Question 1

Mitochondrial activity in skeletal muscle cells are usually efficient,but can have limited ATP production if

Accepted Answer

Limited availability of O₂ (oxygen) can lead to limited ATP production in skeletal muscle cells, as oxygen is required for efficient oxidative phosphorylation in the mitochondria. Accumulation of pyruvic acid or production of CO₂ as a waste product are not directly related to mitochondrial efficiency or ATP production.

Question 2

What is the result of acetylcholine attaching to the ligand gates of the motor end plate?

Accepted Answer

Acetylcholine attaching to the ligand gates of the motor end plate results in an increase in permeability to sodium. This allows sodium ions to flow into the muscle cell, which leads to depolarization and ultimately muscle contraction.

Question 3

After prolonged strenuous exercise has stopped,heavy breathing will often continue for several minutes in order to provide the oxygen needed to

Accepted Answer

After strenuous exercise, heavy breathing continues to supply oxygen for multiple recovery processes: converting lactic acid back into glycogen, resynthesizing creatine phosphate, and replenishing oxygen in muscle myoglobin.

Question 4

The drug dantrolene inhibits release of calcium into the sarcoplasm.Dantrolene affects the ____ _____.

Accepted Answer

The answer of The drug dantrolene inhibits release of calcium...

Question 5

Writer's cramp can occur in Anatomy and Physiology lecture class.What factor would most likely contribute to the muscles not being able to relax?

Accepted Answer

Writer's cramp is a type of dystonia, a movement disorder caused by abnormal muscle contractions. In this case, the muscles in the hand and forearm become overactive and contract involuntarily, leading to pain and difficulty with writing. The main factor contributing to this is a deficit of ATP, which keeps the myosin heads attached to actin filaments and prevents the muscles from relaxing. This can be caused by a variety of factors, including overuse, fatigue, and stress. The other options listed do not directly contribute to muscle contraction or relaxation in the same way.

Question 6

Which type of muscle tissue is capable of undergoing the stress-relaxation response when stretched?

Accepted Answer

Single-unit smooth muscle fibers are capable of undergoing the stress-relaxation response when stretched. This is due to their ability to maintain tension for prolonged periods of time without fatiguing, allowing them to adapt to changes in length without further tension buildup.

Question 7

Which statement explains the sarcomere appearance change during a muscle contraction?

Accepted Answer

The answer of Which statement explains the sarcomere appearance change...

Question 8

The zone of overlap increases during the

Accepted Answer

The zone of overlap refers to the area where the thin filaments of actin overlap with the thick filaments of myosin. This overlap occurs during the contraction period when the myosin heads bind to the actin and pull the thin filaments towards the center of the sarcomere, shortening the muscle fiber. Therefore, the zone of overlap increases during the contraction period.

Question 9

An action potential depolarizes the synaptic end bulb,which causes openings of _____.The influx of _______ causes exocytosis of _______.The neurotransmitter attaches to _________.Opening of the channel allows an influx of _____________.
Drop down choices (in correct order)
Acetylcholine
Calcium ions
Ligand gates
Sodium ions
Voltage gates
Voltage gates
Ligand gates
Sodium ions

Accepted Answer

The answer of An action potential depolarizes the synaptic end...

Question 10

Muscle damage can be indicated by…

Accepted Answer

Myoglobin is a protein found in muscle tissue, and its presence in the blood can indicate muscle damage, as it is released into the bloodstream when muscle cells are damaged.

Question 11

Which age group would be most susceptible to an increase in slow oxidative muscle fibers?

Accepted Answer

Slow oxidative muscle fibers increase with age due to a decrease in fast-twitch fibers and an increase in endurance activities, which are more common as people age beyond 30.

Question 12

Match the terms to their actions.
Which of the following wraps around groups of muscles?
_________:wraps around groups of muscles
_________:encircles muscle
_________:encircles fascicles
_________:separates muscle fibers
Drop Down Choices:
Endomysium
Epimysium
Fascia
Perimysium

Accepted Answer

The answer of Match the terms to their actions.
Which of...

Question 13

When an athlete is preparing to perform a pull up,they hang from the bar.At this point,they are performing what type of contractions?

Accepted Answer

When an athlete is hanging from the bar, they are not moving, which means there is no change in muscle length. Therefore, they are performing an isometric contraction.

Question 14

Discuss the steps involved in contraction of smooth muscle and explain why smooth muscle has a slower contraction cycle.

Accepted Answer

The answer of Discuss the steps involved in contraction of...

Question 15

Strength training would result in

Accepted Answer

Strength training leads to hypertrophy of fast oxidative-glycolytic fibers, which are the most responsive to this type of training. Atrophy refers to a decrease in muscle size, which is not desirable in strength training. Hyperplasia, or an increase in the number of muscle fibers, is not proven to occur significantly in response to strength training. Conversion of slow oxidative fibers to fast oxidative-glycolytic fibers may occur to some extent, but it is not the primary outcome of strength training.

Question 16

The relaxation phase of a muscle contraction is often prolonged in a fatigued muscle,raising the likelihood of fused summation of action potentials causing painful disturbances to a skeletal muscle.What disturbance is being described?

Accepted Answer

The disturbance being described is a cramp, which is a painful, involuntary contraction of a muscle that can occur when muscles are fatigued. The prolonged relaxation phase in a fatigued muscle increases the chance of fused summation of action potentials, leading to these involuntary contractions.

Question 17

In a neuromuscular junction,the effect of acetylcholine (ACh)binding to receptors on the motor end plate lasts only briefly due to

Accepted Answer

The effect of ACh binding to receptors on the motor end plate lasts only briefly because it is rapidly destroyed in the synaptic cleft by acetylcholinesterase, which breaks it down into acetate and choline. This allows for precise control of muscle contraction and prevents overstimulation of the muscle.

Question 18

)Cross bridges are formed during muscle contraction when _____ binds to _____.

Accepted Answer

Cross bridges are formed between the myosin heads and actin filaments during muscle contraction. Myosin binds to actin to form the cross bridges which pull the actin filaments towards the center of the sarcomere. Troponin and tropomyosin are regulatory proteins that control the interaction between actin and myosin by blocking or exposing the binding sites on actin. Therefore, neither A, B, D, nor E is correct.

Question 19

Myasthenia Gravis is an autoimmune disorder that targets the ACh receptors at the NMJ and ultimately reduces the number of available receptors.Predict what happens if you treat the patient with a drug that inhibits the activity of acetylcholinesterase?

Accepted Answer

Inhibiting acetylcholinesterase will increase the duration of acetylcholine activity at the NMJ, thus increasing the likelihood of interaction with remaining ACh receptors. This will increase the strength of the contraction and potentially improve muscle weakness associated with myasthenia gravis.

Question 20

Lidocain inhibits the ion movement required to initiate and conduct impulses on a muscle cell.What area does lidocaine affect (place your answer in the box below)?

Accepted Answer

The answer of Lidocain inhibits the ion movement required to...

Quiz 10: Muscular Tissue

Mitochondrial activity in skeletal muscle cells are usually efficient,but can have limited ATP production if

What is the result of acetylcholine attaching to the ligand gates of the motor end plate?

After prolonged strenuous exercise has stopped,heavy breathing will often continue for several minutes in order to provide the oxygen needed to

The drug dantrolene inhibits release of calcium into the sarcoplasm.Dantrolene affects the _.

Writer's cramp can occur in Anatomy and Physiology lecture class.What factor would most likely contribute to the muscles not being able to relax?

Which type of muscle tissue is capable of undergoing the stress-relaxation response when stretched?

Which statement explains the sarcomere appearance change during a muscle contraction?

The zone of overlap increases during the

Muscle damage can be indicated by…

Which age group would be most susceptible to an increase in slow oxidative muscle fibers?

Match the terms to their actions. Which of the following wraps around groups of muscles? _____:wraps around groups of muscles _:encircles muscle _:encircles fascicles _____:separates muscle fibers Drop Down Choices: Endomysium Epimysium Fascia Perimysium

When an athlete is preparing to perform a pull up,they hang from the bar.At this point,they are performing what type of contractions?

Discuss the steps involved in contraction of smooth muscle and explain why smooth muscle has a slower contraction cycle.

Strength training would result in

The relaxation phase of a muscle contraction is often prolonged in a fatigued muscle,raising the likelihood of fused summation of action potentials causing painful disturbances to a skeletal muscle.What disturbance is being described?

In a neuromuscular junction,the effect of acetylcholine (ACh) binding to receptors on the motor end plate lasts only briefly due to

) Cross bridges are formed during muscle contraction when _ binds to _.

Myasthenia Gravis is an autoimmune disorder that targets the ACh receptors at the NMJ and ultimately reduces the number of available receptors.Predict what happens if you treat the patient with a drug that inhibits the activity of acetylcholinesterase?

Lidocain inhibits the ion movement required to initiate and conduct impulses on a muscle cell.What area does lidocaine affect (place your answer in the box below)?

Quiz 10: Muscular Tissue

Mitochondrial activity in skeletal muscle cells are usually efficient,but can have limited ATP production if

What is the result of acetylcholine attaching to the ligand gates of the motor end plate?

After prolonged strenuous exercise has stopped,heavy breathing will often continue for several minutes in order to provide the oxygen needed to

The drug dantrolene inhibits release of calcium into the sarcoplasm.Dantrolene affects the ____ _____.

Writer's cramp can occur in Anatomy and Physiology lecture class.What factor would most likely contribute to the muscles not being able to relax?

Which type of muscle tissue is capable of undergoing the stress-relaxation response when stretched?

Which statement explains the sarcomere appearance change during a muscle contraction?

The zone of overlap increases during the

Muscle damage can be indicated by…

Which age group would be most susceptible to an increase in slow oxidative muscle fibers?

Match the terms to their actions. Which of the following wraps around groups of muscles? _________:wraps around groups of muscles _________:encircles muscle _________:encircles fascicles _________:separates muscle fibers Drop Down Choices: Endomysium Epimysium Fascia Perimysium

When an athlete is preparing to perform a pull up,they hang from the bar.At this point,they are performing what type of contractions?

Discuss the steps involved in contraction of smooth muscle and explain why smooth muscle has a slower contraction cycle.

Strength training would result in

The relaxation phase of a muscle contraction is often prolonged in a fatigued muscle,raising the likelihood of fused summation of action potentials causing painful disturbances to a skeletal muscle.What disturbance is being described?

In a neuromuscular junction,the effect of acetylcholine (ACh) binding to receptors on the motor end plate lasts only briefly due to

) Cross bridges are formed during muscle contraction when _____ binds to _____.

Myasthenia Gravis is an autoimmune disorder that targets the ACh receptors at the NMJ and ultimately reduces the number of available receptors.Predict what happens if you treat the patient with a drug that inhibits the activity of acetylcholinesterase?

Lidocain inhibits the ion movement required to initiate and conduct impulses on a muscle cell.What area does lidocaine affect (place your answer in the box below)?

The drug dantrolene inhibits release of calcium into the sarcoplasm.Dantrolene affects the _.

Match the terms to their actions. Which of the following wraps around groups of muscles? _____:wraps around groups of muscles _:encircles muscle _:encircles fascicles _____:separates muscle fibers Drop Down Choices: Endomysium Epimysium Fascia Perimysium

) Cross bridges are formed during muscle contraction when _ binds to _.