Which of the following concerning Class I MHC proteins is false?
A) bind complement
B) allow the body to differentiate its own antigens from foreign antigens
C) function in antigen presentation
D) display abnormal peptides on the plasma membrane
E) are found on all nucleated cells
Answer: A
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The table lists characteristics of species of vertebrates that increase or decrease their potential for survival
Select a species of vertebrate that you think is likely to be at risk and another that is likely to be safe, and use the table to determine how well the characteristics of your species fit the categories. (Selecting species that are taxonomically similar--two mammals or two lizards, for example--simplifies the comparison.) At Risk Safe Large body size Small body size Carnivore Herbivore, scavenger, insectivore Narrow habitat tolerance Wide habitat tolerance Valued for a product—meat, fur, oil, etc. Not a source of a commercially valuable product Restricted geographic distribution Wide geographic distribution Intolerant of the presence of humans. Tolerant of the presence of humans Apex predator that bioaccumulates toxins from its prey Lower tropic level predator
Helper T cells are important only for cell-mediated immune responses.
Answer the following statement true (T) or false (F)
Which of the following is located in the posterior cranial fossa?
A. Foramen ovale B. External acoustic meatus C. Jugular foramen D. Foramen spinosum E. Foramen rotundum
Glycogen and starch are examples of a specific category of carbohydrates called ________
A) monosaccharides B) triglycerides C) steroids D) polysaccharides