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BIOL 221 Lecture Notes - Lecture 7: Partial Pressure, Glycerol, Cellular Respiration

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peachbeetle258
3 Mar 2020
School
Towson University
Department
Biology
Course
BIOL 221
Professor
Ellen Lathrop-Davis

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Document Summary

In lungs: partial pressure ~104 mm hg. Po2 of pulmonary venous blood ~ 98 mm hg. In the lungs the high partial pressure of oxygen (around 104 mm hg) maintained by ventilation favors binding to form oxyhemoglobin. The po2 in pulmonary venous blood and, therefore, systemic arterial blood, is around 95 mm hg. The partial pressure of oxygen in the systemic tissues is much lower. The exact number depends on the metabolic rate within the tissue. In a resting muscle the po2 is often around 40 mm hg while it may drop to around 15 mm hg in an active muscle. This favors unloading of oxygen from hemoglobin to form deoxyhemoglobin. List four methods of measuring the blood"s oxygen-carrying capacity. Define anemia and list the types of anemia studied in topic 1. Aerobic: glucose + 6 ___ 6 ___ + 6 h2o + atp. Carbonic acid (co2 + h2o h2co3)

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Related Questions

Which of the following is correct?

Question 8 options:

A)

The partial pressure of oxygen in systemic venous blood is normally 40 mm Hg.
B)

The partial pressure of carbon dioxide in systemic venous blood is normally 40 mm Hg.
C)

The partial pressure of oxygen is normally lower in the alveoli than in systemic arterial blood.
D)

The partial pressure of carbon dioxide is normally higher in the alveoli than in systemic arterial blood.
E)

The partial pressures of carbon dioxide in the alveoli and pulmonary arterial blood are the same.

PHYSIOLOGY

11. A subject is connected at FRC to a bag containing 2L of 8% He, 92% O2. He rebreathes from the bag until mixing is complete; at which time the fraction of He is 4.6%. What is the value of FRC?

A. 1.15L

B. 1.48L (can you please explain this answer)

C. 2.48L

D. 3.48L

E. It cannot be calculated from the information given

The minimum time it takes a normal person to go from residual volume (RV) to total lung capacity (TLC) is less than the minimum amount of time to go from TLC to RV. The most probable explanation for this effect is:

A. the chest wall tends to spring outward when the respiratory system is at RV.

B. the chest wall is less compliant at RV.

C. inspiratory muscles are stronger than expiratory muscles.

D. the lungs have less recoil at TLC.

E. the airways tend to collapse during forced expiration. (can you please explain why this is the answer)

Two gases, A and B have the same partial pressure difference across the alveolar capillary barrier. Gas A has a molecular weight of 36 and solubility of 24 while gas B has a molecular weight of 16 and solubility of 2. What is the rate of diffusion of gas A through the barrier compared to gas B?

A. 12:1

B. 8:1 (can you explain why B is the answer?)

C. 6:4

D. 4:1

E. They are the same.

If an individual with a tidal volume of 500 ml and a dead space volume of 100 ml were to exercise and double the CO2 production, with no change in respiratory rate, what tidal volume would be required to maintain their original PCO2 of 40 mm Hg?

A. 1200 ml

B. 1100 ml

C. 1000 ml

D. 900 ml (can you explain why the answer is D?)

E. 800 ml

39. What is the total amount of oxygen in the arterial blood (in ml O2 /100ml blood) of an individual who has PO2=90mm Hg, PCO2=40mm Hg, Hb=15g/100ml, hemoglobin saturation = 95%, (solubility coefficient of O2=0.003 ml O2/100 ml blood/mm Hg; at saturation Hb binds 1.34 ml O2/g)

A. (0.95 x 15) + (95 x 0.003)

B. (90 x 1.34 x 15) + (95 x 0.003)

C. ((90 - 40) x 1.34 x 0.95) + (90 x 0.003)

D. (0.95x 1.34 x 15) + (90 x 0.003) (can you explain why the answer is D?)

E. none of the above