Anatomical position is important because
it allows a common point of reference for body position to help communicate anatomical relationships
it provides the greatest circulation to the extremities
it is only viewed from a posterior position
it is the position most comfortable to hospital patients
The Correct Answer is A
A. It allows a common point of reference for body position to help communicate anatomical relationships: Anatomical position standardizes the body orientation. This consistency allows healthcare professionals and anatomists to describe locations, directions, and relationships accurately.
B. It provides the greatest circulation to the extremities: Circulation is not determined by anatomical position. Blood flow is regulated by the cardiovascular system and body physiology, not the reference position for describing anatomy.
C. It is only viewed from a posterior position: Anatomical position is defined from a frontal perspective with the body facing forward. It is not limited to posterior viewing and applies to all directional and relational anatomical descriptions.
D. It is the position most comfortable to hospital patients: Anatomical position is not based on comfort but on creating a standardized reference. Patient comfort varies depending on medical condition, mobility, and treatment requirements.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. pH less than 6.8: Hydrogen bonds within proteins and nucleic acids are sensitive to strong acidic conditions. When pH falls below 6.8, the high concentration of hydrogen ions disrupts the weak bonds that stabilize molecular structures, leading to denaturation.
B. pH less than 7.8: A pH slightly below 7.8 is still within a physiologically tolerable range and does not usually disrupt hydrogen bonding. The structure of most proteins remains intact in this environment, so denaturation is unlikely here.
C. pH between 7.34 and 7.45: This range represents the normal physiologic blood pH. Within this range, hydrogen bonds remain stable, supporting the proper folding and function of proteins and enzymes.
D. pH between 6.8 and 7.8: This range includes near-normal physiological pH and only mild deviations into acidosis or alkalosis. While extremes outside this range can damage hydrogen bonds, values here are not usually severe enough to cause denaturation.
Correct Answer is D
Explanation
A. Transport proteins: Transport proteins are essential for moving ions, nutrients, and other molecules across the plasma membrane. While they play an important role in cardiac muscle function, they do not address mechanical stress caused by repeated contractions.
B. Glycolipids: Glycolipids contribute to cell recognition, signaling, and stability of the cell membrane. However, they are not structural elements that resist the pulling forces and stress cardiac muscle cells experience during contraction.
C. Tight junctions: Tight junctions create a seal between adjacent cells to prevent leakage of extracellular fluid. In cardiac muscle, their role is less about mechanical strength and more about maintaining selective permeability, so they do not counteract contractile stress effectively.
D. Desmosomes: Desmosomes are strong anchoring junctions that mechanically bind cardiac muscle cells together. They provide structural integrity and prevent separation during forceful contractions, making them the key feature that resists mechanical stress in the myocardium.
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