Sarcolemma - Study guides, Class notes & Summaries

Kin 1A03 McMaster Final Exam Review (2023/2024) 100% Pass excitation-contraction coupling AP from NS turns into muscle contraction -MAP propagated along sarcolemma into t-tubules -Ca+ channels in SR open and release into sarcoplasm -Ca+ binds to troponin and tropomyosin detaches -X bridge forms myofibril entire muscles length - series of sarcomeres state of each of the bands when muscle is relaxed vs contracted A band (all of myosin) H zone - only myosin I band - only actin A band doesn't ch...

Myocyte Muscle cell Sarcolemma Plasma membrane of myocyte Sarcoplasm Cytoplasm of myocyte Myofibril Tightly packed filament bundles found within skeletal muscle fibers. Contractional unit of a muscle cell. Sarcoplasmic reticulum Site of calcium storage in a muscle cell. Surrounds the myofibrils Transverse tubules (T-tubule) Inward extensions of the sarcolemma that dive into the muscle fiber and surround each myofibril to form a tunnel-like network within the muscle fiber Terminal cisternae...

ACSM CPT Exam Review Questions 2023 What is the function of the tricuspid valve? A. It acts as a pacemaker. B. To pump blood through the heart. C. Prevents backflow of blood to the left atrium. D. Prevents backflow of blood to the right atrium. What is the fundamental unit of muscle contraction? A. Myofibril B. Sarcomere C. Myosin D. Sarcolemma Which chamber of the heart is responsible for pumping oxygenated blood to the body? A. Right ventricle B. Left ventricle C. Right atr...

2024 NSCA-CSCS EXAM - TOP 100 PREP QUESTION WITH CORRECT DETAILED AND ANSWERS/100% VERIFIED patella. - ANSWER: superior Which of the following is the smallest contractile unit of skeletal muscle? myosin epimysium sarcolemma sarcomere - ANSWER: sarcomere

Three types of muscle in the human body are the following except: a. striated b. cardiac c. smooth d. celiac - Answer d. celiac The following are FUNCTIONAL characteristics of muscle except: a. heat production b. communication c. excitability d. extendability - Answer C. communication A muscle cell membrane is: a. a sarcolemma b. made of dense connective tissue c. larger the muscle organ itself d. non permeable - Answer a. a sarcolemma The 2 myofilaments in a myofi...

BIO 264 FINAL EXAM 2024 WITH 100% CORRECT ANSWERS Once excitation-contraction coupling has occurred, calcium ion concentration increases dramatically in the: a. sarcoplasmic reticulum b. cytosol of the muscle fiber c. sarcolemma d. terminal cisterna e. there is no change in calcium concentration - correct answer b. cytosol of the muscle fiber As Lisa drove home, she was suddenly alerted to the sound of a blaring horn and realized she had drifted off to sleep. Which nervous system ...

ACSM CPT Review Exam Questions & Answers 2024/2025 What is the function of the tricuspid valve? A. It acts as a pacemaker. B. To pump blood through the heart. C. Prevents backflow of blood to the left atrium. D. Prevents backflow of blood to the right atrium. - ANSWERSAnswer: D What is the fundamental unit of muscle contraction? A. Myofibril B. Sarcomere C. Myosin D. Sarcolemma - ANSWERSAnswer: B Which chamber of the heart is responsible for pumping oxygenated blood to the bod...

What is the Muscle Cell? correct answers the muscle fiber Structure of a skeletal muscle correct answers a bundle of fibers - Epimysium - Perimysium - Endomysium - Fascicle -Sarcolemma - Muscle fibril - Myofibril Epimysium correct answers covers the entire skeletal muscle Perimysium correct answers surrounds fascicles Endomysium correct answers surrounds each muscle fiber Fascicle correct answers bundle of muscle fibers Sarcolemma correct answers Muscle's plasma membr...

what does the SR store - proteins and calcium what is the role of the transverse tubules in the muscle fiber - allow inside of muscle to communicate with the outside of the muscle how is a sarcomere measured - from z-disc to z-disc what is contained in the I band of the sarcomere & what color is the band - thin filaments titin z-disc light (isotropic) what is contained in the A band of the sarcomere & what color is the band - thick filaments thin filaments dark (scatters lig...

Bio 264 Exam 3 Questions and Answers Already Passed What structure runs from Z line to Z line? Sarcomere The movement of the troponin-tropomyosin complex requires _______ Ca2+. The actin filament is a polymer formed from 300 to 400 globular subunits called ______ G- actin. A myofilament is the _________. Protein strand composed of actin or myosin T tubules ________. Conduct action potentials deep into the muscle cell A drug that interferes with the active transport of calci...