What is the shell actually made up of?
What will be an ideal response?
Answer: many separate bones, which are joined together by structures
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One function of HCl secreted in the stomach is to convert pepsinogen into the active enzyme pepsin. Why don't stomach cells simply secrete pepsin instead?
A. Adequate amounts of pepsin are already manufactured by the pancreas. B. Only the pepsinogen version is able to stabilize fat-water emulsions. C. Pepsin is denatured and rendered inactive in solutions with low pH. D. If cells produced active pepsin, they would digest their own cellular proteins.
Which of the following might a genetic counselor do as part of her job?
A) Order prenatal tests, interpret the results, and then deliver the baby B) Order a lipid profile, interpret the results, then prescribe a statin drug if cholesterol levels are unhealthy C) Require a patient to take a test for hereditary colon cancer D) Explain the inheritance of a specific disorder in a family, evaluate risks for relatives, and advise on genetic testing
Answer the following statements true (T) or false (F)
1. If a woman in her late forties wants to have a baby and seeks medical advice, she would most likely be advised of the risks related to nondisjunction occurring and a higher rate of fetal chromosomal abnormality. 2. Identical twins result from one zygote splitting into two genetically identical embryos. 3. Without genetic diversity, a population might more easily fall victim to parasites and pathogens. 4. Caenorhabditis elegans is a hermaphrodite, which means it only undergoes sexual reproduction. 5. In animals, each gamete arises from a diploid cell containing two sets of homologous chromosomes.
Blood glucose levels are regulated by
a. insulin. b. glucagon. c. cortisol. d. insulin and glucagon only. e. insulin, glucagon, and cortisol.