ati teas 7 science

Correct Answer: C

Rationale: The myelin sheath is derived from nervous tissue, specifically glial cells. Glial cells, also known as neuroglia, support and protect nerve cells. They produce the myelin sheath, which insulates nerve fibers and allows for faster transmission of nerve impulses. Epithelial tissue (choice A) primarily covers and lines body surfaces, muscle tissue (choice B) is responsible for movement, and connective tissue (choice D) provides support and structure to the body. None of these tissues are involved in the production of the myelin sheath, making them incorrect choices.

Correct Answer: B

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: C

Rationale: The correct answer is C: Holding urine in the bladder for long periods is NOT recommended for optimal urinary system health. When urine is held for a long time, it can increase the risk of urinary tract infections and bladder issues. It can also lead to bladder distension and potential damage to the bladder muscles. To maintain urinary system health, it is crucial to empty the bladder regularly to prevent bacterial growth and support proper bladder function. Choices A, B, and D are recommended practices for optimal urinary system health. Limiting high-sodium foods helps reduce the risk of kidney stones and hypertension, consuming cranberry juice can help prevent urinary tract infections, and regular moderate-intensity exercise promotes overall health, including the urinary system.

Correct Answer: D

Rationale: The correct answer is D because muscle tissue is indeed involved in all the functions listed. Muscles generate body heat through metabolism, stabilize joints by providing support and movement, and help maintain posture by keeping the body in an upright position. Therefore, muscle tissue plays a crucial role in all these functions. Choices A, B, and C are incorrect individually as they only represent a part of the functions that muscle tissue is involved in, whereas the correct answer encompasses all aspects of muscle function in the body.

Correct Answer: B

Rationale: The correct answer is B: Myosin. Myosin is the protein complex responsible for the thick filament in the sarcomere. It forms cross-bridges with actin during muscle contraction. Actin (choice A) is the thin filament in the sarcomere. Tropomyosin (choice C) is a regulatory protein that covers the myosin-binding sites on actin when the muscle is at rest. Troponin (choice D) is another regulatory protein that helps regulate muscle contraction by binding calcium ions.