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 B
Explanation
A. collagen, elastin, and reticular fibers:These are the main types of fibers found in connective tissue, providing strength, elasticity, and support, but they do not represent all three main components.
B. ground substance, fibers, and cells:Connective tissue is composed of cells (such as fibroblasts, macrophages, and adipocytes), fibers (collagen, elastin, reticular), and ground substance (a gel-like material that fills the extracellular space). These three components work together to provide support, strength, and a medium for nutrient and waste exchange.
C. alveoli, fibrous capsule, and secretory cells:These structures are specific to glands or organs like the lungs, not general components of connective tissue.
D. fibroblasts, chondroblasts, and osteoblasts:These are specific types of connective tissue cells responsible for producing matrix in different connective tissues, but they do not account for fibers and ground substance, so they are not the three main components
Correct Answer is A
Explanation
A. intercalated discs:Intercalated discs connect cardiac muscle cells and contain desmosomes and gap junctions. Desmosomes provide mechanical strength to prevent cells from pulling apart during contractions, while gap junctions allow coordinated electrical signaling.
B. stroma:Stroma refers to the supportive connective tissue framework in organs. While it provides general support, it does not directly prevent cardiac muscle cells from separating during contraction.
C. myofilaments:Myofilaments, including actin and myosin, generate the contractile force in muscle cells. They are essential for contraction but do not provide structural adhesion between cells.
D. flana:Flana is not a recognized anatomical or histological structure in cardiac tissue, so it has no role in maintaining the cohesion of heart muscle cells.
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