Helper T (TH) cells recognize antigens when they are bound to a(n) ________.
A. hapten
B. major histocompatibility complex (MHC) protein
C. basophil
D. natural killer cell
E. immunoglobulin
Answer: B
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Kassie is allergic to bee stings. During a play date at the park, she gets stung and goes into anaphylactic shock while she's playing with her friends. Which of the following is a by-product of Kassie's anaphylaxis?
A) understimulation of basophils B) the production of histamines stops C) overstimulation of mast cells D) high blood pressure
The sodium-potassium pump moves both potassium and sodium down their concentration gradients, from higher to lower concentration
Indicate whether this statement is true or false.
The inner ear consists of three spaces, which are the:
a. perilymph, vestibule, and the cochlea b. endolymph, vestibule, and the cochlea c. vestibule, semicircular canals, and the cochlea d. vestibule, semicircular canals, and the endolymph
In contrast to secondary spinal cord injury, primary spinal cord injury occurs:
A) from progressive swelling. B) at the moment of impact. C) from penetrating mechanisms. D) within 24 hours of the injury.