Podcast
Questions and Answers
What is the primary purpose of muscles?
What is the primary purpose of muscles?
- to support the skeleton
- to produce hormones
- to contract for purposeful movement, manipulation of external objects, propulsion of contents through hollow internal organs, and emptying contents of certain organs to external environment (correct)
- to regulate body temperature
What type of muscle is found only in the heart?
What type of muscle is found only in the heart?
- Skeletal muscle
- Striated muscle
- Smooth muscle
- Cardiac muscle (correct)
Which type of muscle is characterized by dark and light bands?
Which type of muscle is characterized by dark and light bands?
- Involuntary muscle
- Unstriated muscle
- Striated muscle (correct)
- Voluntary muscle
What type of muscle is innervated by neurons in the autonomic nervous system?
What type of muscle is innervated by neurons in the autonomic nervous system?
Which type of muscle is connected to the bones?
Which type of muscle is connected to the bones?
What is the main difference between skeletal muscle and cardiac muscle in terms of control?
What is the main difference between skeletal muscle and cardiac muscle in terms of control?
What is the primary function of myofibrils in a muscle cell?
What is the primary function of myofibrils in a muscle cell?
What is the name of the functional unit of a myofibril, found between Z-lines?
What is the name of the functional unit of a myofibril, found between Z-lines?
What is the role of the myosin subunit that binds actin?
What is the role of the myosin subunit that binds actin?
How do muscles grow?
How do muscles grow?
What is the composition of thin filaments?
What is the composition of thin filaments?
What is the role of the myosin heads during muscle contraction?
What is the role of the myosin heads during muscle contraction?
What is the structure of the backbone of an actin filament?
What is the structure of the backbone of an actin filament?
What is the role of tropomyosin in muscle contraction?
What is the role of tropomyosin in muscle contraction?
What is the function of troponin in muscle contraction?
What is the function of troponin in muscle contraction?
What is the result of calcium binding to troponin?
What is the result of calcium binding to troponin?
What is the function of the cross bridges in muscle contraction?
What is the function of the cross bridges in muscle contraction?
What is the composition of the A band in a sarcomere?
What is the composition of the A band in a sarcomere?
What is the main component of the H zone within the A band?
What is the main component of the H zone within the A band?
What happens to the length of the thick filaments during muscle contraction?
What happens to the length of the thick filaments during muscle contraction?
What happens to the actin binding sites when calcium is present?
What happens to the actin binding sites when calcium is present?
What is the role of troponin in the absence of calcium?
What is the role of troponin in the absence of calcium?
What is the composition of the I band?
What is the composition of the I band?
What is the role of the supporting protein that extends from the M lines to the Z lines?
What is the role of the supporting protein that extends from the M lines to the Z lines?
What surrounds individual muscle fibers?
What surrounds individual muscle fibers?
What is the result of multiple myoblasts fusing together during development?
What is the result of multiple myoblasts fusing together during development?
What is the function of satellite cells?
What is the function of satellite cells?
Why do muscle cells have a large number of mitochondria?
Why do muscle cells have a large number of mitochondria?
What is the shape of a muscle fiber?
What is the shape of a muscle fiber?
What is the term for the process of myoblasts fusing to form myotubes?
What is the term for the process of myoblasts fusing to form myotubes?
