A client presents with swelling and stiffness in the knee joint. Upon assessment, which structure is most likely involved in easing movement?
Synovial membrane
Tendon
Cartilage
Posterior ligament
The Correct Answer is A
Choice A reason: The synovial membrane lines the inner surface of the articular capsule and secretes synovial fluid, which is a viscous substance that provides lubrication, reduces friction between articular cartilages, and delivers nutrients to the avascular hyaline cartilage, thereby facilitating smooth joint movement and directly easing mechanical joint stress.
Choice B reason: Tendons are specialized fibrous connective tissues that attach skeletal muscle to bone and are primarily responsible for transmitting mechanical forces generated by muscle contraction to produce movement. While they support joint stability, they are not the primary structure responsible for the lubrication required for easing joint movement.
Choice C reason: Articular cartilage provides a smooth, low-friction surface for joints to articulate, but it does not produce the fluid required to ease movement. It functions as a load-bearing material that distributes mechanical forces across the joint surface, preventing bone-to-bone contact, but relies on synovial fluid for functional lubrication.
Choice D reason: The posterior ligament complex, including the posterior cruciate ligament and the posterior capsule, functions primarily to provide structural integrity, resist posterior translation of the tibia, and maintain joint stability during flexion and extension. It does not play a functional role in the physiological lubrication of the joint cavity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: The right sternal border at the second intercostal space is the anatomical landmark for the aortic valve auscultation site. It is distinct from Erb's point and is specifically used to listen for sounds generated by blood flow through the aortic valve into the ascending aorta.
Choice B reason: The left sternal border at the fourth intercostal space is the standard landmark for the tricuspid valve auscultation site. This position allows the nurse to best hear sounds originating from the tricuspid valve as the leaflets close during ventricular systole, rather than the primary point for Erb's.
Choice C reason: Erb's point is traditionally located at the left sternal border in the third intercostal space. It is a critical anatomical site where the sounds of both the aortic and pulmonic valves are often heard with equal intensity, making it an optimal location for detecting cardiac murmurs.
Choice D reason: The left midclavicular line at the fifth intercostal space is the location of the mitral valve, also known as the apex of the heart or the point of maximal impulse. It is where the first heart sound is typically heard best and is not the location for Erb's point.
Correct Answer is B
Explanation
Choice A reason: The aortic valve is auscultated at the second intercostal space along the right sternal border. This location is anatomically optimized to capture sounds generated by blood flow exiting the left ventricle through the aortic valve into the systemic circulation, rather than the mitral valve site.
Choice B reason: The mitral valve is anatomically located at the cardiac apex. Auscultation at the fifth intercostal space along the left midclavicular line allows the stethoscope to be placed directly over this point of maximal impulse, where the mitral valve's S1 closure is most distinctively heard during the cardiac cycle.
Choice C reason: The pulmonic valve is auscultated at the second intercostal space along the left sternal border. This position is specific to monitoring the closure of the semilunar pulmonic valve and is distinct from the apical position used for the mitral valve.
Choice D reason: Erb's Point is situated at the third intercostal space along the left sternal border. This is a common location where sounds from both the aortic and pulmonic valves are heard with relatively equal intensity, facilitating the detection of murmurs, but it is not the anatomical site for the mitral valve.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today