Question 1

What energizes the myosin head?

Accepted Answer

A) the actin filaments 
B) calcium ions 
C) potassium ions 
D) ATP hydrolysis reaction 
E) ADP synthesis 
A) the actin filaments 
B) calcium ions 
C) potassium ions 
D) ATP hydrolysis reaction 
E) ADP synthesis

Question 2

What type of tendon is formed when the connective tissue elements of a skeletal muscle extend as a broad flat layer?

Accepted Answer

A) perimysium 
B) deep fascia 
C) fascicle 
D) aponeurosis 
E) endomysium 
A) perimysium 
B) deep fascia 
C) fascicle 
D) aponeurosis 
E) endomysium

Question 3

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

A) prevent contraction 
B) weak contraction 
C) normal contraction 
D) cause spasm 
E) none of these choices 
A) prevent contraction 
B) weak contraction 
C) normal contraction 
D) cause spasm 
E) none of these choices

Question 4

On the diagram,where is the outer most layer of connective tissue encircling the entire muscle

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 5

Which of the regions of a sarcomere contain titin?

Accepted Answer

A) the A band only 
B) the H zone only 
C) the zone of overlap only 
D) from M line to Z disc 
E) the I band only 
A) the A band only 
B) the H zone only 
C) the zone of overlap only 
D) from M line to Z disc 
E) the I band only

Question 6

In an isometric contraction the muscle develops tension but does not

Accepted Answer

A) lengthen. 
B) widen. 
C) does not expend energy. 
D) conduct electrical current. 
E) exhibit elasticity. 
A) lengthen. 
B) widen. 
C) does not expend energy. 
D) conduct electrical current. 
E) exhibit elasticity.

Question 7

What is being shown by the axis labeled E?

Accepted Answer

A) time 
B) tetanus 
C) force of contraction 
D) twitch factor 
E) wave summation 
A) time 
B) tetanus 
C) force of contraction 
D) twitch factor 
E) wave summation

Question 8

In skeletal muscles,the combined amounts of creatine phosphate and ATP provide enough energy for the muscle to contract maximally for approximately

Accepted Answer

A) 15 seconds. 
B) 15 minutes. 
C) 1)5 minutes. 
D) 5 seconds. 
E) one minute. 
A) 15 seconds. 
B) 15 minutes. 
C) 1)5 minutes. 
D) 5 seconds. 
E) one minute.

Question 9

Which of the following is a common effect of aging on skeletal muscle?

Accepted Answer

A) loss of muscle mass 
B) decrease in maximal strength 
C) a slowing of muscle reflexes 
D) loss of flexibility 
E) all of these are correct 
A) loss of muscle mass 
B) decrease in maximal strength 
C) a slowing of muscle reflexes 
D) loss of flexibility 
E) all of these are correct

Question 10

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

Accepted Answer

A) rapid uptake of the ACh into the myofiber. 
B) endocytosis of the ACh receptor into the myofiber. 
C) rapid destruction of ACh in the synaptic cleft by acetylcholinesterase. 
D) rapid destruction of ACh in the synaptic cleft by monoamine oxidase. 
E) diffusion of the ACh out of the synaptic cleft. 
A) rapid uptake of the ACh into the myofiber. 
B) endocytosis of the ACh receptor into the myofiber. 
C) rapid destruction of ACh in the synaptic cleft by acetylcholinesterase. 
D) rapid destruction of ACh in the synaptic cleft by monoamine oxidase. 
E) diffusion of the ACh out of the synaptic cleft.

Question 11

Release of calcium from these structures triggers skeletal muscle contraction.

Accepted Answer

A) myofibrils 
B) mitochondria 
C) terminal cisterns of sarcoplasmic reticulum 
D) T-tubules 
E) none of the answer choices 
A) myofibrils 
B) mitochondria 
C) terminal cisterns of sarcoplasmic reticulum 
D) T-tubules 
E) none of the answer choices

Question 12

Which figure exhibits isometric contraction of the biceps brachii muscle?

Accepted Answer

A) A 
B) B 
C) C 
D) none of these choices 
A) A 
B) B 
C) C 
D) none of these choices

Question 13

In the diagram,where are thick filaments found?

Accepted Answer

A) C 
B) E 
C) A 
D) B 
E) All of these choices 
A) C 
B) E 
C) A 
D) B 
E) All of these choices

Question 14

Which of the following disorders is characterized by the wasting away of muscles due to the progressive loss of myofibrils?

Accepted Answer

A) muscular hypertrophy 
B) muscular atrophy 
C) fibromyalgia 
D) myasthenia gravis 
E) tremors 
A) muscular hypertrophy 
B) muscular atrophy 
C) fibromyalgia 
D) myasthenia gravis 
E) tremors

Question 15

Which of the following correctly lists the sequence of structures that action potentials must move through to excite skeletal muscle contraction?

Accepted Answer

A) sarcolemma,axon of neuron,T tubules 
B) T tubules,sarcolemma,myofilament 
C) muscle fiber,axon of neuron,myofibrils 
D) axon of neuron,sarcolemma,T tubules 
E) myofibrils,myofilaments,mitochondria 
A) sarcolemma,axon of neuron,T tubules 
B) T tubules,sarcolemma,myofilament 
C) muscle fiber,axon of neuron,myofibrils 
D) axon of neuron,sarcolemma,T tubules 
E) myofibrils,myofilaments,mitochondria

Question 16

How does a nerve impulse elicit a muscle action potential?

Accepted Answer

A nerve impulse reaches the synaptic end

Question 17

Which of the following are commonly used to produce ATP during skeletal muscle contraction?

Accepted Answer

A) creatine phosphate 
B) anaerobic cellular respiration 
C) aerobic cellular respiration 
D) All of these choices are correct. 
E) None of these choices are correct. 
A) creatine phosphate 
B) anaerobic cellular respiration 
C) aerobic cellular respiration 
D) All of these choices are correct. 
E) None of these choices are correct.

Question 18

List the four steps of the contraction cycle in order of occurrence.What is needed for these steps to continuously repeat?

Accepted Answer

ATP hydrolysis,attachment of m

Question 19

Describe the factors that lead to muscle fatigue.

Accepted Answer

Although the precise mechanisms that cau

Question 20

What regulatory proteins can be found in the thin filaments of skeletal muscle fibers?

Accepted Answer

A) troponin and titin 
B) tropomyosin and troponin 
C) myosin and titin 
D) titin and tropomyosin 
E) tropomyosin and myosin 
A) troponin and titin 
B) tropomyosin and troponin 
C) myosin and titin 
D) titin and tropomyosin 
E) tropomyosin and myosin

Exam 10: Muscle Tissue

What energizes the myosin head?

What type of tendon is formed when the connective tissue elements of a skeletal muscle extend as a broad flat layer?

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?

On the diagram,where is the outer most layer of connective tissue encircling the entire muscle

Which of the regions of a sarcomere contain titin?

In an isometric contraction the muscle develops tension but does not

What is being shown by the axis labeled E?

In skeletal muscles,the combined amounts of creatine phosphate and ATP provide enough energy for the muscle to contract maximally for approximately

Which of the following is a common effect of aging on skeletal muscle?

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

Release of calcium from these structures triggers skeletal muscle contraction.

Which figure exhibits isometric contraction of the biceps brachii muscle?

In the diagram,where are thick filaments found?

Which of the following disorders is characterized by the wasting away of muscles due to the progressive loss of myofibrils?

Which of the following correctly lists the sequence of structures that action potentials must move through to excite skeletal muscle contraction?

How does a nerve impulse elicit a muscle action potential?

Which of the following are commonly used to produce ATP during skeletal muscle contraction?

List the four steps of the contraction cycle in order of occurrence.What is needed for these steps to continuously repeat?

Describe the factors that lead to muscle fatigue.

What regulatory proteins can be found in the thin filaments of skeletal muscle fibers?

An Introduction to the Human Body

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System Unit Ii: Principles of Support and Movement

The Skeletal System: Bone Tissue

The Skeletal System: the Axial Skeleton

The Skeletal System: the Appendicular Skeleton

Joints

The Muscular System Unit Iii: Control Systems of the Human Body

Nervous Tissue

The Spinal Cord and Spinal Nerves

The Brain and Cranial Nerves

The Autonomic Nervous System

Sensory, Motor and Integrative Systems

The Special Senses

The Endocrine System Unit Iv: Maintenance of the Human Body

The Cardiovascular System: the Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels and Hemodynamics

The Lymphatic System, Nonspecific Resistance to Disease, and Immunity

The Respiratory System

The Digestive System

Metabolism

The Urinary System

Fluid, Electrolyte, and Acid-Base Homeostasis Unit V: Continuity

The Reproductive Systems

Development and Inheritance

Filters