Select the correct statement about the function of antibodies.
A) Antibodies may directly destroy "invaders."
B) Neutralization is the process by which antibodies cause invading cells to clump together.
C) Complement fixation is the main mechanism by which antibodies provide protection.
D) The most potent agglutinating agent is IgG.
C) Complement fixation is the main mechanism by which antibodies provide protection.
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With the type of lever system exemplified by flexion of the elbow joint when an object is held in the hand, the
a. power arm of the lever is the distance between the elbow joint and the insertion of the biceps muscle. b. load arm of the lever is the distance between the elbow joint and the hand. c. velocity and distance moved by the hand is amplified at the expense of the biceps muscle having to exert considerably greater force than the actual load that is moved. d. two of these answers. e. all of these answers.
Which statement regarding the storage of your pig is the most correct?
A) The pig should be dried and then stored in a sealed bag. B) The pig should be stored in a sealed bag covered in distilled water. C) The pig should be stored in a sealed bag with exposed muscles covered with paper towels that have been dampened with fixative. D) The pig should be stored on the dissecting pan without any coverings.
Without oxygen, brain damage will occur within _____.?
A) ?2 to 3 minutes B) ?4 to 8 minutes C) ?10 to 15 minutes D) ?25 to 30 minutes
Compare the types of cells that lymphoid stem cells and myeloid stem cells produce
A) Lymphoid stem cells give rise to lymphocytes. Myeloid stem cells give rise to all the formed elements except lymphocytes. B) Lymphoid stem cells give rise to all the formed elements except lymphocytes. Myeloid stem cells give rise to lymphocytes. C) Lymphoid stem cells give rise to all of the white blood cells. Myeloid stem cells give rise to the red blood cells and platelets. D) Lymphoid stem cells give rise to all of the white blood cells and platelets. Myeloid stem cells give rise to the red blood cells. E) Lymphoid stem cells give rise to the white blood cells and the red blood cells. Myeloid stem cells give rise to the platelets.