Which structural classification of joints is characterized by being immovable and composed of fibrous, dense connective tissue?
Synovial joints
Cartilaginous joints
Hinge joints
Fibrous joints
The Correct Answer is D
A. Synovial joints: Synovial joints are freely movable joints with a fluid-filled cavity and articular cartilage. They are not composed of dense fibrous tissue and allow a wide range of motion.
B. Cartilaginous joints: Cartilaginous joints are connected by cartilage and allow limited movement, such as in intervertebral discs and the pubic symphysis. They are not completely immovable.
C. Hinge joints: Hinge joints are a type of synovial joint that permits movement in one plane, like the elbow or knee, and are not fibrous or immovable.
D. Fibrous joints: Fibrous joints are composed of dense connective tissue, are immovable (synarthrotic), and include structures such as sutures in the skull that provide stability and protection.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. To transport oxygen in the blood: Oxygen transport is the role of red blood cells, which carry oxygen from the lungs to tissues. Nephrons do not play any part in gas transport but are crucial for filtering and maintaining blood composition.
B. To filter blood and regulate water and electrolyte balance: The nephron is the functional unit of the kidney, consisting of the glomerulus and renal tubules. It filters blood to remove waste products, reabsorbs essential ions and water, and secretes substances into urine, thereby maintaining fluid, electrolyte, and acid-base homeostasis.
C. To store urine: While the nephron produces urine, actual storage occurs in the urinary bladder, which collects and holds urine until micturition. The nephron’s role ends at urine formation.
D. To produce bile: Bile is synthesized by the liver to aid in fat digestion and absorption. This function is completely separate from kidney nephron activity, which focuses on filtration and homeostasis.
Correct Answer is A
Explanation
A. An ion is a charged particle, while an electrolyte is a solution that conducts electricity: Ions are atoms or molecules that carry a positive or negative charge. Electrolytes are substances that dissociate into ions in a solution, enabling the conduction of electrical current.
B. Ions are formed only in solid states, while electrolytes are only in liquids: Ions can exist in solid, liquid, or gaseous states depending on the compound, and electrolytes are defined by their ability to dissociate in a solution, not by state alone.
C. Ions are found only in non-metals, while electrolytes are found in metals: Ions can form from both metals and non-metals, and electrolytes result from ionic compounds dissolving in a solvent, regardless of whether the elements are metallic or non-metallic.
D. An ion is always positive, while an electrolyte is always negative: Ions can be either positive (cations) or negative (anions), and electrolytes contain both types of ions to maintain electrical neutrality in solution.
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