The cholera toxin causes a(n) __________ of chloride channels in cells of the intestine and the
resulting __________.
a. closing; loss of blood
b. closing; movement of neutrophils toward the bacterium
c. opening; assembly of microtubules
d. opening; gain of water
e. opening; loss of water
E
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Taste buds are ____
a. really just modified sensilla b. found only on the tongue in humans c. collections of papilla that respond to different stimuli d. small capsules of cells, each with a pore at the top though which sensory hairs project and interact with environmental molecules e. able to respond to all flavors simultaneously through sensory hairs that connect to papillae
In order for competition to take place, what must be true?
1.There has to be two different species involved. 2.The resource must be limited. 3.The individual must have partitioned the resource. 4.The species must have a specialized niche.
The female reproductive system includes all
EXCEPT which of the following? a. clitoris b. vagina c. oviduct d. ovary e. mammary gland
Which of the following statements best describes the benefits of radiation therapy?
A. Radiation therapy can be combined with other therapies, including chemotherapy. B. Radiation therapy can be directed against specific cells and tissues within the body. C. Radiation damages the DNA within cancer cells, either slowing down cell division or stopping it altogether. D. Radiation therapy may shrink tumors, making them easier to remove surgically. E. All of the choices are correct.