What structure is the arrow pointing to? (be specific)
Sebaceous gland
Sweat gland
Hair follicle root
Arrector pili muscle
The Correct Answer is A
A. Sebaceous gland: Sebaceous glands are small, sac-like structures that secrete sebum into the hair follicle. They are located adjacent to the follicle.
B. Sweat gland: Sweat glands are coiled tubular structures found deeper in the dermis or subcutaneous tissue. They appear as tightly coiled masses rather than elongated tubular structures associated with hair.
C. Hair follicle root: This structure anchors the hair shaft and is surrounded by the follicular bulb and dermal papilla, making it distinct from glands or muscles.
D. Arrector pili muscle: The arrector pili muscle is a small band of smooth muscle attached to the hair follicle. It is not the main tubular structure of the follicle itself but rather a thin strand that causes hair to stand upright when contracted.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Simple Squamous Epithelium: This tissue consists of a single layer of flat, scale-like cells that are tightly packed together to form a lining (like in the lungs or blood vessels). The cells in the image are free-floating and distinct from one another, which contradicts the "sheet-like" structure of epithelium.
B. Connective Tissue (Blood): Blood is classified as a specialized form of connective tissue because it consists of cells (formed elements) suspended in a non-living fluid matrix (plasma). Two larger cells with stained purple nuclei are visible-a neutrophil (top left with a multi-lobed nucleus) and a lymphocyte (bottom right with a large, round nucleus).
C. Nervous Tissue: Nervous tissue is characterized by neurons with long processes (axons and dendrites) and smaller supporting glial cells. The circular, isolated cells in this image do not possess the branching morphology typical of neural cells.
D. Smooth Muscle Tissue: Smooth muscle consists of elongated, spindle-shaped cells with a single central nucleus, usually arranged in tight sheets or bundles. The cells in the image are primarily rounded and dispersed, which is not characteristic of muscle fibers.
Correct Answer is A
Explanation
A. Smooth muscle tissue: Found in walls of hollow organs (e.g., intestines, blood vessels). It lacks striations and has spindle-shaped cells with a single central nucleus.
B. Cardiac muscle tissue: Found only in the heart. It is striated but has branching fibers and intercalated discs, which are not seen here.
C. Nervous tissue: Composed of neurons and glial cells, specialized for communication, not contraction.
D. Skeletal muscle tissue: Skeletal muscle tissue is characterized by long, cylindrical, striated fibers with multiple nuclei located peripherally. It is under voluntary control and attaches to bones to produce movement. The striations visible in the model represent the organized arrangement of actin and myosin filaments, which are essential for contraction
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