The primary risk factor for cancer is ____________________. Fill in the blank(s) with the appropriate word(s)
ANS: age
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In general, a signal transmitted via phosphorylation of a series of proteins _____
A) results in a conformational change to each protein B) requires binding of a hormone to an intracellular receptor C) activates a transcription event D) generates ATP in the process of signal transduction E) occurs within the outer plasma membrane
The large intestine is the longest part of the digestive tract
Indicate whether the statement is true or false
Answer the following statements true (T) or false (F)
1.A transfusion can provide passive immunity. 2.If an Rh- woman has two babies who are Rh+, her immune response to the second baby would be an example of a secondary immune response. 3.T cells direct humoral immunity while B cells govern cell-mediated immune reactions. 4.Lymph nodes have a crucial role in immunity. 5.Adaptive immune defenses provide a rapid, broad defense against any infectious agent.
The function of the rugae of the stomach is to:
a. secrete amylase. b. crush the food. c. increase the holding capacity of the stomach. d. mix the food with gastric juices. e. increase the surface area for secretion.