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BIO Ch. 9 quizzes
Terms in this set (36)
A muscle cell is also called a :
The folded area of the sarcolemma at the NMJ is called:
Thick filaments are composed mainly of:
The connective tissue wrapping of a single muscle cell is called:
to release, store, and regulate Calcium ion release in a muscle cell
The function of the sarcoplasmic reticulum is:
The chemical released from the axon terminal at the NMJ is:
only think filaments
The I band in a skeletal muscle myofibril contains:
using mostly Slow Oxidative muscle fiber motor units
using mostly Fast Glycolytic muscle fiber motor units
intermediate strength contraction
using both types of muscle fiber motor units
to bind with troponin, causing tropomyosin to move off the binding sites on actin
The role of the Calcium released from the SR it to:
The voltage that exists across the plasma membrane of a cell during the resting state is referred to as the _____.
Rigor mortis occurs due to lack of _____.
thin and thick filaments sliding past each other
The 'sliding filament theory' states that muscle shortens by:
In a skeletal muscle cell the action potential causes release of Calcium from the _____.
Muscles can contract strongly or lightly, such as when lifting a heavy weight versus a feather. One mechanism for this is modifying how many muscle fibers are used. This is referred to as _____.
In a muscle cell the change of a resting membrane potential of- 90 mv to a less negative value, such as -30 mv, would be referred to as a :
blocking Ach release from the motor axon
Botox treatment for wrinkles relaxes muscle by:
T/F: If the nerve supplying a muscle is cut the muscle will deteriorate
Increasing tension due to heat generation and increased efficiency of the enzymes during the first few contractions of a muscle is called the _____ effect.
At the NMJ acetylcholine causes the initial depolarization by opening of ion channels in the sarcolemma that lead to net flow of Na ion ____ the muscle cell.
A sufficiently large depolarization of the sarcolemma at the motor end plate at the NMJ leads to an _____ that spreads along the entire sarcolemma and into T-tubules.
Attempting to lift a very heavy item, such as a 2 ton vehicle, would be an example of a _____ contraction of the muscles.
Chemically-gated ion channels are opened by a ____, such as Ach at the neuromuscular junction.
Increasing the frequency of stimulation of a muscle can lead to increased muscle tension, a concept called ______ summation.
A muscle that is overstretched generates:
muscle length changes, and tension constant
muscle length constant, and tension changes
The type of muscle fibers most fatigue resistant are the ____ type of fiber.
increased myoglobin synthesis, increase in number of mitochondria, increase number of muscle capillaries
Aerobic/endurance exercise training leads to:
white, fast contraction, produces lactic acid, using anaerobic glycolysis
In describing types of muscle cells based on metabolic pathways for generating ATP, speed of contraction, and color which is true fo FG gibers:
During rest and light exercise which ATP production pathway produces most of the ATP (aerobic or anaerobic?)
During exercise the fastest way to generate ATP after the stored ATP is used up involves:
The type of muscle found in walls of most hollow organs is ____ muscle.
Tearing or excessive overstretching of a muscle is referred to as a :
The Oxygen needed for aerobic pathways is delivered by the blood, but also is stored bound to ____ in muscle cells.
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