A child is born with a congenital disease that results in total loss of B cells. Which of the following would be a consequence of this immunodeficiency?
A. no lymphokine production
B. lack of antibody formation
C. nonfunctioning complement system
D. inability to form any type of memory cell
E. no antigens on the cells
B
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Undifferentiated spermatogenic cells are called
A. spermatids. B. primary spermatocytes. C. spermatogonia. D. secondary spermatocytes.
The barrier between the plasma and interstitial fluid
a. is the blood vessel walls b. is the plasma membrane c. transports materials between these two fluid compartments by both passive and active means d. is both a and b e. is all of the above
Describe how light is refracted and focused on the retina in an emmetropic eye
What will be an ideal response?
Match the structure of the eye with the appropriate description.A. Photoreceptor cells that function in black and white visionB. Photoreceptor cells that function in color visionC. The opening in the irisD. The innermost tunic of the eyeE. A pigmented contractile structurePupil
Fill in the blank(s) with the appropriate word(s).