Pemphigus vulgaris is an autoimmune disease in which the body attacks itself resulting in blistering skin. Which of the following are likely the target of this autoimmune attack causing this symptom?
A. Desmosomes between the epithelial cells
B. Gap junctions in the cardiac muscle
C. Tight junctions between the intestinal cells
D. Desmosomes in the cardiac muscle
Answer: A
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In the ascending limb of the nephron loop the ________
A) thick segment moves ions out into interstitial spaces for reabsorption B) thin segment is freely permeable to water C) thin segment is not permeable to sodium and chloride D) thick segment is permeable to water
Because the heart must work constantly, the cardiac muscles must ________.
A. contract less often than other muscles B. receive a generous blood supply C. be under constant voluntary control D. contain longer fibers than other muscles
In order for sound to reach the spiral organ (of Corti), the auditory ossicles must vibrate the oval window and set the endolymph in motion
Indicate whether the statement is true or false
Unlike Na+, K+ is secreted by the nephron tubules
Indicate whether the statement is true or false.