Actin filaments Study guides, Class notes & Summaries

NASM 2024 Practice Test Questions with Correct Answers A-Band - Answer-The region of the sarcomere where myosin filaments are predominantly seen with minor overlap of the actin filaments Abduction - Answer-A movement in the frontal plane away from the midline of the body Acceleration - Answer-When a muscle exerts more force than is being placed on it, the muscle will shorten. Also known as concentric contraction or force production Acidosis - Answer-The accumulation of excessive hydro...

3 Distinct Types of Muscle correct answers 1. Skeletal muscle ~ 40% BW, has striated, tubular multinucleated fibers, usually attached to skeleton, voluntary 2. Smooth muscle- narrow, atpered rod shaped cells, nonstriated, uninucleated fibers, occurs in the walls of internal organs and blood vessles, involuntary 3. Cardiac muscle (smooth + cardiac= 10% BW) - striated, tubular, branches, uninucleated fibers, occurs in the walls of the heart, involuntary Muscle is an excitable contractil...

HESI A2 Anatomy and Physiology (5) Exam (Latest 2024 Update) Questions and Verified Answers| 100% correct| Grade A Q: Which of the following statements accurately describes the basics of the sliding filament model of muscle contraction? Answer: A: Myosin filaments form and break cross-bridges with actin in order to pull the actin filaments closer to the M line. Q: What is one of the characteristics of transitional epithelial tissue that differentiates it from the other t...

Which of the following is a recognized function of skeletal muscle? 1) A) guard body entrances and exits B) maintain posture C) maintain body temperature D) produce movement E) all of the above - ANSWER E Nerves and blood vessels that service the muscle fibers are located in the connective tissues of the A) myofibrils. B) sarcolemma. C) endomysium. D) sarcomere. E) perimysium. - ANSWER E Which of the following best describes the term sarcoplasmic reticulum? A) larg...

2024 NSCA CSCS Exam ( Version 5 ) New Full Exam Questions and Answers ( Included ) 100% Correct 1. sliding filament theory Answer: theory that actin filaments slide toward each otherduring muscle contraction, while the myosin filaments are still 2. Z line Answer: A dark thin protein band to which actin filaments are attached in a striated muscle fiber, marking the boundaries between adjacent sarcomeres. 3. T tubules Answer: Also called transverse tubules, these are deep invaginations...

What are intermediate filaments? CORRECT ANSWER Protein fibers that are wound together and is responsible for giving skin cells their scaffolding and rigidity Why are they called intermediate filaments? CORRECT ANSWER They are located in between the other two types of cytoskeletal elements (actin and microtubules) What characteristics do they endow cells with? CORRECT ANSWER Give cells a sturdy and unbendable shape Intermediate filaments are classified as part of the cells? CORRECT ANSW...

Which of the following is a recognized function of skeletal muscle? 1) A) guard body entrances and exits B) maintain posture C) maintain body temperature D) produce movement E) all of the above E Nerves and blood vessels that service the muscle fibers are located in the connective tissues of the A) myofibrils. B) sarcolemma. C) endomysium. D) sarcomere. E) perimysium. E Which of the following best describes the term sarcoplasmic reticulum? A) largely made of myosin m...

Test Bank Essential Cell Biology 5th Edition Alberts Hopkin Table of Contents CHAPTER 1: CELLS: THE FUNDAMENTAL UNITS OF LIFE ................................................................ 2 CHAPTER 2: CHEMICAL COMPONENTS OF CELLS ........................................................................ 21 CHAPTER 3: ENERGY, CATALYSIS, AND BIOSYNTHESIS .............................................................. 48 CHAPTER 4: PROTEIN STRUCTURE AND FUNCTION ......................................

Pre-Lab Questions 1. How do banding patterns change when a muscle contracts? When a muscle contracts, the banding patterns within the muscle change due to the sliding filament theory of muscle contraction. This theory suggests that muscle contraction occurs when thin filaments (actin) slide over thick filaments (myosin), resulting in the overlapping of these filaments and shortening of the sarcomeres, which are the basic contractile units of the muscle. As a result, the dark A bands, which...

2024 NSCA CSCS Exam ( Version 1 ) New Full Exam Questions and Answers ( Included ) 100% Correct 1. A skeletal is made up of many ,which contain muscle or muscle that are multinucleated. Each of these contain which are the primary intracellular structure (cylindarshaped) which make up the and contain thick protein filaments called and thin protein filaments called . Myosin filament contains globular heads called Answer: skeletal muscle is made up of many fascicles, which contain musc...