During respiratory exchange, carbon dioxide moves from the blood into the alveoli due to:
a. the presence of a permease, which removes carbon dioxide from the capillaries.
b. potassium cotransport.
c. diffusion down a concentration gradient.
d. the air pressure of dissolved oxygen, which forces it out.
e. the contraction of the diaphragm, which creates a vacuum that pulls it out.
c
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The ________ is the minimum energy required before two molecules can be successful in producing a reaction.
Fill in the blank(s) with the appropriate word(s).
The majority of crustaceans live in ____
a. bodies of freshwater b. tropical rain forests c. marine habitats d. Wetlands e. Grasslands
In the model for quiet breathing, expiration is induced by
A) activation of expiratory neurons in the ventral respiratory center. B) abrupt termination of inspiration. C) activation of inspiratory neurons in the ventral respiratory center. D) activation of expiratory neurons in the dorsal respiratory center. E) activation of inspiratory neurons in the dorsal respiratory center.
If a viral host cell has a mutation that interferes with the addition of carbohydrates to proteins in the Golgi, which of the following could likely result?
A) The viral envelope proteins would not be glycosylated and might not arrive at the host plasma membrane. B) The viral capsid proteins would not be glycosylated and might not arrive at the host plasma membrane. C) The viral core proteins would not be glycosylated and might not arrive at the host plasma membrane. D) The virus would be unable to reproduce within the host cell.