Which of the following regarding Candida albicans is incorrect?
A) Candida albicans is a budding yeast that forms psuedohyphae when it invades tissue
B) Candida albicans causes thrush
C) Candida albicans is transmitted primarily by respiratory aerosol
D) Impaired immunity is an important factor for the disease
Ans: C) Candida albicans is transmitted primarily by respiratory aerosol
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Which organism is considered part of the nekton?
a. frigate bird b. penguin c. cormorant d. snowy plover e. albatross
The neuron transport proteins that maintain the
resting membrane potential and restore ion gradients following an action potential are a. sodium-phosphorus passive transporters. b. sodium-potassium pumps. c. sodium-chlorine gated channels. d. phosphorus-calcium pumps. e. phosphorus-chlorine gated channels.
Antigen receptors on B lymphocytes (antibodies) consist of
A) Two identical light chain and two dissimilar heavy chains. B) One heavy chain and a pair of dissimilar light chains. C) One heavy chain and a pair of identical light chains. D) Two identical light chains and two identical heavy chains.
Chemotherapy often produces hair loss and nausea. What aspect of the treatment impacts these normal nontarget tissues?
a. The cells that form the hair follicle and line the digestive system have receptors similar to those found on tumor cells and bind the chemotheraputic agents just as the tumor cells do. b. All body cells take up the chemotherapeutic drugs but the cells that need to go through the cell cycle repeatedly, like hair cells and tumor cells, are inhibited from doing so. c. Cells that are damaged by chemotherapy are nonmutated versions of the tumor cells; both the normal and tumor cells retain their sensitivities to the chemotherapy and are equally affected. d. Oncologists have no satisfactory explanation for the observation, but are working aggressively to minimize these and other unintended effects.