Which glands produce ear wax?
apocrine glands
eccrine glands
ceruminous glands
merocrine glands
The Correct Answer is C
A. apocrine glands: Apocrine glands are sweat glands found in regions like the axillae and groin. They secrete a thicker fluid that, when acted upon by skin bacteria, produces body odor. They are not responsible for earwax production.
B. eccrine glands: Eccrine glands are the most numerous sweat glands, found across much of the skin. They secrete a watery solution important for thermoregulation but do not contribute to earwax formation.
C. ceruminous glands: Ceruminous glands are specialized modified apocrine glands located in the external auditory canal. They produce cerumen, or earwax, which protects the ear canal by trapping debris and providing antimicrobial properties.
D. merocrine glands: Merocrine secretion refers to the method by which many glands, including eccrine sweat glands, release their products through exocytosis. These glands do not produce earwax and are mainly involved in sweat production.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. fibrocartilage CT:Fibrocartilage provides strong support and shock absorption in areas such as intervertebral discs and the pubic symphysis, but it is too rigid to maintain the flexible shape of the external ear.
B. elastic cartilage CT:Elastic cartilage contains a dense network of elastic fibers that provide both strength and flexibility. This allows the external ear (pinna) to maintain its shape while remaining pliable.
C. adipose tissue CT:Adipose tissue stores fat and cushions structures but does not provide the structural framework necessary to maintain the shape of the ear.
D. hyaline cartilage CT:Hyaline cartilage is found in structures such as the trachea and nose, providing support with limited flexibility. It is not elastic enough to preserve the shape of the external ear.
Correct Answer is A
Explanation
A. Pseudostratified columnar:Pseudostratified columnar epithelium appears multilayered due to nuclei positioned at different levels, but every cell contacts the basement membrane. This arrangement allows for functions such as secretion and movement of mucus, often aided by cilia in the respiratory tract.
B. Stratified cuboidal:Stratified cuboidal epithelium consists of two or more true layers of cuboidal cells, with only the basal layer in contact with the basement membrane. It provides protection and is typically found in ducts of glands.
C. Stratified columnar:Stratified columnar epithelium has multiple layers with only the deepest cells touching the basement membrane. It is rare and mainly found in parts of the pharynx, male urethra, and some glandular ducts.
D. Transitional:Transitional epithelium is specialized for stretching and recoiling, found in the urinary bladder. Cells change shape depending on tension, and not all layers contact the basement membrane.
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