Exam 3 Flashcards
In the mammalian temperature regulation system: The vasculature of the skin corresponds with ____
The temperature receptors in the spinal chord correspond with ___
The hypothalamus corresponds with ___
Effector
Sensors
integrator
After a carbohydrate containing meal
The pancreas secretes insulin
An adult, non-growing, deer mouse assimilates 10 Kcal/day. Of these, 40% are used for temperature regulation, 25% are used to fuel basal metabolism, and 15% are used for activity. How many Kcal per day remain for storage of lipids and reproduction? Assume that the cost of excretion is negligible
2
Animals are primarily lipids as energy storage molecule because
they have twice the amount of energy/gram than carbohydrates
Before entering into hibernation, bears become hyperphagic and store a lot of energy. You enter the den of a bear and measure its rate of oxygen consumption and its rate of carbon dioxide production. You find that the rate of O2 consumption is 1260 mL/min. Therefore the bear’s rate of CO2 production should be
882 mL/min
The stimulus for the secretion of gherlin is:
an empty stomach
when a hummingbird is flying and feeding on nectar, its rate of CO2 production is 360 ml/min. When it is resting and fasting, the rate is 100 ml/min.
This means that the rate of O2 consumption in the flying hummingbird is ___. Whereas that of the resting one is ___
360, 143 mL/min
The cardiac rate of a frog at an environmental temperature of 35 degrees Celsius is 60 beats/min.. Assuming a Q10 of 2, the heart rate at 15 degrees Celsius will be
15
The metabolic rate of a 100 g trout at an environmental temperature of 5 degrees Celsius is a 5 mL O2/h. Its metabolic rate at 15 degrees celsius is approximately (assume Q10-2)
10 ml O2/h
The cardiac rate of a frog at an environmental temperature of 35 degrees Celsius is 60 beats/min.. Assuming a Q10 of 2, the heart rate at 25 degrees Celsius will be
30
Animals use primarily lipids as energy storage molecules because
they can be stored with little associated water
A flying hummingbird consumes 125 mL of oxygen per hour and produces 124 mL/h of carbon dioxide. What kind of organic compound is this bird using to fuel its metabolism for one hour
carbohydrates
It is a mild day in Wyoming. Ambient temperature is -20 degrees celsius (-4 degrees F). The wind is blowing at 20 mph. The wind chill factor is
-42 degrees celcius
The following figure shows the relationship between the metabolic rate of the spadix of skunk cabbage and ambient temperature. Spadix of this plant is ___ and that its body temp is approximately__ (see graph)
endothermic, 21 degrees C
When iguanas are injected with dead bacteria they (see graph)
choose warmer temp
An Angus heifer weighs about 600 kg. A white tailed prairie dogs weighs about 1 kg. This means
600 prairie dogs eat more than the cow
In mammals, the rate of population growth under optimal condition depends on (body mass) -1/4. This observation implies that the rate of population growth rate of elephants (4,600 kg) is ___ than that of horses (500 kg)
lower
(500^-.25)/(4600^-.25)=1.74
horses have population growth rates that are 74% higher than elephants
In mammals, surface area (SA in cm^2) increases with body mass (Mb, in grams) as:
SA= 12.3 Mb ^0.65
SA/Mb=12.3 Mb^-0.35
SA/Mb ^0.65/ Mb 12.3 Mb^ 0.65-1
(X^3/X^4)^2
=X^-2
(X^3-4)^2=(X^-1)^2=X^(-1*2)=X^-2
If you drive the road from laramie to casper in summer at dusk, you often find prairie rattlesnakes on the black asphalt. They are gaining heat from the roads surface by:
conduction
Assume that the temperature of a normothermic black tailed prairie dog is 36 degrees celsius. While hibernating and in torpor, its temperature is 6 degrees celsius. This means that the animals rate of oxygen consumption (VO2) during hibernation is __ that of normothermia. Assume a Q10 of 2
1/8
A male african elephant weighs 11,000 kg, whereas a piebald shrew weighs 11 g
6 orders of magnitude
ATP will bind to a site in PFK and inhibit it. The result is reduction in the rate of glycolysis. This is an example of
allosteric inhibition
The transport of glucose into red blood cells (erythrocytes) can only take place when the concentration of glucose in plasma is higher than that inside of the erythrocyte. Transport rate saturates, and does not require energy. This is an example of
facilitated transport
Lymph is a tissue that contains white blood cells (especially lymphocytes) in a yellowish/ white fluid and that circulates through the lymphatic system carrying nutrients and metabolites. Lymph is an example of a
fluid connective tissue
Which of the following tissues does not include excitable cells
epithelial tissue
