The ________ is connected to the GI tract and has no digestive function, but it may have a role in the defense of the body against disease. It occasionally becomes inflamed and requires removal
Fill in the blank(s) with correct word
appendix
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Which structure prevents blood flowing back into the atria during ventricular contractions?
A. semilunar valves B. atrioventricular valves C. sinoatrial node D. carotid blood shunts E. foramen ovale
Which sentence characterizes cancer cells?
a. Tumours formed by cancer cells remain encapsulated and grow in only one location. b. Cancer cells form tumours that strongly adhere to surrounding tissues. c. Cancer cells display uncontrolled cell division. d. Mitosis is strictly regulated in cancer cells.
In plants, most differentiated cells retain
A) only a tiny fraction of their original set of genes. B) a complete set of their genes but lose the ability to express most of those genes. C) a complete set of their genes and retain the ability to express those genes under certain circumstances. D) the ability to dedifferentiate but then cannot return to their original differentiated state.
The lipopolysaccharides are associated with the ____ membrane of Gram- ____ bacteria
a. outer; positive
b. outer; negative c. plasma; positive d. plasma; negative e. plasma; positive and negative