ATI RN
Muscular System Questions Questions
Question 1 of 5
Which type of epithelial tissue lines the urinary bladder?
Correct Answer: B
Rationale: Transitional epithelium lines the urinary bladder, a stretchy, stratified tissue that expands as the bladder fills and contracts when empty, preventing leaks. Simple columnar suits digestive tracts (e.g., intestines), not stretchy organs. Stratified squamous protects (e.g., esophagus), not stretching. Simple cuboidal is for secretion/absorption (e.g., kidneys), not expansion. Transitional's unique adaptability to volume changes, per urinary system histology, makes 'b' correct.
Question 2 of 5
Which of the following hormones increases blood calcium levels?
Correct Answer: B
Rationale: Parathyroid hormone (PTH) increases blood calcium by stimulating osteoclasts, kidney reabsorption, and vitamin D activation, countering low levels. Calcitonin lowers calcium, depositing it in bones. Estrogen and testosterone affect bone density, not directly calcium. PTH's regulatory role, per endocrinology, makes 'b' correct.
Question 3 of 5
What is the term for the connection between the skull bones?
Correct Answer: A
Rationale: Sutures are immovable, fibrous joints connecting skull bones (e.g., coronal), locking them post-growth. Fontanels are infant soft spots, closing to sutures. Joint is broad, but suture is specific. Ligaments connect bones elsewhere. Sutures' cranial role, per anatomy, makes 'a' correct.
Question 4 of 5
What is the primary function of the sternum?
Correct Answer: B
Rationale: The sternum connects ribs via costal cartilage, supporting the thoracic cavity and protecting heart/lungs. Spinal cord is vertebral, breathing is secondary (diaphragm-driven), skull support is cranial. Sternum's thoracic role, per anatomy, makes 'b' correct.
Question 5 of 5
A scientist wants to study how the body uses foods and fluids during a marathon run. This scientist is most likely a(n)
Correct Answer: A
Rationale: An exercise physiologist studies how the body functions during physical activity, like a marathon, focusing on metabolism, hydration, and energy use perfect for analyzing food/fluid utilization. A microscopic anatomist examines cellular structures, not whole-body processes. Regional physiologist isn't a standard term; physiology isn't typically region-specific here. Systemic anatomist studies structural systems, not dynamic function. Exercise physiology's emphasis on performance and metabolism, per scientific roles, makes 'a' correct.