Exam 29: Fundamentals of Animal Function

Use the following to answer questions : The way in which the velocity of an airplane is controlled can be thought of as an analogy for a negative-feedback control system in an organism.Suppose an airline pilot sets an aircraft's engines to produce a velocity of 450 mph,and measures that speed using an instrument on the outside of the plane.When another pilot reports turbulence ahead,the first pilot uses the throttle to change the velocity set point to 350 mph. -According to this analogy,the throttle is

Which behavior is not one of the thermoregulatory behaviors of a lizard (a poikilotherm)?

Use the following to answer questions : Refer to the figure below. -A person weighs 60 kg (~132 lbs)and is running at a speed of 240 meters per minute.If you measured the amount of oxygen consumed in two minutes,you would find that the person had consumed approximately _______ of O₂.If you performed the same measurement on a person weighing 80 kg (~ 176 lbs)running at the same speed of 240 meters per minute,you would find that the person had consumed approximately _______ of O₂ in two minutes.

Metabolic rate is frequently measured by

As the temperature in an environmental chamber increases (from 15°C up to 25°C),the metabolic rate of a poikilotherm in the chamber,such as a lizard,_______,and that of a homeotherm in the chamber,such as a mouse,_______.

The second law of thermodynamics essentially says that

The mechanism of heat production in brown adipose tissue depends on

Which animal is likely to have the lowest BMR?

What is the probable metabolic response of a mammal exposed to an environmental temperature that begins at the lower limit of the thermoneutral zone and increases 3°-5°C above that point,staying within the thermoneutral zone?

Which statement about hibernation is false?

In a mammal,a thermoregulatory response of the hypothalamus to a rise in temperature is

The mechanisms of homeostasis

The form of energy primarily used by living organisms to do work is

Homeotherms invest energy to maintain a constant body temperature across most of the range of environmental temperatures they encounter,except in the range of environmental temperatures

The Q₁₀,which describes the sensitivity of a reaction to temperature,is calculated as the

The metabolic rate of a resting mammal at a temperature within the thermoneutral zone is called the _______.

Organisms that use preformed organic molecules as food are called _______.

During aerobic respiration,animals use an organic compound plus O₂ to produce CO₂ + H₂O + _______.

Which statement about body tissues is false?

Which animal is behaving most like a homeotherm to warm its body?