Aerobic Exercise A&P LAB

Red blood cells are very simple cells. They lack both nuclei and mitochondria. They still do need to use some ATP. What is the best ATP production method available to them?

Anaerobic metabolism

Suppose someone tried to increase their aerobic performance by having some of their own red blood cells stored (while their own bone marrow made more) then re-transfused back to them to raise their hematocrit. What would this change about the performance of the person’s circulatory system?

Each ml of blood could carry more oxygen molecules than before

What would be the best way to get a high alveolar minute volume to support exercise?

Increase both tidal volume and breaths/minute.

True or False: Working skeletal muscle tissue is warmer than muscle at rest

True

True or False: Precapillary sphincters (smooth muscle) contract in warmer environments

False

True or False: Precapillary sphincters (systemic) relax under conditions of higher carbon dioxde and lower pH.

True

True or False: Systemic precapillary sphincters constrict if oxygen levels drop.

False

True or False: Opening precapillary sphincters decreases resistance in systemic capillary beds.

True

Decreasing the resistance of a capillary bed will increase the flow through that area at the expense of areas with higher resistance.

True

If diastolic pressure is 72 mmHg, and systolic pressure is 125 mmHg, what is the mean arterial pressure?

90

If heart rate started at 86 beats/min and increased to 128 beats/min at the end of exercise, what is the percent change in heart rate after exercise compared to the pre-exercise rate?

48.8

True or False: The subject's heart rate will go up during exercise.

True

True or False: Subject cardiac output will go down during exercise.

False

True or False: Resistance of capillary beds in working muscle will go down during exercise.

True

True or False: If the subject experiences increased skin blood flow, skin temperature will go up.

True

True or False: Fit people will have higher resting heart rates than the less fit.

False

True or False: Fit people will show a smaller percentage increase in heart rate (compared to their own resting value) at 5 minutes of recovery time than the less fit people have.

True

What is the fastest source of ATP?

phosphagen systems like creatine phosphate.

What is the second fastest source of ATp?

glycolysis

What is the least fastest source of ATP?

aerobic respiration

Aerobic metabolism makes a lot more ATP per glucose than anaerobic metabolism, but it is _______

slower to start

What is instant energy type called?

ATP creatine phosphate

What is the short term energy type?

anaerobic metabolism

What is the long term energy type?

aerobic metabolism

____ reflects aerobically made ATP needed to rebuild the reserves for the fast systems

excess post exercise oxygen consumption

______ skin temperature is a sign of sympathetic autonomic activation

decreasing

The waste products of using up reserves of energy include ______

lactic acid

What is the Cori Cycle

process of re-manufacturing lactic acid into glucose in the liver

What is the most efficient form of making energy?

aerobic respiration

Are respiratory adjustments made because of carbon dioxide build up?

no