The embryonic skeleton is made up of which kind of tissue?
fibrocartilage CT
hyaline cartilage CT
elastic CT
dense regular CT
elastic cartilage CT
The Correct Answer is B
A. fibrocartilage CT: Fibrocartilage is found in intervertebral discs and some joint areas, providing strong support and shock absorption, but it does not form the embryonic skeleton.
B. hyaline cartilage CT: The embryonic skeleton is primarily composed of hyaline cartilage, which provides a flexible template that allows growth and later ossification into bone during development.
C. elastic CT: Elastic connective tissue contains many elastic fibers, giving flexibility to structures like the lungs and large arteries, but it does not form the framework of the embryonic skeleton.
D. dense regular CT: Dense regular connective tissue forms tendons and ligaments with parallel collagen fibers, providing tensile strength, but it does not contribute to the embryonic skeletal framework.
E. elastic cartilage CT: Elastic cartilage is found in structures requiring flexible support, such as the ear and epiglottis, and is not the primary tissue of the embryonic skeleton.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
A. Merocrine; holocrine:Merocrine glands secrete their products via exocytosis, and holocrine glands release entire cells, but this distinction does not directly describe mucus versus watery secretions.
B. Endocrine; exocrine:Endocrine glands release hormones into the bloodstream, and exocrine glands secrete onto surfaces or into ducts. This classification does not specify the type of fluid produced, such as mucus or watery secretions.
C. Serous; mucous:Serous glands produce a watery, protein-rich secretion, while mucous glands produce thick, sticky mucus. This reverses the secretion types described.
D. Apocrine; mixed:Apocrine glands release portions of cells along with secretions, and mixed glands can produce both mucus and serous products. While related, this does not Correct answer the distinction between mucus and watery fluids.
E. Mucous; serous:Mucous glands secrete mucus, which combines with water to form a thick, sticky product, whereas serous glands produce a relatively watery, enzyme-rich fluid. This accurately distinguishes the two secretion types.
Correct Answer is D
Explanation
A. late prophase:During late prophase, chromosomes condense and the mitotic spindle forms, but cytokinesis has not yet begun as the cell is still preparing for chromosome alignment.
B. early anaphase:Early anaphase involves the separation of sister chromatids toward opposite poles. Cytokinesis does not start at this point because chromosome separation is still in progress.
C. early prophase:Early prophase is the initial stage of mitosis where chromatin condenses into visible chromosomes. Cytokinesis is not initiated at this stage.
D. late anaphase:Cytokinesis begins during late anaphase, when the cell starts forming a cleavage furrow as the chromosomes near the poles. This process continues into telophase, ultimately dividing the cytoplasm into two daughter cells.
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