Exam 3

Question 1

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 ___

Answer 1

Effector
Sensors
integrator

Question 2

After a carbohydrate containing meal

Answer 2

The pancreas secretes insulin

Question 3

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

Answer 3

2

Question 4

Animals are primarily lipids as energy storage molecule because

Answer 4

they have twice the amount of energy/gram than carbohydrates

Question 5

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

Answer 5

882 mL/min

Question 6

The stimulus for the secretion of gherlin is:

Answer 6

an empty stomach

Question 7

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 ___

Answer 7

360, 143 mL/min

Question 8

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

Answer 8

15

Question 9

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)

Answer 9

10 ml O2/h

Question 10

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

Answer 10

30

Question 11

Animals use primarily lipids as energy storage molecules because

Answer 11

they can be stored with little associated water

Question 12

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

Answer 12

carbohydrates

Question 13

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

Answer 13

-42 degrees celcius

Question 14

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)

Answer 14

endothermic, 21 degrees C

Question 15

When iguanas are injected with dead bacteria they (see graph)

Answer 15

choose warmer temp

Question 16

An Angus heifer weighs about 600 kg. A white tailed prairie dogs weighs about 1 kg. This means

Answer 16

600 prairie dogs eat more than the cow

Question 17

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)

Answer 17

lower
(500^-.25)/(4600^-.25)=1.74
horses have population growth rates that are 74% higher than elephants

Question 18

In mammals, surface area (SA in cm^2) increases with body mass (Mb, in grams) as:
SA= 12.3 Mb ^0.65

Answer 18

SA/Mb=12.3 Mb^-0.35

SA/Mb ^0.65/ Mb 12.3 Mb^ 0.65-1

Question 19

(X^3/X^4)^2

Answer 19

=X^-2

(X^3-4)^2=(X^-1)^2=X^(-1*2)=X^-2

Question 20

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:

Answer 20

conduction

Question 21

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

Answer 21

1/8

Question 22

A male african elephant weighs 11,000 kg, whereas a piebald shrew weighs 11 g

Answer 22

6 orders of magnitude

Question 23

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

Answer 23

allosteric inhibition

Question 24

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

Answer 24

facilitated transport

Question 25

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

Answer 25

fluid connective tissue

Question 26

Which of the following tissues does not include excitable cells

Answer 26

epithelial tissue