BIOL 2113 Chapter 9 - Exam 3
Questions and Actual Answers.
Skeletal and smooth muscle cells are also referred to as ___________. - Answer muscle fibers
What is most directly associated with the attachments formed between muscles and bones? -
Answer epimysium
Which of the following is not found within a skeletal muscle?
- osseous tissue
- connective tissue proper
- nervous tissue
- blood vessels - Answer osseous tissue
What is the smallest structural unit of muscles? - Answer Myofilament
Which of the following structures is incorrectly paired with its description?
- A band : composed predominantly of the protein actin
- sarcomere : bordered at each end by a z disc
- T tubule : extension of sarcolemma
- SR : membranous organelles containing high concentrations of Ca+ - Answer A band :
composed predominantly of the protein actin
What does not change length during shortening resulting for muscle contraction? - Answer
thin myofilaments
Voltage gated Na+ and K+ channels are associated most directly with what event during
stimulation of a muscle fiber? - Answer propagating the action potential along the
sarcolemma
What occurs last among the events that trigger cross bridge formation? - Answer bind of Ca+
to troponin
, Increased contractile force due to recruitment results from _______. - Answer stimulation of a
muscle by increasing numbers of activated somatic motor neurons
What is expected to occur during the recovery period following strenuous exercise? - Answer
glycogen is formed from glucose
What explains the decreased contractile force generated by a stretched muscle? - Answer
Stretching of myofibrils within the muscle fibers decreases the overlap between thin and thick
myofilaments
Which of the following is not a characteristic of fast glycolytic fibers?
- depends on blood delivered nutrients
- relatively large fiber diameter
- white appearance
- powerful contractions by quick to fatigue - Answer depends on blood delivered nutrients
What statement describes a similarity between smooth muscle and skeletal muscle? - Answer
Both smooth muscle and skeletal muscle contain thin and thick myofilaments
The connective tissue covering that encloses the sarcolemma of an individual muscle fiber is
called the ________. - Answer endomysium
A fascicle is a _______. - Answer bundle of muscle fibers enclosed by a connective tissue
sheath
Contains actin - Answer thin
contains ATPases - Answer thick
attached to the z disc - Answer thin
contains myosin - Answer thick
Questions and Actual Answers.
Skeletal and smooth muscle cells are also referred to as ___________. - Answer muscle fibers
What is most directly associated with the attachments formed between muscles and bones? -
Answer epimysium
Which of the following is not found within a skeletal muscle?
- osseous tissue
- connective tissue proper
- nervous tissue
- blood vessels - Answer osseous tissue
What is the smallest structural unit of muscles? - Answer Myofilament
Which of the following structures is incorrectly paired with its description?
- A band : composed predominantly of the protein actin
- sarcomere : bordered at each end by a z disc
- T tubule : extension of sarcolemma
- SR : membranous organelles containing high concentrations of Ca+ - Answer A band :
composed predominantly of the protein actin
What does not change length during shortening resulting for muscle contraction? - Answer
thin myofilaments
Voltage gated Na+ and K+ channels are associated most directly with what event during
stimulation of a muscle fiber? - Answer propagating the action potential along the
sarcolemma
What occurs last among the events that trigger cross bridge formation? - Answer bind of Ca+
to troponin
, Increased contractile force due to recruitment results from _______. - Answer stimulation of a
muscle by increasing numbers of activated somatic motor neurons
What is expected to occur during the recovery period following strenuous exercise? - Answer
glycogen is formed from glucose
What explains the decreased contractile force generated by a stretched muscle? - Answer
Stretching of myofibrils within the muscle fibers decreases the overlap between thin and thick
myofilaments
Which of the following is not a characteristic of fast glycolytic fibers?
- depends on blood delivered nutrients
- relatively large fiber diameter
- white appearance
- powerful contractions by quick to fatigue - Answer depends on blood delivered nutrients
What statement describes a similarity between smooth muscle and skeletal muscle? - Answer
Both smooth muscle and skeletal muscle contain thin and thick myofilaments
The connective tissue covering that encloses the sarcolemma of an individual muscle fiber is
called the ________. - Answer endomysium
A fascicle is a _______. - Answer bundle of muscle fibers enclosed by a connective tissue
sheath
Contains actin - Answer thin
contains ATPases - Answer thick
attached to the z disc - Answer thin
contains myosin - Answer thick
