If you enter a dimly lit room, will you be able to see clearly? Why or why not?
What will be an ideal response?
When you enter a dimly lit room, you are unlikely to be able to see at all. The low-intensity light in the room would be focused on the fovea centralis, which contains only cones, which cannot be stimulated by low-intensity light.
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The arachnoid mater
a. is the innermost meningeal layer b. a delicate, richly vascularized meningeal layer that is "cobwebby" in appearance c. a tough, non-elastic membrane that covers the central nervous system d. involved with the formation of CSF e. is characterized by a, b, and d
In which of the following areas would a periosteum be absent?
A, bone surface within joint cavities B. Surface of dermal bone C. Shafts of long bones D. Covering of hip bones
Which structures in the trachea prevent its collapse or overexpansion as pressures change in the respiratory system?
a. C-shaped tracheal cartilages b. S-shaped tracheal bones c. O-ringed tracheal cartilages d. irregular circular bones
What spinal cord injury is characterized by motor loss on the same side as the injury, but below the lesion?
A) Central cord syndrome B) Brown-Séquard syndrome C) Anterior cord syndrome D) Posterior cord syndrome