KINE 433 Exam 2 questions with verified answers
Ans✓✓ -
what type(s) of muscle are controlled by the autonomic nervous system? Ans✓✓
-smooth and cardiac muscle
what type(s) of muscle are controlled by the central nervous system? Ans✓✓ -
skeletal muscle
what connects muscle to bone? Ans✓✓ -tendons
what is the connective tissue that surrounds the entire muscle? Ans✓✓ -
epimysium
what is the connective tissue that surrounds an individual muscle fiber? Ans✓✓ -
endomysium
what is the connective tissue that surrounds a bundle of muscle fibers? Ans✓✓ -
perimysium
what is a bunch of muscle fibers called? Ans✓✓ -fasciculus
what is the diameter range of a skeletal muscle fiber? Ans✓✓ -10-120
micrometers
VERY BIG! Human hair is 150 micrometers in diameter
, what are two unique traits about muscle fibers? Ans✓✓ -1. they are much larger
than most cells
2. they are multi-nucleated and have many more nuclei than other cells
what part of the muscle cell produces ATP? Ans✓✓ -mitochondria
what is the contractile element of a muscle cell composed of thick and thin fibers?
Ans✓✓ -myofibril
what is the membrane surrounding a muscle fiber that conducts action potentials?
Ans✓✓ -plasmalemma
what is the intracellular fluid containing glycogen and myoglobin called in a
muscle cell? Ans✓✓ -sarcoplasm (cytoplasm)
what is the main storage unit for Ca++ in a muscle cell? Ans✓✓ -sarcoplasmic
reticulum
what is muscle contraction dependent on? Ans✓✓ -Ca++
what are the extensions of the plasmalemma that transmit action potentials to
individual fibers called? Ans✓✓ -transverse tubules
what is important about the transverse tubules? Ans✓✓ -they are important for
contraction, because they allow the action potential to transmit THROUGH the cell
what is the sarcomere? Ans✓✓ -the functional unit of a myofibril
Ans✓✓ -
what type(s) of muscle are controlled by the autonomic nervous system? Ans✓✓
-smooth and cardiac muscle
what type(s) of muscle are controlled by the central nervous system? Ans✓✓ -
skeletal muscle
what connects muscle to bone? Ans✓✓ -tendons
what is the connective tissue that surrounds the entire muscle? Ans✓✓ -
epimysium
what is the connective tissue that surrounds an individual muscle fiber? Ans✓✓ -
endomysium
what is the connective tissue that surrounds a bundle of muscle fibers? Ans✓✓ -
perimysium
what is a bunch of muscle fibers called? Ans✓✓ -fasciculus
what is the diameter range of a skeletal muscle fiber? Ans✓✓ -10-120
micrometers
VERY BIG! Human hair is 150 micrometers in diameter
, what are two unique traits about muscle fibers? Ans✓✓ -1. they are much larger
than most cells
2. they are multi-nucleated and have many more nuclei than other cells
what part of the muscle cell produces ATP? Ans✓✓ -mitochondria
what is the contractile element of a muscle cell composed of thick and thin fibers?
Ans✓✓ -myofibril
what is the membrane surrounding a muscle fiber that conducts action potentials?
Ans✓✓ -plasmalemma
what is the intracellular fluid containing glycogen and myoglobin called in a
muscle cell? Ans✓✓ -sarcoplasm (cytoplasm)
what is the main storage unit for Ca++ in a muscle cell? Ans✓✓ -sarcoplasmic
reticulum
what is muscle contraction dependent on? Ans✓✓ -Ca++
what are the extensions of the plasmalemma that transmit action potentials to
individual fibers called? Ans✓✓ -transverse tubules
what is important about the transverse tubules? Ans✓✓ -they are important for
contraction, because they allow the action potential to transmit THROUGH the cell
what is the sarcomere? Ans✓✓ -the functional unit of a myofibril
