In addition to the partial pressure gradient, the other major factor that determines the rate of diffusion of gases in the

lungs is ____.
a. the alveoli membrane surface area
b. electrical gradients
c. the thickness of the alveolar membrane
d. the size of the gas molecules
e. the hemoglobin concentration


ANSWER: a

Biology & Microbiology

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The largest fraction of saltwater is that which is frozen at the Earth's polar regions.

Answer the following statement true (T) or false (F)

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If nautiloids only inhabit the last chamber, what are the other chambers used for?

a. Egg storage b. Food storage c. Maintaining hypertonic seawater d. Maintaining buoyancy with gases

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An organ is defined as ____

a. one or more cell types that perform specific functions b. a tissue that is unique is its function c. various tissues that perform different functions d. two or more tissues organized and capable of carrying out a specific task e. two or more tissues co-localized to one part of the body

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Four of the five events listed below are related to

pairing of chromosomes. Select the exception. a. pairing of homologues b. crossing over c. exchange of genes d. tight aligning of homologues e. segregation of chromosomes during anaphase I

Biology & Microbiology