Cardiovascular Response to Excercise and Mechanical Ventilation

1.

1 point

Which of the following would not produce an elevated A-a gradient?

Atrial septal defect

Severe pneumonia

Pulmonary embolism

Right-to-left Patent ductus arteriosus

All of these would cause an elevated A-a gradient.

2.

1 point

True or False: Usain Bolt has a linear VCO2:VO2 curve during his 400m dash.

True

False

3.

1 point

True or False: In volume targeted mechanical ventilation, the pressure is inversely proportional to respiratory system compliance.

True

False

4.

1 point

During exercise, capillary distension occurs most in which area of the lung?

Zone I

Zone II

Zone III

None of the above

5.

1 point

True or False: The critical extraction ratio for someone during exercise is greater than that of the same person at rest.

True

False

6.

1 point

An obese patient comes to your physiology laboratory for an oxygen consumption test. How would his/her oxygen consumption compare to that of a healthy person at 1.) rest and 2.) anaerobic threshold?

less, greater

less, same

less, less

greater, greater

greater, less

greater, same

7.

1 point

Which of the following would cause an increase in the minute consumption of oxygen?
I: Increased arterio-venous O2 gradient
II: Parasympathetic stimulation of the heart
III: Increased FeO2
IV: Epinephrine injection

II, III

I

I, II, IV

I, IV

All of the above

8.

1 point

True or False: CO increases linearly with exercise.

True

False

9.

1 point

While on a ventilator, which of the following will cause an increase in Peak pressure, but no change in plateau pressure?

Left lung collapses

The patient pulls the tube out of their mouth

The patient's airways get irritated and begin to spasm.

Interstitial lung disease worsens

10.

1 point

True or False: An endurance trained 60-yr-old athlete is likely to have a greater maximal oxygen uptake than a sedentary 20-yr-old video game developer.

True

False

11.

1 point

Which of the following would NOT be an indication for mechanical ventilation?

Heroin overdose

Collapsed left lung

A pearl diver who passed out when coming up for air

Methamphetamine overdose

Severe asthma

12.

1 point

Which of the following does not increase during intense exercise?

pH

PalvCO2

Tidal volume

Minute Ventilation

13.

1 point

The respiratory quotient for a typical person during exercise will ______.

Stay the same

Cannot tell from the information given

Increase

Decrease

14.

1 point

For a patient with obstructive lung disease on mechanical ventilation, what would you set the PEEP to?

10 mmHg

0 mm Hg

5 mmHg

15 mmHg

15.

1 point

True or False: The energy cost to climb up a flight of stairs is less for a healthy 22-year-old than for a sedentary 70-year-old.

True

False

16.

1 point

Which component of oxygen consumption would you NOT expect to change with exercise?

CvO2

All of these would change

SV

HR

CaO2

17.

1 point

True or False: In pressure targeted mechanical ventilation, an increase in compliance would cause a decrease in tidal volume.

True

False

18.

1 point

If you double the tidal volume, what affect will you have on PACO2?

Need more data

Same

Double

Half

19.

1 point

What effect does exercise have on the oxyhemoglobin dissociation curve?

No change

Shifts up

Shifts right

Shifts left

Shifts down

20.

1 point

Which of the following do NOT increase during exercise?

SV

TV

RR

VO2

All of the above decrease during exercise

None of the above decrease during exercise

21.

1 point

In mechanical ventilation what parameters are adjusted to improve oxygenation?
I: Peep
II: RR
III: FiO2
IV: TV

III, IV

II ,IV

II, III, IV

I, III

All of these

22.

1 point

True or False: The VO2 max determines the amount of work the body can perform.

True

False

23.

1 point

True or False: Supply dependent coupling of oxygen delivery and consumption is ALWAYS pathologic.

True

False

24.

1 point

Which of the following has the LOWEST respiratory quotient?

Protein

Fat

Carbohydrate

They all have the same RQ

25.

1 point

During exercise, what happens to system vascular resistance, blood pressure, and blood flow?

increase, decrease, increase

decrease, decrease, increase

decrease, increase, increase

increase, increase, increase

26.

1 point

A marathon runner is typically restrained in his/her maximum performance by:

aerobic threshold

lactic acid build up

musculo-skeletal damage

urination &/or defecation

27.

1 point

Which of the following does NOT change during moderate exercise?

FRC

V/Q ratio

Physiologic dead space

Pulmonary perfusion

28.

1 point

Which of the following is NOT reflected when measuring oxygen consumption? (VO2)?

Aerobic capacity

Respiratory rate

DO2

Metabolic rate