Question 1

The chemical transmitter at the neuromuscular junction is

Accepted Answer

A)  calcium 
B)  cholinesterase 
C)  acetylcholine 
D)  adrenaline 
A)  calcium 
B)  cholinesterase 
C)  acetylcholine 
D)  adrenaline

Question 2

The muscle fibers of a skeletal muscle are arranged in small groups or bundles called

Accepted Answer

A)  motor units 
B)  fasciculi 
C)  sarcomeres 
D)  myofibrils 
E)  synergists 
A)  motor units 
B)  fasciculi 
C)  sarcomeres 
D)  myofibrils 
E)  synergists

Question 3

The ability of muscle tissue to shorten or decrease in length is called

Accepted Answer

A)  excitability 
B)  elasticity 
C)  contractility 
D)  extensibility 
E)  irritability 
A)  excitability 
B)  elasticity 
C)  contractility 
D)  extensibility 
E)  irritability

Question 4

The muscle over the shoulder that abducts the arm is the

Accepted Answer

A)  brachialis 
B)  biceps brachii 
C)  deltoid 
D)  trapezius 
E)  triceps brachii 
A)  brachialis 
B)  biceps brachii 
C)  deltoid 
D)  trapezius 
E)  triceps brachii

Question 5

A motor unit is

Accepted Answer

A)  a fascicle of muscle fibers 
B)  a whole muscle plus all the nerve fibers that innervate it 
C)  capable of a graded response 
D)  a single motor neuron and all the muscle fibers it innervates 
E)  all the muscle fibers required to perform a specific action 
A)  a fascicle of muscle fibers 
B)  a whole muscle plus all the nerve fibers that innervate it 
C)  capable of a graded response 
D)  a single motor neuron and all the muscle fibers it innervates 
E)  all the muscle fibers required to perform a specific action

Question 6

Which of the following is INCORRECT about myofilaments?

Accepted Answer

A)  Myofilaments are composed of the proteins actin and myosin. 
B)  Thick myofilaments are composed of myosin. 
C)  Actin and myosin decrease in length during muscle contraction. 
D)  Thin myofilaments are composed of actin. 
E)  Myofilaments change position during muscle contraction. 
A)  Myofilaments are composed of the proteins actin and myosin. 
B)  Thick myofilaments are composed of myosin. 
C)  Actin and myosin decrease in length during muscle contraction. 
D)  Thin myofilaments are composed of actin. 
E)  Myofilaments change position during muscle contraction.

Question 7

A stimulus that exceeds threshold causes a greater than normal contraction of a muscle fiber.

Accepted Answer

A) True 
 B)False

Question 8

The neuromuscular junction

Accepted Answer

A)  is the region where a nerve penetrates a muscle fiber 
B)  is the region where the synaptic knob, or axon terminal, meets the sarcolemma 
C)  consists of the synaptic knob and synaptic cleft 
D)  is a thickened region on the sarcolemma where cholinesterase is produced 
A)  is the region where a nerve penetrates a muscle fiber 
B)  is the region where the synaptic knob, or axon terminal, meets the sarcolemma 
C)  consists of the synaptic knob and synaptic cleft 
D)  is a thickened region on the sarcolemma where cholinesterase is produced

Question 9

A skeletal muscle

Accepted Answer

A)  contracts spontaneously to maintain muscle tone 
B)  has to receive a stimulus from a motor neuron in order to contract 
C)  contracts automatically whether or not there is nerve stimulation 
D)  is capable of contracting automatically but contracts faster and more efficiently if there is a stimulus 
A)  contracts spontaneously to maintain muscle tone 
B)  has to receive a stimulus from a motor neuron in order to contract 
C)  contracts automatically whether or not there is nerve stimulation 
D)  is capable of contracting automatically but contracts faster and more efficiently if there is a stimulus

Question 10

Muscles that compress the abdominal wall include the

Accepted Answer

A)  erector spinae and diaphragm 
B)  diaphragm and external intercostals 
C)  rectus abdominis and diaphragm 
D)  internal oblique and rectus abdominis 
E)  diaphragm and transversus abdominis 
A)  erector spinae and diaphragm 
B)  diaphragm and external intercostals 
C)  rectus abdominis and diaphragm 
D)  internal oblique and rectus abdominis 
E)  diaphragm and transversus abdominis

Question 11

Sitting in the lotus position entails sitting with the legs crossed and each foot resting upon the thigh of the opposite leg with the soles of the feet upward.The movements necessary for this posture include:

Accepted Answer

A)  adduction at the hip, flexion at the knee, and eversion of the foot 
B)  flexion at the hip, extension at the knee, and dorsiflexion of the foot 
C)  abduction at the hip, flexion at the knee, and inversion of the foot 
D)  extension at the hip, extension at the knee, and inversion of the foot 
E)  extension at the hip, flexion at the knee, and plantar flexion of the foot 
A)  adduction at the hip, flexion at the knee, and eversion of the foot 
B)  flexion at the hip, extension at the knee, and dorsiflexion of the foot 
C)  abduction at the hip, flexion at the knee, and inversion of the foot 
D)  extension at the hip, extension at the knee, and inversion of the foot 
E)  extension at the hip, flexion at the knee, and plantar flexion of the foot

Question 12

All of the following are true about a contracting muscle fiber as compared to a relaxed muscle fiber EXCEPT the _____ in a contracting fiber.

Accepted Answer

A)  I bands are shorter 
B)  A bands are shorter 
C)  H zones are shorter 
D)  sarcomere is shorter 
E)  Z lines are closer together 
A)  I bands are shorter 
B)  A bands are shorter 
C)  H zones are shorter 
D)  sarcomere is shorter 
E)  Z lines are closer together

Question 13

What is the correct sequence for the following events at the neuromuscular junction?
1)Impulse travels along sarcolemma to the T-tubules.
2)Nerve impulse reaches axon terminal.
3)Neurotransmitter reacts with receptors on sarcolemma.
4)Neurotransmitter is released into synaptic cleft.

Accepted Answer

A)  1, 2, 4, 3 
B)  2, 4, 3, 1 
C)  2, 1, 4, 3 
D)  4, 3, 2, 1 
E)  3, 2, 4, 1 
A)  1, 2, 4, 3 
B)  2, 4, 3, 1 
C)  2, 1, 4, 3 
D)  4, 3, 2, 1 
E)  3, 2, 4, 1

Question 14

The minimum stimulus needed to cause contraction is a _____ stimulus.

Accepted Answer

A)  subliminal 
B)  subthreshold 
C)  contraction 
D)  threshold 
E)  maximal 
A)  subliminal 
B)  subthreshold 
C)  contraction 
D)  threshold 
E)  maximal

Question 15

A word that means "partition through a space" is

Accepted Answer

A)  actin 
B)  diaphragm 
C)  synergist 
D)  deltoid 
E)  tetany 
A)  actin 
B)  diaphragm 
C)  synergist 
D)  deltoid 
E)  tetany

Question 16

The number of muscle fibers in a motor unit is

Accepted Answer

A)  dependent on the size of the individual 
B)  fewer in muscles where precise control is needed 
C)  fewer in muscles that maintain posture 
D)  greater in muscles that move the fingers 
E)  the same for all muscles 
A)  dependent on the size of the individual 
B)  fewer in muscles where precise control is needed 
C)  fewer in muscles that maintain posture 
D)  greater in muscles that move the fingers 
E)  the same for all muscles

Question 17

Two muscles of mastication,or chewing,are the

Accepted Answer

A)  orbicularis oris and buccinator 
B)  masseter and temporalis 
C)  orbicularis oris and masseter 
D)  temporalis and buccinator 
E)  zygomaticus and orbicularis oris 
A)  orbicularis oris and buccinator 
B)  masseter and temporalis 
C)  orbicularis oris and masseter 
D)  temporalis and buccinator 
E)  zygomaticus and orbicularis oris

Question 18

The muscle group that flexes the leg at the knee is the

Accepted Answer

A)  quadriceps femoris 
B)  gluteus muscles 
C)  tibialis anterior 
D)  hamstrings 
E)  iliopsoas 
A)  quadriceps femoris 
B)  gluteus muscles 
C)  tibialis anterior 
D)  hamstrings 
E)  iliopsoas

Question 19

The origin of a skeletal muscle

Accepted Answer

A)  is the more stable end of attachment 
B)  causes movement when the muscle contracts 
C)  is a thin band of hyaline cartilage 
D)  is the endomysium 
E)  is attached to a bone by an aponeurosis 
A)  is the more stable end of attachment 
B)  causes movement when the muscle contracts 
C)  is a thin band of hyaline cartilage 
D)  is the endomysium 
E)  is attached to a bone by an aponeurosis

Question 20

What is the term for the neurotransmitter at the neuromuscular junction?

Accepted Answer

The answer of What is the term for the neurotransmitter...

The chemical transmitter at the neuromuscular junction is

The muscle fibers of a skeletal muscle are arranged in small groups or bundles called

The ability of muscle tissue to shorten or decrease in length is called

The muscle over the shoulder that abducts the arm is the

A motor unit is

Which of the following is INCORRECT about myofilaments?

A stimulus that exceeds threshold causes a greater than normal contraction of a muscle fiber.

The neuromuscular junction

A skeletal muscle

Muscles that compress the abdominal wall include the

Sitting in the lotus position entails sitting with the legs crossed and each foot resting upon the thigh of the opposite leg with the soles of the feet upward.The movements necessary for this posture include:

All of the following are true about a contracting muscle fiber as compared to a relaxed muscle fiber EXCEPT the _____ in a contracting fiber.

What is the correct sequence for the following events at the neuromuscular junction? 1)Impulse travels along sarcolemma to the T-tubules. 2)Nerve impulse reaches axon terminal. 3)Neurotransmitter reacts with receptors on sarcolemma. 4)Neurotransmitter is released into synaptic cleft.

The minimum stimulus needed to cause contraction is a _____ stimulus.

A word that means "partition through a space" is

The number of muscle fibers in a motor unit is

Two muscles of mastication,or chewing,are the

The muscle group that flexes the leg at the knee is the

The origin of a skeletal muscle

What is the term for the neurotransmitter at the neuromuscular junction?

Introduction to the Human Body

Chemistry, Matter, and Life

Cell Structure and Function

Tissues and Membranes

Integumentary System

Skeletal System

Nervous System

Sensory System

Endocrine System

Cardiovascular System: The Heart

Cardiovascular System: Blood Vessels

Cardiovascular System: Blood

Lymphatic System and Body Defense

Respiratory System

Digestive System

Metabolism and Nutrition

Urinary System and Body Fluids

Reproductive System

Development

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Exam 7: Muscular System

The chemical transmitter at the neuromuscular junction is

The muscle fibers of a skeletal muscle are arranged in small groups or bundles called

The ability of muscle tissue to shorten or decrease in length is called

The muscle over the shoulder that abducts the arm is the

A motor unit is

Which of the following is INCORRECT about myofilaments?

A stimulus that exceeds threshold causes a greater than normal contraction of a muscle fiber.

The neuromuscular junction

A skeletal muscle

Muscles that compress the abdominal wall include the

Sitting in the lotus position entails sitting with the legs crossed and each foot resting upon the thigh of the opposite leg with the soles of the feet upward.The movements necessary for this posture include:

All of the following are true about a contracting muscle fiber as compared to a relaxed muscle fiber EXCEPT the _____ in a contracting fiber.

What is the correct sequence for the following events at the neuromuscular junction? 1)Impulse travels along sarcolemma to the T-tubules. 2)Nerve impulse reaches axon terminal. 3)Neurotransmitter reacts with receptors on sarcolemma. 4)Neurotransmitter is released into synaptic cleft.

The minimum stimulus needed to cause contraction is a _____ stimulus.

A word that means "partition through a space" is

The number of muscle fibers in a motor unit is

Two muscles of mastication,or chewing,are the

The muscle group that flexes the leg at the knee is the

The origin of a skeletal muscle

What is the term for the neurotransmitter at the neuromuscular junction?

Introduction to the Human Body

Chemistry, Matter, and Life

Cell Structure and Function

Tissues and Membranes

Integumentary System

Skeletal System

Nervous System

Sensory System

Endocrine System

Cardiovascular System: The Heart

Cardiovascular System: Blood Vessels

Cardiovascular System: Blood

Lymphatic System and Body Defense

Respiratory System

Digestive System

Metabolism and Nutrition

Urinary System and Body Fluids

Reproductive System

Development

Filters