Merkel's disks are used by the visually impaired for reading Braille. One quality of the receptor that allows this is
A) A phasic firing.
B) Small receptive field.
C) A special sensitivity to deep pressure on the skin.
D) A large dendritic tree.
Answer: B
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Second-order neurons synapse with third-order neurons in the ________.
A. dorsal root ganglion B. spinal cord C. cerebral cortex D. medulla oblongata E. thalamus
A hypothalamic tumor that secretes large amounts of somatostatin may cause dwarfism in a young child
Indicate whether the statement is true or false.
While you study blood vessel structure in your dorm room, your roommate prepares to bike to his favorite fishing hole. You absent-mindedly watch as he puts on his bike shorts, which look absurdly small in his hands but stretch easily then snap back to fit tightly. His fishing shirt is a nonstretchy cotton weave that fits loosely, with open mesh panels across the back and armpits for ventilation.
Considering only the basic structural differences in arteries, veins, and capillaries, which of the types of fabrics resemble which vessels, and why? What will be an ideal response?
Which of the following structures are found in the middle ear?
What will be an ideal response?