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11 Dec 2019

A left shifted oxyhemoglobin curve during exercise would essentially ___________.

increase oxygen unloading and therefore delivery to working muscles

decrease oxygen loading in the lungs

decrease oxygen unloading and therefore delivery to working muscles

have no effect on oxygen unloading or delivery to working muscles

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Lelia Lubowitz
Lelia LubowitzLv2
13 Dec 2019
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Related questions

2) As exercise intensity increases, the respiratory systemincreases oxygen delivery to the body via the lungs by up to 10 to20-fold. Answer the following questions to help you understand howthis increase in oxygen delivery occurs (1 point each)

A. What are simple ways to increase ventilation to the lungs(i.e. change minute ventilation)?

B. How can the volume of oxygen delivery to the blood beincreased without increasing lung ventilation?

C. Describe how the following factors alveolar ventilation. Deadspace Airway resistance Compliance (or lack thereof) of thelung/chest

D. Given these effects, which of the following two strategieswould be best for increasing alveolar ventilation: Larger tidalvolumes Higher breathing frequency Explain.

E. Based on your answers to questions A and C, form a hypothesisfor how you think respiration will change at the onset of exercisein order to increase alveolar ventilation. Briefly explain why.

1) At what point is the amount of oxygen at its highest?

in the capillaries during strenous activity

in the lungs

in the capillaries at rest

in muscle tissue during strenous activity

2) You have diagnosed a patient with an iron deficiency. Themost likely result of this is

low carbon dioxide content

very red blood

low oxygen content

high oxygen content

3) Why are insects limited to relatively small sizes?

Their respiratory system relies on diffusion which is slow overlong distances

Their respiratory muscles are smooth muscle only

They have a closed circulatory system

Their exoskeleton cannot support larger-bodied animals

4) Air rushes into the lungs of humans during inhalationbecause

the volume of the thoracic cavity increases

pressure in the alveoli increases

the diaphragm contracts and pushes upward on the chestcavity

smooth muscle lining the trachea and bronchi contracts andcauses their volume to increase

12. Passive expiration is preceded by the:

a. recoil of the lungs

b. contraction of the internal intercostals muscles.

c. contraction of the diaphragm.

d. increase in atmospheric pressure.

e. increase in CO2 in the blood

14. Type I alveolar cells:

a. secrete surfactant.

b. are squamous epithelial cells.

c. are macrophages.

d. function mainly in the diffusion of gases.

e. Both B and D.

15. Which of the following structures is NOT a part of the respiratory system?

a. external nares

b. uvula

c. epiglottis

d. choanae

e. mouth

19. Which of the following is NOT considered a function of the respiratory system?

a. Regulation of acid-base balance

b. Production of sound

c. Filtering inspired air

d. Transport of oxygen and carbon dioxide to tissue cells

e. Intake of oxygen and elimination of carbon dioxide

20. Breathing is more difficult in higher altitudes because the

a. air weighs less

b. partial pressure of atmospheric oxygen is lower

c. partial pressure of atmospheric carbon dioxide is higher

d. partial pressure of atmospheric nitrogen is lower

e. partial pressure of atmospheric oxygen is higher

27. During expiration a decrease in thoracic cavity size causes a (an) in pressure thus causing the lungs to recoil resulting in a (an) in pressure respectively.

a. decrease intraplueral; decrease intrapulmonary

b. decrease intraplueral; increase intrapulmonary

c. increase intraplueral; decrease intrapulmonary

d. decrease intrapulmonary; increase intraplueral

e. increase intrapleural ; increase intrapulmonary

66. During _____________ ______________, oxygen enters the blood and carbon dioxide leaves the blood, and enters the alveoli.

68. Hemoglobin buffers the pH of the cytosol of RBC by combining with ______ions

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