The cell walls of fungi are composed mainly of
a. cellulose.
b. lignin.
c. chitin.
d. pectin.
e. protein.
C
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The tissue antigens most involved in graft rejection involve
A. Rh. B. ABO. C. MHC. D. MLB.
An agriculturalist is very concerned because his wheat crop is suddenly covered with red streaks. When consulted, you identify the issue as a condition known as rust. What would you advise the agriculturalist is the best preventive strategy for addressing the cellular basis of the rust?
A. Rust is caused by fungi that give a reddish cast to soils in which they grow, which is taken up by the plant. Treat the soil to prevent the uptake of the rust-causing fungi. B. Rust is caused by fungi that have reddish spores that emerge from the leaves of infected plants. Treat the plant to eliminate the fungi that causes the rust. C. Rust is caused by fungi that have enzymes for breaking down plant structure. Treat the plant to make it resistant to the enzymes that are causing the rust. D. Rust is caused by rust-colored mushrooms produced as fruiting bodies. Treat the plant to eliminate the fruiting bodies that are recognized as rust.
What happens when thyroid hormone binds to cells of brown adipose tissue?
a. mitochondria of brown adipose tissue cells carry out reactions that produce heat b. a shivering response for heat production by skeletal muscle c. the body stores more energy as fat d. a decrease in metabolic rate
Chronic use of nonsteroidal anti-inflammatory drugs would MOST likely result in:
A) diverticulitis. B) esophageal varices. C) acute gastroenteritis. D) peptic ulcer disease.