Propose an argument for why the urinary system is much more than just a waste filtration site and is also a major player in the game of homeostasis
What will be an ideal response?
Although the nephrons of the kidneys do filter wastes from blood, many useful substances and a great deal of water also pass into them. Through reabsorption of these molecules, the kidneys can regulate which substances, and how much of them, should be retained. Regulated mostly by hormones, the kidneys will reabsorb as much or as little sodium and other ions as necessary to maintain homeostasis. Similarly, through the control of ADH from the hypothalamus/posterior pituitary, varying amounts of water can be reabsorbed according to the body's needs.
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Which of the statements best describes the mutational event pictured below?
Wild-type ACC CAC UCU GGA UUU AAG GCA thr his ser gly leu lys ala Mutant ACC CAC UCU UGA UUU AAG GCA thr his ser stop phe lys ala A. a transversion mutation leading to a nonsense codon B. a frameshift mutation leading to a missense amino acid substitution C. a transition mutation resulting in a silent amino acid substitution D. a transition mutation leading to a nonsense codon E. an insertion mutation resulting in a frameshift of the amino acid sequence
An example of an anabolic reaction is _________.
a. protein hydrolysis b. conversion of starch to glucose c. enzymes converting sucrose d. photosynthesis e. respiration
An organic nutrient that cannot be synthesized by the organism and must be provided is called a/an
What will be an ideal response?
Which is incorrect about food-borne illnesses?
A. The top viruses that cause food-borne illnesses are Norwalk and Hepatitis A viruses. B. Reports of food poisoning are decreasing in the United States. C. Avoiding cross contamination in the kitchen can reduce the risk of food poisoning. D. Most cases of food poisoning occur in the home and are not reported. E. Food infection is associated with ingesting whole microbial cells.