Based on rat studies that show how maternal nurturing helps offspring respond better to stress propose a model to help explain why human children who are abused have a higher suicide rate
What will be an ideal response?
From rat studies, it could be proposed that human children that are abused will have decreased histone acetylation and increased DNA methylation associated with the genes for glucocorticoid receptors. These receptors in the hypothalamic region of the brain are important in mediating stress.
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Select the immunoglobin (Ig) classes that is correctly matched to their facts. Check all that apply.
_____ IgA—found in saliva, tears, the GI tract, and mother's milk _____ IgD—serve as receptors on the surfaces of T cells _____ IgE—promotes the release of histamine from mast cells and basophils, causing allergy symptoms _____ IgG—a minor form of immunoglobulin, used only in response to parasitic worms _____ IgM—first secreted during primary response, promotes agglutination, activates complement
All of the following are problems that growth causes for cells EXCEPT
A) more demands on DNA. B) excess oxygen. C) obtaining enough food. D) expelling wastes.
Which type of vascular tissue conducts carbohydrates?
A. sclereids B. collenchyma cells C. xylem D. phloem E. fibers
__________ a series of enzyme-catalyzed chemical reactions of central importance in all living cells that harvests the energy in carbon-carbon bonds of sugar molecules to generate ATP; the citric acid is an aerobic metabolic pathway because it requires oxygen in later reactions to proceed
Fill in the blank(s) with the appropriate word.