregulation set point fluctuates with ambient temperature .

because the animal hibernating has the less demand in body cells and the metabolic rate decrease and oxygen demand decrease. so the body temperature get down. this is reversible process.

ANSWER 13 (B) biochemical reactions are temperature dependent.

tropical plant grow fast in higher temperature but the biochemical reactions are elementary and essential for every living being, so this will be the most critical influence.

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