Describe the process of dark adaptation
What will be an ideal response?
The eyes' sensitivity to light depends on the amount of light responsive photopigment present in the rods and cones. When you go from bright sunlight into darkened surroundings, you cannot see anything at first, but gradually you begin to distinguish objects as a result of the process of dark adaptation. Breakdown of photopigments during exposure to sunlight tremendously decreases photoreceptor sensitivity. In the dark, the photopigments broken down during light exposure are gradually regenerated. As a result, the sensitivity of your eyes gradually increases so that you begin to see in the darkened surroundings. However, only the highly sensitive, rejuvenated rods are "turned on" by the dim light.
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Indicate whether the statement is true or false
By what mechanism would an increase in venous return increase stroke volume?
What will be an ideal response?
The bones of the wrist collectively are called the ________.
Fill in the blank(s) with the appropriate word(s).
The ________ is the only joint between the axial and appendicular portions of the skeleton.
Fill in the blank(s) with the appropriate word(s).