Steroid hormones and thyroid hormone are which of the following?
a) amphiphilic
b) hydrophobic
c) hydrophilic
Ans: b) hydrophobic
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The liver only secretes bile between meals
Indicate whether the statement is true or false
Differentiate between simple inheritance and polygenic inheritance
A) In simple inheritance, phenotype is determined by a single locus. In polygenic inheritance, phenotype is determined by multiple loci. B) In simple inheritance, phenotype is determined by multiple loci. In polygenic inheritance, phenotype is determined by a single locus. C) In simple inheritance, phenotype is determined by only one parent. In polygenic inheritance, phenotype is determined by both parents. D) In simple inheritance, phenotype is determined by interactions among alleles of several different genes. In polygenic inheritance, phenotype is determined by interactions between a single pair of alleles. E) In simple inheritance, phenotype is determined by interactions between a single pair of alleles. In polygenic inheritance, phenotype is determined by interactions among alleles of several different genes.
Cytotoxic T-lymphocytes destroy infected cells by
A. increasing the permeability of infected cells and preventing apoptosis. B. decreasing the permeability of infected cells and preventing apoptosis. C. increasing the permeability of infected cells and inducing apoptosis. D. decreasing the permeability of infected cells and inducing apoptosis.
A follicle containing a secondary oocyte and a single fluid-filled antrum is called a _____ follicle
A. primary B. Graafian or mature C. secondary D. primordial E. tertiary