Based on Berthold's methods, how do researchers today determine a tissue to be endocrine in nature? What will be an ideal response?
Concepts to Consider: They first remove the tissue and replace it by transplanting similar
tissue from another animal. The changes caused by removing the tissue should be reversed
when it is replaced. Also, the suspected compound from the endocrine tissue of one animal is
injected into another animal that had that tissue previously removed. Replacement of the
suspected hormone should relieve deficiency symptoms. The chemical structure of the
compound is then determined, synthesized in a laboratory, and injected into experimental
animals. If the effects are what were predicted, scientists have enough data to support their
hypotheses.
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When measuring blood pressure, the Korotkoff sounds are heard
a. below the diastolic pressure. b. above systolic pressure. c. between the diastolic and systolic pressures. d. at none of the above times.
The winds formed between the equator and about 30 degrees of latitude, blowing from the northeast in the Northern Hemisphere and southeast in the Southern Hemisphere, are referred to as ________
Fill in the blank(s) with correct word
Which disorder is associated with buildup of amyloid proteins leading to loss of memory and intellectual functions?
a. epilepsy b. Parkinson’s disease c. Alzheimer’s disease d. meningitis e. multiple sclerosis
How do the numbers of chromosomes differ for organisms?
A) Among all known living creatures, humans have the most chromosomes. B) Animals have more chromosomes than plants. C) Eukaryotes have more chromosomes than prokaryotes. D) Prokaryotes have more chromosomes than fungi.