what does failure of tolerance result in?
What will be an ideal response?
autoimmunity (immunological reaction to self)
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If the apical ectodermal ridge is surgically removed from an embryo, it will lose _____
A) positional information for limb-bud pattern formation B) guidance signals needed for correct gastrulation C) unequal cytokinesis of blastomeres D) the developmental substrate for the kidneys
T cell receptors on a particular T cell can recognize more than two antigens
Indicate whether the statement is true or false.
It is the morning of a big test. You are very
nervous about it. Your heart is racing and your blood pressure is increased. You are feeling the effects of the ___ division of the ___ nervous system.
a. parasympathetic--autonomic b. parasympathetic--somatic c. sympathethic--autonomic d. sympathetic--somatic e. autonomic--somatic
The dorsal surface of a rabbit corresponds to the
__________ of a human. a. anterior b. posterior c. inferior d. superior e. ventral