In which location would the partial pressure of oxygen be the lowest?
a. inhaled air
b. exhaled air
c. alveoli
d. pulmonary veins
e. pulmonary arteries
ANSWER: e
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The protostome developmental sequence arose just once in evolutionary history, resulting in two main subgroups—Lophotrochozoa and Ecdysozoa. What does this finding suggest?
A) These two subgroups have a common ancestor that was a deuterostome. B) The protostomes are a polyphyletic group. C) Division of these two groups occurred after the protostome developmental sequence appeared. D) The lophotrochozoans are monophyletic.
The causative organisms for CAP and HCAP differ, but the modes of transmission do not; that are all transmitted via aerosolized droplets which enter the lungs.
Answer the following statement true (T) or false (F)
Proteins that span both layers of the nuclear envelope function as
a. receptors. b. transporters. c. pores. d. both receptors and pores. e. receptors, transporters, and pores.
All zygotes are
a. multicellular. b. diploid. c. animals. d. clones. e. gametes.