ATI RN
Muscular System Questions Questions
Question 1 of 5
What nutritional strategies will not improve performance during prolonged endurance type exercise?
Correct Answer: B
Rationale: Tapering, reducing training volume pre-event, preserves energy and aids recovery but doesn't directly enhance fuel availability or use during prolonged endurance exercise, unlike nutritional strategies. Carbohydrate loading and the classic regime (depletion then high-carb intake) boost muscle glycogen stores, extending endurance. Exogenous carbohydrate ingestion during exercise (e.g., gels) maintains blood glucose, delaying fatigue. Tapering's rest focus, while beneficial for freshness, lacks the direct substrate impact of carb-based methods, distinguishing it as less performance-enhancing in fuel terms, key for endurance optimization.
Question 2 of 5
The rhomboid major and minor muscles are deep to the
Correct Answer: C
Rationale: Rhomboid major and minor, retracting the scapula, lie deep to trapezius, a superficial back muscle covering them. Rectus abdominis is anterior, abdominal. Scalenes are in the neck, unrelated. Ligamentum nuchae, a neck ligament, aligns with deeper muscles but not rhomboids' position. Trapezius' superficiality over rhomboids distinguishes it, key for back layering.
Question 3 of 5
Deficiency of which vitamin can lead to irritability, loss of appetite, and beriberi?
Correct Answer: C
Rationale: Vitamin deficiencies cause specific symptoms based on their metabolic roles. Beriberi, characterized by muscle weakness, nerve damage, and heart issues, results from insufficient thiamine, a nutrient vital for carbohydrate metabolism and nerve function. Found in whole grains, legumes, and nuts, thiamine deficiency leads to energy deficits, manifesting as irritability and appetite loss. Vitamin K aids clotting, its deficiency causing bleeding, not beriberi. Vitamin B12 supports nerve health and blood formation, with deficiency linked to anemia and neuropathy, not beriberi. Vitamin B6 assists protein metabolism, its lack causing dermatitis or seizures. Thiamine's unique role in energy production and its association with beriberi's distinct symptoms pinpoint it as the correct vitamin.
Question 4 of 5
Hydrogen can be prepared in the lab by combining Zn and HCl; the resulting reaction is metallic zinc:
Correct Answer: C
Rationale: In the reaction Zn + 2HCl → ZnCl₂ + H₂, zinc displaces hydrogen from hydrochloric acid. Zinc atoms react with HCl, taking hydrogen's place to form zinc chloride, releasing hydrogen gas. This single displacement reaction doesn't transmute zinc into another element, nor does it primarily involve water or catalysis zinc is a reactant, not a catalyst. The replacement of hydrogen, driven by zinc's higher reactivity, produces hydrogen gas, a classic lab method, highlighting chemical reactivity and gas evolution principles.
Question 5 of 5
Suppose cube a is 10 cm along each edge and cube b is 5 cm along each edge. What is the relationship of the volume of cube a to that of cube b ?
Correct Answer: D
Rationale: Volume of a cube is edge length cubed. Cube A (10 cm) has a volume of 10 × 10 × 10 = 1000 cm³; Cube B (5 cm) is 5 × 5 × 5 = 125 cm³. Dividing 1000 by 125 yields 8, meaning Cube A's volume is 8 times Cube B's. The edge ratio (10/5 = 2) cubes to 2³ = 8, confirming this. Options 2x, 4x, and 6x miscalculate the exponential relationship, making 8x the correct volumetric comparison.