Dermal folds at or near joints on the wrist are examples of
a cutaneous plexus
cleavage lines
flexure lines
friction ridges
The Correct Answer is C
A. a cutaneous plexus: The cutaneous plexus is a network of blood vessels located in the dermis that supplies nutrients to the skin. It is not related to the formation of dermal folds or lines at joints.
B. cleavage lines: Cleavage lines, or tension lines, indicate the natural orientation of collagen fibers in the dermis. They guide surgical incisions for optimal healing but do not specifically form at joint folds.
C. flexure lines: Flexure lines are dermal folds that occur at or near joints, such as the wrist, fingers, and elbows. They allow the skin to bend and stretch without tearing, forming permanent creases where the skin is tightly bound to underlying structures.
D. friction ridges: Friction ridges are the raised patterns on the fingers, palms, and soles that enhance grip. They are not associated with joint folds or skin creases.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. RNA:RNA is a general term for ribonucleic acid and includes several types with different functions. It does not specifically refer to the RNA that delivers amino acids to the ribosome.
B. mRNA:Messenger RNA carries the genetic code from DNA to the ribosome, directing the sequence of amino acids in a protein, but it does not transport the amino acids themselves.
C. sRNA:Small RNA molecules (sRNA) are involved in regulatory processes within the cell, such as gene silencing, and are not responsible for delivering amino acids for protein synthesis.
D. tRNA:Transfer RNA is responsible for bringing specific amino acids to the ribosome during translation. Each tRNA recognizes codons on the mRNA and ensures that the correct amino acids are added to the growing polypeptide chain.
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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