A bundle of nerve fibers is surrounded by a layer of fibrous connective tissue called the
A. perineurium.
B. neurilemma.
C. endoneurium.
D. fascicle.
E. epineurium.
Answer: A
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What is the correct relationship between graded potentials and action potentials?
A) Graded potentials are used to generate action potentials. B) Action potentials are used to generate graded potentials. C) Graded potentials and action potentials are two terms for the same phenomenon. D) All graded potentials increase the likelihood of an action potential.
The test in which the percentages of various types of leukocytes in a blood sample is determined is the ________ white blood cell count.
Fill in the blank(s) with the appropriate word(s).
Which of the following does not contribute to venous return?
A. Contraction of skeletal muscles of the limbs B. The expansion and contraction of the thoracic cavity during ventilation C. The suction created by the atria slightly expanding during ventricular systole D. The difference of pressure between venules and the venae cavae E. Widespread vasodilation
Most primates are ________, meaning they live in trees
A) bipedal B) prehensile C) troglodytic D) arboreal E) cursorial