Lab VII Practice Exams

Which of the following would increase the number of GLUT4 transporters in the muscle cell membrane?

a) cortisol

b) muscular activity/exercise

c) growth hormone

d) insulin

e) glucagon

f) norepinephrine

g) epinephrine

b) muscular activity/exercise

d) insulin

Which of the following is/are hormones that would tend to increase blood lactate?

a) insulin

b) epinephrine

c) pyruvate dehydrogenase

d) glucagon

e) hormone sensitive lipase

f) phosphofructokinase

g) glycogen synthase

h) phosphorylase

b) epinephrine

d) glucagon

Which of the following hormones would tend to inhibit hepatic and muscle glycogenolysis? select all that apply

a) insulin

b) epinephrine

c) growth hormone

d) cortisol

e) glucagon

f) norepinephrine

g) glycogen

a) insulin

Which of the following is/are NOT true about the effects of training on fuel substrate choice?

a) all of these answers

b) after training, at a given submaximal intensity, a trained subject would secrete less epinephrine and glucagon, so there would be less stimulation of glycogenolysis, and thus less reliance on carbohydrates

c) untrained subjects would tend to have more fat stores, and this is the main reason that untrained subjects rely more on fats than trained subjects

d) training increases muscle mitochondrial content, which increases their ability to use fats

e) At a given intensity, a trained subject would rely more on fats than an untrained subject

c) untrained subjects would tend to have more fat stores, and this is the main reason that untrained subjects rely more on fats than trained subjects

Your subject is a college aged female who ran at a moderate intensity on a treadmill for 44 minutes. Her resting VO2 was 0.25  L/min, her resting VCO2 was 0.25 L/min, her exercise VO2 was 2.28 L/min, and her her exercise RER was 0.87, how many kcals of fat did she expend during this exercise bout? no units required

193.8

Your subject is a 148 pound female exercising in a 20.3ºC lab. Her HR is 111 bpm, her blood lactate is 2mM, her VO2 is 2.53 L/min, her RER is 0.83, her core temperature is 38.1ºC, her average skin temperature is 36ºC, and her resting VO2 was 0.25 L/min. What is her thermal gradient? no units required

2.1

Thermal Gradient = core temp - skin temp

= 38.1-36 = 2.1

In one of our lab VII experiments we looked at the effects of intensity on fuel substrate use. Which of the following statements regarding exercise intensity and fuel substrate use is/are NOT true?

a) during moderate intensity exercise a smaller percentage of calories come from fats than during low intensity exercise

b) at higher intensities the percentage of calories coming from circulating fatty acids increases

c) high intensity exercise is associated with greater recruitment of slow twitch fibers, which tends to increase carbohydrate use

d) high intensity exercise decreases insulin secretion, which tends to increase muscle glycogenolysis

e) high intensity exercise increases epinephrine secretion, which tends to increase glycogen breakdown

f) the absolute number of fat calories burned at moderate intensities may be equal or greater than the fat calories burned during low intensity exercise

g) high intensity exercise increases cytoplasmic calicum concentrations, which increaseses the activity of phosphorylase, which increases carbohydrate use

b) at higher intensities the percentage of calories coming from circulating fatty acids increases

c) high intensity exercise is associated with greater recruitment of slow twitch fibers, which tends to increase carbohydrate use

Which of the following would tend to increase glycogen stores?

a) phosphofructokinase

b) hormone sensitive lipase

c) glucagon

d) insulin

e) glycogen synthase

f) epinephrine

g) pyruvate dehydrogenase

h) phosphorylase

d) insulin

e) glycogen synthase

A version of this figure can be found in your textbook and is taken from a classic study by Romjin et al (Am J Physiology, 1993). It depicts different sources of fuel used to support muscular activity at different intensities. Please match the major sources of fuel with the correct shaded ares on the figure.(Note: you do not need to memorize this figure - think about what fuels are used preferentially in these different intensity ranges. )

i: muscle glycogen

ii: muscle triglycerides

iii: plasma free fatty acids

iv: plasma glucose

Your subject is a college aged female who ran at a moderate intensity on a treadmill for 80 minutes. Her resting VO2 was 0.24  L/min, her resting VCO2 was 0.25 L/min, her exercise VO2 was 2.1 L/min, and her her exercise RER was 0.70, how many kcals of carbohydrates did she expend during this exercise bout? no units required

0

(% use of carbs when RER is 0.7 = 0)

Which of the following would be associated with low PFK activity in the body?

a) a decrease in citrate

b) a decrease in ATP

c) high intensity exercise

d) increased recruitment of type IIX muscle fibers

e) an increase in ATP

f) an increase in pH

g) low intensity exercise

h) an increase in ADP

i) a decrease in ADP

j) an increase in citrate

k) a decrease in hydrogen ions

e) an increase in ATP

g) low intensity exercise

i) a decrease in ADP

j) an increase in citrate

If the weather report (or your sling psychrometer) say that the wet bulb temperature was 51F and the dry bulb temperature was 75F. The temperature in the lab was 22C (75F), the subject's core temperature was 37.1C, and their skin temperature was 34.4. Which of the following are true about the humidity under these circumstances?

a) it is very humid

b) the information provided does not have enough information to identify the humidity

c) it is neither very humid nor very dry

d) there is low humidity

d) there is low humidity

Which of the following hormones would increase gluconeogenesis in the liver? Select all that apply

a) insulin

b) glucagon

c) cortisol

d) norepinephrine

e) this process doesn’t occur in this tissue

f) epinephrine

b) glucagon

c) cortisol

d) norepinephrine

f) epinephrine

Which of the following is an enzyme that promotes glylcogenolysis?

a) phosphorylase

b) phosphofructokinase

c) glucagon

d) glycogenesis

e) insulin

f) glycogen synthase

g) glycogen

a) phosphorylase

Your subject is a college aged female who ran at a moderate intensity on a treadmill for 69 minutes. Her resting VO2 was 0.19  L/min, her resting VCO2 was 0.25 L/min, her exercise VO2 was 1.54 L/min, and her her exercise RER was 1.00, how many kcals of fat did she expend during this exercise bout? no units required

0

(% use of fats when RER is 1.00 = 0)

Which of the following would be associated with less glycolysis in the body?

a) a decrease in citrate

b) an increase in ADP

c) an increase in ATP

d) increased recruitment of type IIx fibers

e) an increase in pH

f) a decrease in ATP

g) a decrease in hydrogen ions

h) an increase in citrate

i) high intensity exercise

j) a decrease in ADP

k) low intensity exercise

c) an increase in ATP

h) an increase in citrate

j) a decrease in ADP

k) low intensity exercise

Glycogen synthase catalyzes which of the following processes?

a) Glycogenesis

b) none of the above

c) Glycogenolysis

d) Glycolysis

e) Gluconeogenesis

a) Glycogenesis

If the weather report (or your sling psychrometer) say that the wet bulb temperature was 62F and the dry bulb temperature was 75F. The temperature in the lab was 22C (75F), the subject's core temperature was 37.1C, and their skin temperature was 34.4. Which of the following are true about the humidity under these circumstances?

a) it is very humid

b) the information provided does not have enough information to identify the humidity

c) it is neither very humid, nor very dry

d) there is low humidity

c) it is neither very humid, nor very dry

Which of the following hormones would tend to increase liver glycogenolysis?

a) glucagon

b) epinephrine

c) norepinephrine

d) glycogen

e) cortisol

f) insulin

a) glucagon

b) epinephrine

c) norepinephrine

Which of the following statements is/are NOT true?

a) During exercise in a thermoneuteral environment, core temperature goes up a little bit, but evaporative cooling keeps skin temperature relatively cool such that there is a large thermal gradient and good ability to transfer heat from the core to the skin

b) the part of the central nervous system that has the primary responsibilty of monitoring body temperature and maintaining it is the hypothalamus

c) Radiation, Conduction, Convection, and evaporation are mechansims of heat transfer. At rest humans lose most of their heat by conduction

d) During exercise in a hot and humid environment, skin temperature goes up, which reduces the thermal gradient, decreases the ability to transfer heat from the core to the skin, and results in significant increases in core temperature

e) evaporation is responsible for most of the heat loss during exercise in humans

f) two of these answers (are NOT true)

c) Radiation, Conduction, Convection, and evaporation are mechansims of heat transfer. At rest humans lose most of their heat by conduction

Your subject is a college aged female who ran at a moderate intensity on a treadmill for 26 minutes. Her resting VO2 was 0.37  L/min, her resting VCO2 was 0.25 L/min, her exercise VO2 was 2.08 L/min, and her her exercise RER was 0.75, how many kcals of carbohydrates did she expend during this exercise bout? no units required

31.0

Which of the following blood glucose values falls in the normal (not hyperglycemic, diabetic, or hypoglycemic) fasting range ? (note: mg% = mg/100ml = mg/dl)

a) 80mg%

b) 8mg%

c) 600mg%

d) 1.5mg%

e) 140mg%

a) 80mg%

If the weather report (or your sling psychrometer) say that the wet bulb temperature was 53F and the dry bulb temperature was 80F, and your subject's core temperature was 37.4C, and their skin temperature was 34.2. Which of the following are true about the humidity under these circumstances?

a) there is low humidity

b) it is very humid

c) it is neither very humid, nor very dry

d) the information provided does not have enough information to identify the humidity

a) there is low humidity

In one of our lab VII experiments we looked at the effects of intensity on fuel substrate use. Which of the following statements regarding exercise intensity and fuel substrate use is/are NOT true?

a) during moderate intensity exercise a smaller percentage of calories comes from circulating fuels than during low intensity exercise

b) high intensity exercise is associated with greater recruitment of fast twitch fibers, which tends to increase carbohydrate use

c) high intensity exercise increases cytoplasmic calicum concentrations, which increaseses glycogenolysis

d) an increase in ADP concentrations when we go from low to moderate intensity exercise would decrease PFK activity and  increase carbohydrate use

e) high intensity exercise increases epinephrine secretion, which tends to increase muscle glycogen breadkwon

f) high intensity exercise decreases insulin secretion, which tends to decrease phosphorylase activity, which tends to increase carbohydrate use

g) the amount of calories coming from intramuscular triglycerides increases when we change from low to moderate intensity exercise

d) an increase in ADP concentrations when we go from low to moderate intensity exercise would decrease PFK activity and  increase carbohydrate use

f) high intensity exercise decreases insulin secretion, which tends to decrease phosphorylase activity, which tends to increase carbohydrate use

Which of the following hormones would increase glycogenolysis in adipose tissue? select all that apply

a) glucagon

b) growth hormone

c) insulin

d) norepinephrine

e) epinephrine

f) cortisol

g) this process doesn’t occur in this tissue

g) this process doesn’t occur in this tissue

Which of  the following enzymes would tend to increase storage of fatty acids as triglycerides in adipose tissue?

a) hormone sensitive lipase

b) lipoprotein lipase

c) none of these answers

d) phosphorylase

e) phosphofructokinase

b) lipoprotein lipase

Which of the following is an enzyme that promotes glycogenesis?

a) glycogen synthase

b) glucagon

c) phosphofructokinase

d) insulin

e) glycogen

f) phosphorylase

g) gylcogenolysis

a) glycogen synthase

Which of the following would be associated with high PFK activity in the body?

a) low intensity exercise

b) an increase in ADP

c) an increase in ATP

d) a decrease in ADP

e) a decrease in ATP

f) increased recruitment of IIX muscle fibers

g) an increase in hydrogen ions

h) high intensity exercise

i) an increase in citrate

j) a decrease in citrate

k) a decrease in pH

b) an increase in ADP

e) a decrease in ATP

f) increased recruitment of IIX muscle fibers

j) a decrease in citrate

Which of the following is/are hormones that would tend to increase triglyceride stores in adipose tissue?

a) phosphorylase

b) hormone sensitive lipase

c) phosphofructokinase

d) epinephrine

e) glucagon

f) glycogen synthase

g) insulin

h) pyruvate dehydrogenase

g) insulin

Which of the following is/are hormones that would tend to increase muscle glycogen storage?

a) pyruvate dehydrogenase

b) hormone sensitive lipase

c) phosphorylase

d) glycogen synthase

e) glucagon

f) phosphofructokinase

g) epinephrine

h) insulin

h) insulin

Which of the following is the primary method for dissipating heat during exercise?

a) radiation

b) conduction

c) evaporation

d) convection

c) evaporation

Which of the following hormones would increase gluconeogenesis in the liver? select all that apply

a) insulin

b) this process doesn’t occur in this tissue

c) glucagon

d) epinephrine

e) norepinephrine

f) cortisol

c) glucagon

d) epinephrine

e) norepinephrine

f) cortisol

Which of the following hormones would tend to inhibit glucose uptake by adipose tissue and muscle (at rest)?

a) glycogen

b) insulin

c) epinephrine

d) norepinephrine

e) growth hormone

f) cortisol

g) glucagon

e) growth hormone

f) cortisol

g) glucagon

If the weather report (or your sling psychrometer) say that the wet bulb temperature was 68F and the dry bulb temperature was 80F, and your subject's core temperature was 37.4C, and their skin temperature was 35.2. Which of the following are true about the humidity under these circumstances?

a) there is low humidity

b) it is neither very humid, nor very dry

c) the information provided does not have enough information to identify the humidity

d) it is very humid

b) it is neither very humid, nor very dry

Which of the following is/are hormones that would tend to increase glycogenesis?

a) insulin

b) glucagon

c) phosphorylase

d) phosphofructokinase

e) hormone sensitive lipase

f) epinephrine

g) glycogen synthase

h) pyruvate dehydrogenase

a) insulin

Which of the following hormones would inhibit muscle protein breakdown? select all that apply

a) glucagon

b) cortisol

c) norepinephrine

d) glycogen

e) epinephrine

f) growth hormone

g) insulin

f) growth hormone

g) insulin

which of the following is/are hormones that would tend to increase muscle glycogen breakdown?

a) hormone sensitive lipase

b) glucagon

c) pyruvate dehydrogenase

d) insulin

e) epinephrine

f) phosphofructokinase

g) glycogen synthase

h) phosphorylase

b) glucagon

e) epinephrine

Which of the following is/are hormones that would tend to increase triglyceride stores in adipose tissue?

a) hormone sensitive lipase

b) phosphofructokinase

c) glycogen synthase

d) epinephrine

e) insulin

f) glucagon

g) phosphorylase

h) pyruvate dehydrogenase

e) insulin

Which of the following hormones would inhibit lipolysis in adipose tissue?

a) cortisol

b) norepinephrine

c) insulin

d) glucagon

e) growth hormone

f) glycogen

g) epinephrine

c) insulin

If the weather report (or your sling psychrometer) say that the wet bulb temperature was 56F and the dry bulb temperature was 67F, and your subject's core temperature was 37.1C, and their skin temperature was 33.2. Which of the following are true about the humidity under these circumstances?

a) it is very humid

b) it is neither very humid, nor very dry

c) there is low humidity

d) the information provided does not have enough information to identify the humidity

b) it is neither very humid, nor very dry