Which of the following does not apply to macrophages? Macrophages
a. participate in inflammation.
b. process and present antigen to lymphocytes.
c. secrete antibodies.
d. secrete interleukin 1.
e. participate in immune surveillance against cancer.
C
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Write the chemical equation for this reaction. Determine average values for each beaker. Explain how the reaction times differed. What may be present in beaker B that is absent from beaker A?
Carbon dioxide and water readily combine to form carbonic acid. The change in pH as the acid dissociates can be demonstrated with an indicator dye that changes color at a particular pH. In your physiology lab, you perform this experiment in two beakers containing room-temperature water and indicator, labeled as A and B. CO2 is bubbled into solutions A and B from a pressurized tank for 10 seconds. A stopwatch was used to measure how long it took for the solutions to change color. The data below were generated by the students.
Explain the use of the terms fight and flight in describing sympathetic motor responses. How does sympathetic activity explain your increased "jumpiness" when you are home alone at night, watching a horror movie on TV?
What will be an ideal response?
The deltoid is innervated by the ________ nerve.
Fill in the blank(s) with the appropriate word(s).
The component of the plasma membrane that acts as a selective barrier to diffusion of polar molecules is the integral proteins.
Answer the following statement true (T) or false (F)