The umbilical cord functions to
(a) carry waste products in the blood from the fetus to the mother.
(b) carry waste products in the blood from the mother to the fetus.
(c) carry oxygen in the blood from the mother to the fetus.
(d) do both a and c.
(c) carry oxygen in the blood from the mother to the fetus.
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Match the following items with the correct phrases.
_______1. Immune complex reactions; antigen-antibody complexes become deposited in tissue (e.g., the glomeruli of the kidneys), resulting in inflammatory damage. _______2. Anaphylactic reactions; examples include hayfever symptoms, hives, asthma, and the anaphylactic shock that could follow a bee sting or administration of penicillin. _______3. Cell-mediated reactions; antibodies don't play a major role. _______4. Cytotoxic reactions; involve the lysis of cells; the adverse reactions that follow incompatible blood transfusions are an example. a. type I hypersensitivity reactions b. type II hypersensitivity reactions c. type III hypersensitivity reactions d. type IV hypersensitivity reactions
Cats cannot synthesize the amino acid taurine. This means that in cats, taurine
A. is not a required nutrient. B. is an essential amino acid. C. must be stored in cellular compartments. D. is not present in their normal diet.
A newly described fungus has been isolated from the lungs of several patients experiencing symptoms of pneumonia. All of these patients have a preexisting immunocompromising condition, including four patients with AIDS and two who have been recipients of organ transplants. The natural habitat of this fungal species is the soil.This fungal disease would most likely be classified as a (an) ________ mycosis.
A. cutaneous B. opportunistic C. subcutaneous D. systemic E. superficial
Homologous chromosomes undergo synapsis during:a
anaphase I. b. prophase I. c. anaphase II. d. telophase II. e. prophase II