Anaphylactic shock is caused by
a. an overproduction of antihistamine.
b. an overproduction of histamines and
cytokines.
c. an allergen that escapes detection by the
immune system.
d. all of these.
e. none of these
B
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________ is the total energy change that accompanies a chemical reaction.
A. Synergy B. Enthalpy C. Free energy D. Entropy
The accessory organs for the mammalian digestive system include all of the following except the:
1.salivary glands 2.adrenal medulla 3.liver 4.gallbladder
Which of the following statements about a root cap is false?
a. It protects the delicate root apical meristem b. It secretes lubricating polysaccharides c. It orients the root that it grows downward d. It loses cells during root growth. e. It absorbs nutrients
Indicate which of the following is true with regard to recessive alleles. (Select all that apply)
a. Their expression is masked int he presence of a dominant allele. b. They are expressed only when present on both of the homologous chromosome. c. They are more frequently observed in males than females. d. They are more frequently expressed than other traits. e. They mask the expression of other alleles.