Podcast
Questions and Answers
What is the primary function of actin and myosin in muscle cells?
What is the primary function of actin and myosin in muscle cells?
- Actin and myosin control the mitochondrial content of muscle fibers
- Actin and myosin are involved in muscle contraction through a sliding filament system (correct)
- Actin and myosin are responsible for muscle fiber classification
- Actin and myosin regulate intracellular calcium levels
Which statement best describes the energy sources primarily utilized by cardiac muscle?
Which statement best describes the energy sources primarily utilized by cardiac muscle?
- Cardiac muscle mainly relies on ketone bodies for energy production.
- Cardiac muscle depends solely on anaerobic metabolism for energy supply.
- Cardiac muscle mainly utilizes fatty acids, glucose, and lactate for energy. (correct)
- Cardiac muscle exclusively uses carbohydrates as its energy source.
How are smooth muscles different from skeletal muscles?
How are smooth muscles different from skeletal muscles?
- Smooth muscles have striations, while skeletal muscles do not.
- Smooth muscles contain multinucleated fibers, unlike skeletal muscles.
- Skeletal muscles are voluntary, but smooth muscles are involuntary. (correct)
- Skeletal muscles are spindle-shaped, while smooth muscles are cylindrical.
What is the role of creatine phosphate in muscle cells during exercise?
What is the role of creatine phosphate in muscle cells during exercise?
What happens when there is an absence of the protein dystrophin in the body?
What happens when there is an absence of the protein dystrophin in the body?
Which type of muscle fibers have low oxidative capacity and generate most of their ATP through glycolysis?
Which type of muscle fibers have low oxidative capacity and generate most of their ATP through glycolysis?
What is the main source of ATP during exercise in type IIB fast-twitch glycolytic muscle fibers?
What is the main source of ATP during exercise in type IIB fast-twitch glycolytic muscle fibers?
What process provides a considerable portion of the ATP requirement at the onset of exercise for the first few minutes?
What process provides a considerable portion of the ATP requirement at the onset of exercise for the first few minutes?
Which enzyme further inhibits hexokinase in the process of anaerobic glycolysis?
Which enzyme further inhibits hexokinase in the process of anaerobic glycolysis?
