Which number indicates the lunula?
A. 1
B. 2
C. 3
D. 4
E. 5
Answer: C
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Which events occur during the recycling of aged or damaged erythrocytes? (Order is not important.)
a: The heme group is converted into biliverdin. b: Bilirubin is placed in long-term storage in the liver. c: The iron ions in hemoglobin are removed. d: The iron ions are stored in the liver. e: The iron ions are stored in the red bone marrow. f: Membrane proteins and globin proteins are broken down and reused. g: The erythrocyte contents, excluding the globins, are excreted unchanged via the digestive tract. A. a, b, c, e, f B. a, c, d, f C. a, b, c, g D. c, d, g E. c, e, g
What type of neuron, found within the CNS, performs the job of information processing?
A) bipolar neurons B) interneurons (association neurons) C) motor (efferent) neurons D) sensory (afferent) neurons
Jacinda tore her Achilles (calcaneal) tendon during a recent track meet. She has injured ________
A) muscle tissue B) loose connective tissue C) epithelial tissue D) dense connective tissue E) nervous tissue
Which of the following statements concerning the properties of action potentials is TRUE?
A. The rate of propagation of an action potential down an axon is independent of stimulus strength. B. Action potentials can undergo summation. C. A supra-threshold stimulus can stimulate an action potential during the absolute refractory period. D. Action potentials generally propagate from the axon terminal toward the initial segment. E. Increasing the size of a stimulus will increase the amplitude of an action potential.