What are the tiny white cords that anchor the cusps or flaps of endocardium to the walls of the ventricles?
A) chordae tendineae
B) ligamentum arteriosum
C) ductus venosus
D) myocardium
A
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The skull consists of _____ cranial bones and _____ facial bones
A. 8, 14 B. 7, 12 C. 10, 12 D. 5, 7 E. 9, 11
What is happening in the heart between the QRS and T waves?
A. Ventricular repolarization B. Atrial systole C. Ventricular diastole D. Atrial repolarization E. Ventricular systole
Which areas of an antigen are recognized by lymphocytes so that the cells can respond?
A. Antigenic determinants B. Epitopes C. Both "Antigenic determinants" and "Epitopes" are correct. D. T-cell receptors E. Major histocompatibility complexes
Tina falls while climbing a tree and lands on her back. Her frightened parents take her to the emergency room, where she is examined. Her knee-jerk reflex is normal and she exhibits a plantar reflex (negative Babinski reflex). These results suggest that
A) Tina has injured one of her descending nerve tracts. B) Tina has injured one of her ascending nerve tracts. C) Tina has a spinal injury in the lumbar region. D) Tina has a spinal injury in the cervical region. E) Tina suffered no damage to her spinal cord.