Sliding filament model - Study guides, Class notes & Summaries

CSULB BIOL 207 Lab Final StudyWhat is the function of skeletal muscle? - correct answer Contracts to cause bone movement What are the structures of the skeletal muscle? - correct answer Tendons and muscle fibers What does muscle fibers contains? - correct answer Bundles of protein filaments What are the two protein filaments in muscle fibers? - correct answer Actin (Thin) and Myosin (Thick) What does the Sliding Filament Model state? - correct answer Actin and myosin DO NOT shorten, ...

What structure in skeletal muscle cells functions in calcium storage? - ANSWER-sarcoplasmic reticulum Creatine phosphate functions in the muscle cell by____________ - ANSWER-storing energy that can be transterred to ADR to resynthesize ATP During muscle contraction, myosin bridges attach to which active sites? - ANSWER-actin filaments The contractile units of skeletal muscles are_________ - ANSWER-Myofibrils Sarcomeres are functional units of ____________ muscle - ANSWER-cardiac & sk...

A and P 1, Exam 1 | Latest Version | 2024/2025 | Already Passed What is the primary function of the skeletal system? To provide support, protect vital organs, and facilitate movement through the attachment of muscles. How do the different types of joints in the human body affect movement? They vary in mobility, from immovable (e.g., sutures in the skull) to freely movable (e.g., ball-and-socket joints like the shoulder). What role do osteoblasts and osteoclasts play in bone r...

In which of the following contractions do muscles lengthen while moving a load? RATIONALE    Concentric Contraction  Eccentric Contraction  Isotonic Contraction  Isometric Contraction UNIT 3 — MILESTONE 3 19/22 CONCEPT  Muscle Contractions 2 Eccentric contraction occurs as the muscle lengthens. In this contraction, the muscle tension is less than the load. Thus, the muscle lengthens and, in the case of elbow extension, lowers the hand weight down. Rep...

Straighterline A&P 1 Cumulative Final Exam Questions With 100% Verified Answers Which is an example of a normally occurring positive-feedback mechanism? - answerstretching of the uterus near the end of pregnancy Which of the following is the most widely distributed type of muscle in the body? - answerSmooth A doctor performing an autopsy on a patient concludes that part of the brain was likely damaged by trauma due to a large population of which type of cell? - answermicroglia During DN...

sarcolemma - Answer-plasma membrane of a muscle fiber sarcoplasmic reticulum - Answer-The smooth ER of a muscle cell, enlarged and specialized to act as a Ca2+ reservoir. The SR winds around each myofibril in the muscle cell. many mitochondria and myofibrils Myofibirls - Answer-bundles of contractile proteins, make up actin and myosin T tubules - Answer-extension of the sarcolemma that extend into the cell, allow membrane to come close to the SR Sarcomere - Answer-Contractile unit o...

A&P 1 Final Exam, Straighterline Anatomy and Physiology 1, Straighterline A&P 1 Cumulative Final 100% Pass What is the smallest level of organization in the body that contains the body's genetic information? Select one: a. chemical b. cellular c. tissue d. organism B. Cellular The cellular level includes the nucleus, an organelle that contains the body's genetic information. Which is an example of a normally occurring positive-feedback mechanism? Select one: a. elevated...

1 BIOS 1108 MODULE 3 EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ Cell Signaling Pathway Correct Answer: "RaceCAR" - Reception of signaling molecule (ligand) to specfiic receptor - protein-to-protein Communication (transduction); ex: receptor-to-enzyme, kinase-totarget -signal Amplification typically with second messengers (cAMP, etc) -sgnal response nuances: tissue/cell-type specific responses, signal crosstalk Direct Signaling Correct Answer: communicati...

Sarcolemma - Answer-surrounding cell membrane around muscle Sarcoplasmic reticulum - Answer-The smooth ER of a muscle cell, Ca2+ reservoir, around each myofibril in the muscle cell. myofibrils - Answer-bundle of contractile proteins within muscle sarcomere - Answer-functional unit of muscle within myofibrils Z lines - Answer-dense set of proteins, has actin protein M line - Answer-not quite as dense, myosin protein stays in the middle A band - Answer-from one end to another of ...

Which of the following best characterizes the structure of DNA? RATIONALE    Double-stranded  Both single and double-stranded  Triple-stranded  Single-stranded MILESTONE 63/70 CONCEPT  Organic Compounds: Nucleic Acids 2 CONCEPT  The Sliding Filament Model DNA is a double-stranded nucleic acid that contains the genetic information responsible for the development and function of cells and organisms. Which of the following is the primary protein that ma...