Which of the following describes the retina?
is the colored part of the eye
Located in the posterior cavity
is the outermost layer of the eye
Produces aqueous humor
The Correct Answer is B
a: Is the colored part of the eye - This describes the iris, which is the colored part of the eye that regulates the size of the pupil.
b. Located in the posterior cavity: The retina is a layer of tissue located in the posterior cavity of the eye. It contains photoreceptor cells that convert light into neural signals, which are then transmitted to the brain via the optic nerve.
c: Is the outermost layer of the eye - The outermost layer of the eye is the sclera, a tough, white layer that helps maintain the shape of the eye.
d: Produces aqueous humor - Aqueous humor is produced by the ciliary body and is found in the anterior chamber of the eye, not in the retina.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
a: Storage of fat - While the skin does contain adipose tissue (fat), its primary function is not fat storage.
b. Body temperature regulation-The skin plays a crucial role in regulating body temperature through processes such as sweating to cool the body down and constriction of blood vessels to conserve heat.
c: Energy production - The skin is not directly involved in energy production; this is primarily carried out by organs like the liver and muscles.
d: Gas exchange - Gas exchange occurs primarily in the lungs, not the skin.
Correct Answer is C
Explanation
a: Chest cavity compresses the lungs - This is incorrect; during inspiration, the chest cavity expands, not compresses.
b: Length of the thoracic cavity decreases - This is incorrect; during inspiration, the thoracic cavity increases in length as it expands.
c. Diameter of the thoracic cavity increases. When inspiratory muscles contract, such as the diaphragm and external intercostal muscles, the thoracic cavity expands, increasing its volume. This expansion decreases the pressure within the lungs, causing air to flow in (inspiration).
d: Diaphragm rises up in the abdomen - This is incorrect; during inspiration, the diaphragm contracts and moves downward, not upward.
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