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13 Dec 2019

Hello, why is this statement *false*? I know more carbon causes more oxygen to dissociate from hemoglobin.

As carbon dioxide enters systemic blood, it causes more oxygen to dissociate from hemoglobin (the Haldane effect), which in turn allows more CO2 to combine with hemoglobin and more bicarbonate ion to be generated (the Bohr effect).

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Related questions

Match each statement with the appropriate category depending onwhether it applies to oxygen only, carbon dioxide only, or bothoxygen and carbon dioxide.

Statements: -waste product of cellular respiration
- net diffusion from lung capillaries to alveoli
- net diffusion from body tissues to blood
- required for cellular respiration
- transported by hemoglobin
- net diffusion from alveoli to lung capillaries
- sometimes transported as bicarbonate
- enters alveoli during inhalation
categories
Oxygen only:
Carbon dioxide only:
Both oxygen and carbon dioxide

1. How is CO2 transported in the blood? (pick one)

a. Most of it binds to hemoglobin alongside with oxygen

b. It competes with oxygen for the biding site with hemoglobin.

c. It forms calcium carbonate CaCO3 increasing the pH of the blood (more basic)

d. It dissolves as bicarbonate ion H2CO3 decreasing the pH of the blood (more acidic)

--------------------------------

2. Which of the following describes a closed circulatory system?

a. Nutrients diffuse from gastrovascular cavity into the tissues and waste diffuses in the opposite direction.

b. Nutrients and waste diffuse in and from the pseudocoelm

c. Hemolymph moves from the heart into the tissues and cavities and then drains back into the main cavity.

d. Blood moves from the heart into arteries and into smaller vessels and then back into larger vessels as it makes its way back to the heart.

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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