In the adult, red blood cells are produced in areas of the ________.
Fill in the blank(s) with the appropriate word(s).
red bone marrow
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________ is the mechanism used to protect the glomerulus from minor changes in blood pressure.
A. Filtration B. Saturation C. Autoregulation D. Selection
Synovial fluid
A. lines the joint everywhere except over the articular cartilage. B. is a double layer of tissue that encloses a joint. C. provides a smooth surface where bones meet. D. is a thin lubricating film covering the surface of a joint. E. is a layer of tissue that is continuous with the periosteum.
X, Y, and Z are adjacent sensory receptors in the skin. During administration of the flu shot, a needle is inserted in the middle of Y's receptive field. All three receptors are activated. Which of the following is likely to be true?
A. The receptor potential in neurons X and Z will be more depolarized than in neuron Y. B. It won't be possible to discriminate which neuron's receptive field was stimulated at its center. C. The frequency of action potentials in the afferent pathway from neuron Y will be increased by excitatory interneurons projecting from the afferent pathways from neurons X and Z. D. The receptor potentials in all three neurons will achieve the same, average value. E. The frequency of action potentials in neuron Y will be greater than that in neurons X and Z.
Which of the following is true of the dura mater?
A) The outer (endosteal) layer is fused to the periosteum of the cranial bones. B) It consists of three layers around the brain only. C) It contains the subarachnoid spaces. D) It follows precisely and adheres closely to the contours of the brain tissue. E) None of the answers are correct.