Podcast
Questions and Answers
What is the term used to describe the large mass of muscle that powers movement?
What is the term used to describe the large mass of muscle that powers movement?
- Sarcoplasm
- Sarcomere
- Myofibril
- Muscle Belly (correct)
Which protein covers actin binding sites at rest in muscle fibers?
Which protein covers actin binding sites at rest in muscle fibers?
- Troponin T
- Myosin
- Actin
- Tropomyosin (correct)
What is the sarcolemma in a muscle fiber?
What is the sarcolemma in a muscle fiber?
- Membrane of the muscle fiber (correct)
- Contractile unit
- Energy stores and signaling mechanisms
- Inner material surrounding fibers
Which component is considered the smallest complete contractile system in muscle cells?
Which component is considered the smallest complete contractile system in muscle cells?
Which protein filament is considered 'relaxing' and covers actin binding sites in muscle fibers?
Which protein filament is considered 'relaxing' and covers actin binding sites in muscle fibers?
Which type of bands do the myofilaments overlap to form in a muscle fiber?
Which type of bands do the myofilaments overlap to form in a muscle fiber?
What is the primary cause of muscle cramps during exercise?
What is the primary cause of muscle cramps during exercise?
Which part of the muscle is considered the immovable end?
Which part of the muscle is considered the immovable end?
What is the cause of rigor mortis after death?
What is the cause of rigor mortis after death?
In the condition of tetanus, what happens to the neurotransmitter acetylcholine?
In the condition of tetanus, what happens to the neurotransmitter acetylcholine?
Which type of muscle primarily relies on extracellular calcium for contraction?
Which type of muscle primarily relies on extracellular calcium for contraction?
What is the main difference in the mechanism of contraction between skeletal and smooth muscles?
What is the main difference in the mechanism of contraction between skeletal and smooth muscles?
What is the role of voltage-gated Ca2+ channels in the neuromuscular junction?
What is the role of voltage-gated Ca2+ channels in the neuromuscular junction?
What happens when Na+ channels open in response to Ach binding with NM Receptors at the Muscle End Plate?
What happens when Na+ channels open in response to Ach binding with NM Receptors at the Muscle End Plate?
What is the function of Ryanodine Receptors in the process of muscle contraction?
What is the function of Ryanodine Receptors in the process of muscle contraction?
What is the immediate result of Trop C binding with Ca2+ during muscle contraction?
What is the immediate result of Trop C binding with Ca2+ during muscle contraction?
What occurs once myosin binds to the Second Binding Site in actin during muscle contraction?
What occurs once myosin binds to the Second Binding Site in actin during muscle contraction?
What is the role of ATP binding to myosin head during muscle contraction?
What is the role of ATP binding to myosin head during muscle contraction?
What is the function of creatine phosphate in muscle cells?
What is the function of creatine phosphate in muscle cells?
Which molecule is responsible for the sustained contraction of individual fibers even when the muscle is at rest?
Which molecule is responsible for the sustained contraction of individual fibers even when the muscle is at rest?
What is the main source of energy for muscle contractions?
What is the main source of energy for muscle contractions?
Which term refers to the minimal strength required to cause a muscle contraction?
Which term refers to the minimal strength required to cause a muscle contraction?
What happens to muscles during hypertrophy?
What happens to muscles during hypertrophy?
In muscle fibers, what does the all-or-none response principle imply?
In muscle fibers, what does the all-or-none response principle imply?
What is responsible for the brief period of repolarization in Phase 1 of the action potential?
What is responsible for the brief period of repolarization in Phase 1 of the action potential?
Which phase is characterized by a plateau of action potential due to Ca2+ influx?
Which phase is characterized by a plateau of action potential due to Ca2+ influx?
What inhibits muscle contraction in smooth muscles?
What inhibits muscle contraction in smooth muscles?
What is responsible for the slowly depolarizing prepotential in the SA Node?
What is responsible for the slowly depolarizing prepotential in the SA Node?
Which component of smooth muscles phosphorylates and activates myosin heads?
Which component of smooth muscles phosphorylates and activates myosin heads?
What is the main function of Caveoli in smooth muscles?
What is the main function of Caveoli in smooth muscles?
