Which feature permits the compression necessary to pump large volumes of blood out of the ventricles?
A. Absence of oxygenated blood in the atria
B. Presence of papillary muscles in the ventricles
C. Arrangement of cardiac muscle in the heart wall
D. Negative pressure inside the ventricles
E. Presence of skeletal muscle tissue in the heart skeleton
Answer: C
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Platelets are roughly the same size as erythrocytes, and like erythrocytes, they eject their nucleus just before entering circulation
Indicate whether this statement is true or false.
Astrocytes
a. induce formation of the blood-brain barrier. b. are important in the repair of brain injuries and in neural scar formation. c. take up excess K+ from the brain ECF. d. physically support neurons. e. all of these answers.
Which muscle forms the traditional "six-pack" of a well-toned abdominal wall?
A. Transversus abdominis B. External oblique C. Rectus abdominis D. Internal oblique E. Longissimus
Which source is the current standard of human anatomical names?
A. Eponymia Anatomica B. Nomina Anatomica C. Terminologia Anatomica D. Encyclopedia Anatomica