Answer the following statements true (T) or false (F)
1. Glucocorticoids (i.e., cortisol, prednisolone, dexamethasone) have a diverse number of functions. They include glucose mobilization during stress, development of lung tissue, and therapies to reduce inflammation.
2. Metamorphosis in flatfishes and in amphibians is controlled by growth hormone.
3. The nervous system integrates with the endocrine system to control hormone secretion.
4. The placenta develops from the endometrium while the fetus develops from embryonic tissue.
1. TRUE
2. FALSE
3. TRUE
4. FALSE
Shortly after implantation, newly developing embryonic tissues merge with the endometrium to form the placenta. The placenta, therefore, has a maternal portion and a fetal portion. The fetus itself does develop entirely from embryonic tissue.
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Where are the largest reserves of carbon on the planet?
A. soils B. frozen lakes C. rocks and fossil fuels D. fossil fuels E. the oceans
Without proofreading, the rate of errors in DNA replication in bacteria is as high as about one for
every ____ nucleotides assembled.
a. 10 to 100 b. 100,000 to 1,000,000 c. 1000 to 10,000 d. 10,000,000 to 100,000,000 e. 100,000,000 to 1,000,000,000
H. floresiensis fossils found on the Indonesian island of Flores have been dubbed “hobbits” by the media because of
what feature? a. They had small brains. b. They had large feet c. They were only 1 m tall. d. They had stone fireplaces. e. They were found to have lived in trees.
Refer to the accompanying figure. Which cell type or types are primarily responsible for the release of histamine in
injured tissues and in allergic responses? a. A only b. B only c. C only d. D only e. A and cell type D