teas version 7 quizlet science - Nurselytic

Correct Answer: B

Rationale: The correct answer is B, 'Sarcomere.' The sarcomere is indeed the functional unit of a skeletal muscle responsible for muscle contraction. It is composed of actin and myosin filaments that interact to generate muscle contraction.
Choice A, 'Myofibril,' is incorrect as myofibrils are composed of sarcomeres, not the functional units themselves.
Choice C, 'Tendon,' is incorrect as tendons connect muscles to bones and do not directly participate in muscle contraction.
Choice D, 'Myoglobin,' is incorrect as myoglobin is a protein that stores oxygen in muscle cells and is not directly involved in muscle contraction.

Correct Answer: D

Rationale: The correct answer is D. The production of digestive enzymes is not a function of the integumentary system. The integumentary system is responsible for regulating body temperature, protecting the body from pathogens, and synthesizing vitamin D. Digestive enzymes are produced by organs in the digestive system, such as the pancreas and stomach, and not by the integumentary system.

Correct Answer: A

Rationale: Delta waves are slow brain waves associated with deep sleep stages, specifically stages 3 and 4 of non-REM sleep. These waves have a frequency range of 0.5-4 Hz.
Choice B (4-8 Hz) refers to theta waves, which are associated with light sleep and relaxation.
Choice C (8-13 Hz) corresponds to alpha waves, present during wakeful relaxation.
Choice D (13-30 Hz) represents beta waves, seen in active thinking and concentration.
Therefore, the correct answer is A because it aligns with the frequency range characteristic of delta waves during deep sleep.

Correct Answer: A

Rationale: The correct answer is A: Ventral carries motor, dorsal carries sensory information. In the spinal nerve, the ventral root carries motor information from the spinal cord to the muscles, while the dorsal root carries sensory information from the peripheral sensory receptors to the spinal cord.
Therefore, other choices are incorrect.
Choice B is incorrect as it states the opposite roles of ventral and dorsal roots.
Choice C is incorrect as the size comparison between ventral and dorsal roots is not related to their functions.
Choice D is incorrect as the terms 'anteriorly' and 'posteriorly' are not commonly used to describe the locations of ventral and dorsal roots in relation to each other.

Correct Answer: C

Rationale: The correct answer is C, the nucleus. The nucleus is the control center of the cell and houses the genetic information in the form of DNA. The Golgi apparatus (choice
A) is responsible for packaging and processing proteins, the ribosome (choice
B) is involved in protein synthesis, and the endoplasmic reticulum (choice
D) is involved in protein and lipid synthesis.
Therefore, choices A, B, and D are not the correct answers as they do not house the genetic information or serve as the control center of the cell.