The nucleotide sequence within the genes that produce B cell receptor and antibodies are reshuffled by a process called somatic recombination. This produces the huge variability in antibody types
Indicate whether the statement is true or false
TRUE
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The function of the postcapillary venule is to
A. supply metarteriole with blood. B. drain the capillary bed. C. allow for diffusion of nutrients to the tissues. D. allow for diffusion of nutrients and metabolic wastes. E. allow for diffusion of metabolic wastes from the tissues.
Of the list below select the one that gives the least explanation for the relatively high mobility of the arms
A) The relatively open glenoid cavity of the glenohumeral joint. B) The scapula does not articulate to the axial skeleton directly. C) The subscapular notch is a passage way for nerves. D) The clavicle articulates to the axial skeleton at only the sternal end.
Every substance that enters or leaves the internal environment of the body must cross an epithelium.
A) True B) False
Which of the following is not an adaptation for keeping the testes cool?
A. The dartos muscle B. Pampiniform plexus C. The testicular artery D. Cremaster muscle E. Descent of the testes to the scrotum