Which condition is characterized by cyanosis and pain in the fingers due to extreme vasoconstriction in the digits resulting from excessive sympathetic stimulation?
A. Horner syndrome
B. Raynaud disease
C. Orthostatic hypertension
D. Addison disease
E. Mass reflex reaction
B. Raynaud disease
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Until recently, acquired immunity was thought to only occur in jawed vertebrates. Which of the following observations suggest that this is NOT the case?
a. Phenoloxidase activity enables hemocytes to form an impermeable wall of melanin around an infecting pathogen. b. Invertebrate immune cells secrete an IL-1 like compound. c. Invertebrates produce lectins, which coat bacterial cells, priming them for phagocytosis. d. Copepods become resistant to tapeworms after an initial exposure. e. None of these.
Vibrations in the stapes directly induce vibrations in the ________.
A. tympanic membrane B. round window C. oval window D. incus
The T wave on an ECG tracing represents
A) atrial depolarization. B) atrial repolarization. C) ventricular depolarization. D) ventricular repolarization. E) ventricular contraction.
Muscles with fibers that run at an angle to the long axis of the body are called
A) lateralis. B) transversus. C) rectus. D) oblique. E) medialis.