The first antibody class to be released into the bloodstream during an immune response is ________.
A. IgA
B. IgD
C. IgG
D. IgM
Ans: D. IgM
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Which of the following is not a way that red blood cell shape is significant?
A) It gives the red blood cell a large surface area to volume ratio. B) It allows fast exchange of gases between the inside of the cell and the plasma. C) It enables red blood cells to form stacks. D) It allows red blood cells to bend and flex. E) It enables red blood cells to phagocytose bacteria.
Which statement about nervous systems is NOT true?
a. The arthropod nervous system has ganglia that lie within the central nervous system. b. Arthropods have a solid and dorsal nerve cord c. The nerve cord of vertebrates has a segmental branching pattern. d. In vertebrates, interneurons are only found in the central nervous systems.. e. In vertebrates only two neurotransmitters control the effector organ responses regulated by efferent neuronal terminals.
Identify the renal pelvis in the following figure
A) A B) B C) C D) D
The stage of a muscle twitch that occurs from the point of stimulation to the beginning of contraction is called the ________ period.
A. contraction B. lag C. latent D. refractory