The oil of our scalp is secreted by ______ glands associated with the hair follicles.
ceruminous
sebaceous
apocrine sweat
mammary
merocrine sweat
The Correct Answer is B
A. ceruminous: Ceruminous glands are modified sweat glands located in the ear canal that produce earwax (cerumen), not scalp oil.
B. sebaceous: Sebaceous glands are associated with hair follicles and secrete sebum, an oily substance that lubricates the hair and skin, helping to maintain moisture and provide a protective barrier.
C. apocrine sweat: Apocrine sweat glands are found in specific areas such as the axillae and groin. They secrete a thicker, milky sweat, usually in response to stress or hormonal signals, and do not produce scalp oil.
D. mammary: Mammary glands are specialized sweat glands that produce milk. They are not involved in producing scalp oil.
E. merocrine sweat: Merocrine (eccrine) sweat glands are widely distributed and secrete a watery sweat primarily for thermoregulation, not for lubricating hair or skin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. gluconeogenesis, citric acid cycle, lipolysis:Gluconeogenesis is the synthesis of glucose from non-carbohydrate sources, and lipolysis is the breakdown of fats. Neither represents the complete oxidation of glucose for energy production.
B. glycogenesis, lipogenesis, oxidative phosphorylation of the electron transport chain:Glycogenesis and lipogenesis involve the storage of glucose and fat, respectively, rather than its breakdown for ATP production.
C. glycolysis, citric acid cycle, oxidative phosphorylation of the electron transport chain:Glycolysis breaks glucose into pyruvate in the cytoplasm. The citric acid cycle oxidizes acetyl CoA derived from pyruvate, producing NADH and FADH₂. These coenzymes then donate electrons in the electron transport chain for oxidative phosphorylation, generating ATP, completing glucose oxidation.
D. lipolysis, glycogenolysis, beta oxidation:These processes involve the breakdown of fats and glycogen, not the full oxidation of glucose, so they do not represent the standard cellular respiration pathway.
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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