UTA Exam 3 A&P 1 - Frederick Questions And
Answers 100% Solved
Isotonic Contraction skeletal muscle changes length, resulting in motion
Epimysium exterior collagen layer, connected to deep fascia, separates muscle from
surrounding tissues
Plasticity the ability of smooth muscle to function over a wide range of lengths
Twitch a single neural stimulation produces a single contraction
Fast Fiber Characteristics large diameter, large glycogen reserves and few mitochondria
Which fibers are most resistant to fatigue? Slow
In the Cori Cycle what does the liver produce glucose from? Lactic Acid to pyruvic acid
to glucose to glycogen
, UTA Exam 3 A&P 1 - Frederick Questions And
Answers 100% Solved
What is the function of creatine phosphate? storage molecule for excess ATP energy in
resting muscle
Contraction Cycle 1.Exposure of active sites
2.Formation of Cross-Bridges
3. Pivoting of myosin heads
4. Detachment of Cross-Bridges
5. Reactivation of myosin
Excitation-Contraction Coupling 1. Release of CA2+ from sarcoplasmic reticulum
2. CA2+ trigger interactions between thick and thin filaments
3. Muscle fibers contract, consume ATP
4. Produces active tension
What is a triad composed of? Formed by 1 T tubule & 2 terminal cisternae
Neuromuscular Junction 1. Neural stimulation of muscle
, UTA Exam 3 A&P 1 - Frederick Questions And
Answers 100% Solved
2. Release of acetylcholine
3. ACh binding at the motor end plate
4. Appearance of an action potential in the sarcolemma
5. Return to initial state
Advantage to having many nuclei in one muscle cell? The ability to produce large
amounts of the enzyme and structural protein needed for contraction
What triggers action potential in the muscle cell? an increase in Na+ in sarcolemma
travels along the T-tubules, leads to excitation-contraction coupling
What is the function of acetylcholine? it is a neurotransmitter that is often associated with
the activation of muscles but is also involved in the cholinergic system which often results in
inhibitory actions
Where do these molecules attach? sarcoplasm reticulum- receptors are found on the
surface of muscle cells, concentrated in the synapse between nerve cells and muscle cells
, UTA Exam 3 A&P 1 - Frederick Questions And
Answers 100% Solved
What would happen if the receptors for acetylcholine were blocked? the neurotransmitter
is not able to act on the receptor. Most if the time the neurotransmitter will then be taken back up
by the neuron that released it, in a process known as reuptake.
Where are the receptors for acetylcholine located? on the surface of the sarcolemma at
the motor end plate
What is the consequence if there is no acetylcholinesterase? The muscle will move
uncontrollably
What is acetylcholinesterase function? this enzyme breaks down acetylcholine and
prevents the generation of multiple action potentials from a single nerve impulse
How are muscle cells different than regular body cells? muscle cells are long and
multinucleinate
What does the sarcoplasm reticulum release in response to action potential? Calcium ions
during muscle contraction and releases them during relaxation
Answers 100% Solved
Isotonic Contraction skeletal muscle changes length, resulting in motion
Epimysium exterior collagen layer, connected to deep fascia, separates muscle from
surrounding tissues
Plasticity the ability of smooth muscle to function over a wide range of lengths
Twitch a single neural stimulation produces a single contraction
Fast Fiber Characteristics large diameter, large glycogen reserves and few mitochondria
Which fibers are most resistant to fatigue? Slow
In the Cori Cycle what does the liver produce glucose from? Lactic Acid to pyruvic acid
to glucose to glycogen
, UTA Exam 3 A&P 1 - Frederick Questions And
Answers 100% Solved
What is the function of creatine phosphate? storage molecule for excess ATP energy in
resting muscle
Contraction Cycle 1.Exposure of active sites
2.Formation of Cross-Bridges
3. Pivoting of myosin heads
4. Detachment of Cross-Bridges
5. Reactivation of myosin
Excitation-Contraction Coupling 1. Release of CA2+ from sarcoplasmic reticulum
2. CA2+ trigger interactions between thick and thin filaments
3. Muscle fibers contract, consume ATP
4. Produces active tension
What is a triad composed of? Formed by 1 T tubule & 2 terminal cisternae
Neuromuscular Junction 1. Neural stimulation of muscle
, UTA Exam 3 A&P 1 - Frederick Questions And
Answers 100% Solved
2. Release of acetylcholine
3. ACh binding at the motor end plate
4. Appearance of an action potential in the sarcolemma
5. Return to initial state
Advantage to having many nuclei in one muscle cell? The ability to produce large
amounts of the enzyme and structural protein needed for contraction
What triggers action potential in the muscle cell? an increase in Na+ in sarcolemma
travels along the T-tubules, leads to excitation-contraction coupling
What is the function of acetylcholine? it is a neurotransmitter that is often associated with
the activation of muscles but is also involved in the cholinergic system which often results in
inhibitory actions
Where do these molecules attach? sarcoplasm reticulum- receptors are found on the
surface of muscle cells, concentrated in the synapse between nerve cells and muscle cells
, UTA Exam 3 A&P 1 - Frederick Questions And
Answers 100% Solved
What would happen if the receptors for acetylcholine were blocked? the neurotransmitter
is not able to act on the receptor. Most if the time the neurotransmitter will then be taken back up
by the neuron that released it, in a process known as reuptake.
Where are the receptors for acetylcholine located? on the surface of the sarcolemma at
the motor end plate
What is the consequence if there is no acetylcholinesterase? The muscle will move
uncontrollably
What is acetylcholinesterase function? this enzyme breaks down acetylcholine and
prevents the generation of multiple action potentials from a single nerve impulse
How are muscle cells different than regular body cells? muscle cells are long and
multinucleinate
What does the sarcoplasm reticulum release in response to action potential? Calcium ions
during muscle contraction and releases them during relaxation
