Podcast
Questions and Answers
What is the major biochemical transducer that converts potential 'chemical' energy into mechanical energy in muscles?
What is the major biochemical transducer that converts potential 'chemical' energy into mechanical energy in muscles?
- Myofibrils (correct)
- ATP
- Sarcolemma
- Z disc
Which type of muscle is composed of multinucleated muscle fiber cells surrounded by sarcolemma?
Which type of muscle is composed of multinucleated muscle fiber cells surrounded by sarcolemma?
- Skeletal muscle (correct)
- Cardiac muscle
- Smooth muscle
- Striated muscle
Where in the sarcomere are only actin filaments present?
Where in the sarcomere are only actin filaments present?
- H zone
- M line
- I band (correct)
- Z disc
Which part of the sarcomere includes overlapping myosin and actin filaments?
Which part of the sarcomere includes overlapping myosin and actin filaments?
What is the central line of the sarcomere where myosin filaments are anchored called?
What is the central line of the sarcomere where myosin filaments are anchored called?
What is the immediate energy source for muscle contraction and relaxation?
What is the immediate energy source for muscle contraction and relaxation?
What happens when Ca++ ions bind to troponin C in the thin filaments?
What happens when Ca++ ions bind to troponin C in the thin filaments?
What occurs during the hydrolysis of ATP by ATPase activity of myosin?
What occurs during the hydrolysis of ATP by ATPase activity of myosin?
What happens when Ca++ ion is pumped back into the sarcoplasmic reticulum?
What happens when Ca++ ion is pumped back into the sarcoplasmic reticulum?
What enzyme is responsible for hydrolyzing ATP into ADP + Pi + High amounts of energy in muscles?
What enzyme is responsible for hydrolyzing ATP into ADP + Pi + High amounts of energy in muscles?
What is the result of myosin detaching from F-actin in muscles?
What is the result of myosin detaching from F-actin in muscles?
What are the three types of proteins that compose thin filaments in muscle?
What are the three types of proteins that compose thin filaments in muscle?
Which protein is present in all muscle types?
Which protein is present in all muscle types?
How many subunits make up the protein Troponin?
How many subunits make up the protein Troponin?
Which type of myosin has ATPase activity?
Which type of myosin has ATPase activity?
What is the name of the process when acetylcholine binds to its receptor at the motor end plate?
What is the name of the process when acetylcholine binds to its receptor at the motor end plate?
What leads to the release of Ca++ from the sarcoplasmic reticulum during muscle contraction?
What leads to the release of Ca++ from the sarcoplasmic reticulum during muscle contraction?
What is the effect of two successive stimuli dependant on?
What is the effect of two successive stimuli dependant on?
In which situation is there no response to the second stimulus?
In which situation is there no response to the second stimulus?
What is a physiological contracture also known as?
What is a physiological contracture also known as?
What is Rigor mortis characterized by?
What is Rigor mortis characterized by?
How do smooth muscle fibers connect with each other?
How do smooth muscle fibers connect with each other?
Which type of smooth muscle does not obey all or none law?
Which type of smooth muscle does not obey all or none law?
Which type of nerves supply both motor and inhibitory functions to smooth muscles?
Which type of nerves supply both motor and inhibitory functions to smooth muscles?
What is a characteristic of smooth muscle in terms of sarcomere and striation?
What is a characteristic of smooth muscle in terms of sarcomere and striation?
Which structure is not present in smooth muscle compared to skeletal muscle?
Which structure is not present in smooth muscle compared to skeletal muscle?
Which property describes the contraction of smooth muscle as 'myogenic'?
Which property describes the contraction of smooth muscle as 'myogenic'?
In comparison to skeletal muscle, what is a characteristic of the movement of smooth muscle?
In comparison to skeletal muscle, what is a characteristic of the movement of smooth muscle?
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