Question 1

An aponeurosis is .

Accepted Answer

A)  similar to a tendon in function 
B)  a structural part of the interior of muscle cells 
C)  a covering of the myoneural region 
D)  a disease of the neuromuscular junction 
A)  similar to a tendon in function 
B)  a structural part of the interior of muscle cells 
C)  a covering of the myoneural region 
D)  a disease of the neuromuscular junction A

Question 2

The function of the neuromuscular junction is to .

Accepted Answer

A)  convey a signal from the nervous system to skeletal muscle 
B)  stimulate or inhibit the activity of skeletal muscles 
C)  link nerve endings to muscle, to protect the nerve structurally 
D)  connect sensory neurons directly to muscle 
A)  convey a signal from the nervous system to skeletal muscle 
B)  stimulate or inhibit the activity of skeletal muscles 
C)  link nerve endings to muscle, to protect the nerve structurally 
D)  connect sensory neurons directly to muscle A

Question 3

This contractile protein is shaped like a golf club.

Accepted Answer

A)  troponin 
B)  myosin 
C)  tropomyosin 
D)  actin 
A)  troponin 
B)  myosin 
C)  tropomyosin 
D)  actin D

Question 4

The neuromuscular junction consists of .

Accepted Answer

A)  a nerve touching a muscle 
B)  a nerve coming into close proximity to a muscle fiber 
C)  the end branch of a single nerve fiber touching a muscle 
D)  the axon terminal coming into close proximity to a muscle fiber 
A)  a nerve touching a muscle 
B)  a nerve coming into close proximity to a muscle fiber 
C)  the end branch of a single nerve fiber touching a muscle 
D)  the axon terminal coming into close proximity to a muscle fiber

Question 5

What is the correct order of structures as you move from outside a muscle cell, to deep inside it?

Accepted Answer

A)  fiber, myofibril, myofilament 
B)  myofibril, myofilament, fiber 
C)  myofilament, myofibril, fiber 
D)  myofilament, fiber, myofibril 
A)  fiber, myofibril, myofilament 
B)  myofibril, myofilament, fiber 
C)  myofilament, myofibril, fiber 
D)  myofilament, fiber, myofibril

Question 6

This contractile protein forms the thin filaments.

Accepted Answer

A)  dystrophin 
B)  myosin 
C)  titin 
D)  actin 
A)  dystrophin 
B)  myosin 
C)  titin 
D)  actin

Question 7

Sarcomeres consist of _.

Accepted Answer

A)  a network of sarcoplasmic reticulum 
B)  bands of tissue wrapped around the sarcolemma 
C)  orderly arrangements of actin and myosin 
D)  myofibrils arranged one after the other 
A)  a network of sarcoplasmic reticulum 
B)  bands of tissue wrapped around the sarcolemma 
C)  orderly arrangements of actin and myosin 
D)  myofibrils arranged one after the other

Question 8

The dark band of skeletal muscle consists of .

Accepted Answer

A)  T tubules 
B)  only thick filaments 
C)  both thick and thin filaments 
D)  only thin filaments 
A)  T tubules 
B)  only thick filaments 
C)  both thick and thin filaments 
D)  only thin filaments

Question 9

From gross to microscopic, the parts of a muscle are .

Accepted Answer

A)  fiber, fascicle, muscle 
B)  muscle, fiber, fascicle 
C)  fascicle muscle, fiber 
D)  muscle, fascicle, fiber 
A)  fiber, fascicle, muscle 
B)  muscle, fiber, fascicle 
C)  fascicle muscle, fiber 
D)  muscle, fascicle, fiber

Question 10

This indentation of the sarcolemma carries electrical signals deep into the muscle cells.

Accepted Answer

A)  T tubule 
B)  terminal cisterns 
C)  triad 
D)  sarcoplasmic reticulum 
A)  T tubule 
B)  terminal cisterns 
C)  triad 
D)  sarcoplasmic reticulum

Question 11

Tendons differ from ligaments in that .

Accepted Answer

A)  tendons attach to bone and ligaments do not 
B)  tendons bind muscle to bone and ligaments bind bone to bone 
C)  they are formed from different tissue types 
D)  tendons are broad and flat and ligaments are like cords 
A)  tendons attach to bone and ligaments do not 
B)  tendons bind muscle to bone and ligaments bind bone to bone 
C)  they are formed from different tissue types 
D)  tendons are broad and flat and ligaments are like cords

Question 12

Terminal cisterns _.

Accepted Answer

A)  store acetylcholine 
B)  carry the action potential deep into the muscle cell 
C)  are made of smooth endoplasmic reticulum 
D)  are an important link between the nervous system and the muscle cell 
A)  store acetylcholine 
B)  carry the action potential deep into the muscle cell 
C)  are made of smooth endoplasmic reticulum 
D)  are an important link between the nervous system and the muscle cell

Question 13

The thick and thin filaments are made up of _, respectively.

Accepted Answer

A)  the dark and light bands 
B)  the H zone and the Z disc 
C)  T tubules and terminal cisterns 
D)  myosin and actin 
A)  the dark and light bands 
B)  the H zone and the Z disc 
C)  T tubules and terminal cisterns 
D)  myosin and actin

Question 14

At the neuromuscular junction, the electrical signal of the nerve .

Accepted Answer

A)  causes the axon terminal to release Na+ and K+ 
B)  stimulates formation of the neurotransmitter acetylcholine (ACh) 
C)  causes the axon terminal to release acetylcholine (ACh) 
D)  is sent directly to muscle 
A)  causes the axon terminal to release Na+ and K+ 
B)  stimulates formation of the neurotransmitter acetylcholine (ACh) 
C)  causes the axon terminal to release acetylcholine (ACh) 
D)  is sent directly to muscle

Question 15

This strong, cord-like structure attaches muscles to bones.

Accepted Answer

A)  ligament 
B)  tendon 
C)  deep fascia 
D)  myofibril 
A)  ligament 
B)  tendon 
C)  deep fascia 
D)  myofibril

Question 16

The actual contractile units of muscles extend from Z disc to Z disc. They are _.

Accepted Answer

A)  sarcoplasmic reticulum 
B)  thick filaments 
C)  sarcomeres 
D)  myofibrils 
A)  sarcoplasmic reticulum 
B)  thick filaments 
C)  sarcomeres 
D)  myofibrils

Question 17

A muscle fiber is _ .

Accepted Answer

A)  a rod-like structure consisting of sarcomeres placed end to end 
B)  an arrangement of actin and myosin filaments deep within a muscle cell 
C)  the elaborate arrangement of smooth endoplasmic reticulum inside a muscle cell 
D)  a muscle cell 
A)  a rod-like structure consisting of sarcomeres placed end to end 
B)  an arrangement of actin and myosin filaments deep within a muscle cell 
C)  the elaborate arrangement of smooth endoplasmic reticulum inside a muscle cell 
D)  a muscle cell

Question 18

Acetylcholine (ACh) is the neurotransmitter of axon terminals at the neuromuscular junction. It .

Accepted Answer

A)  binds to receptors on the muscle membrane 
B)  ultimately causes the motor neuron to depolarize 
C)  diffuses into the muscle cell 
D)  binds to receptors on the motor neuron 
A)  binds to receptors on the muscle membrane 
B)  ultimately causes the motor neuron to depolarize 
C)  diffuses into the muscle cell 
D)  binds to receptors on the motor neuron

Question 19

The I-band consists of .

Accepted Answer

A)  thin filaments 
B)  H zone 
C)  M line 
D)  thick filaments 
A)  thin filaments 
B)  H zone 
C)  M line 
D)  thick filaments

Question 20

Each of the elements that make up a skeletal muscle is surrounded by connective tissue. Which words below correctly pair the connective tissue layer with the corresponding muscle structure?

Accepted Answer

A)  functional group of muscles: endomysium 
B)  fascicle: perimysium 
C)  entire muscle: epimysium 
D)  muscle fiber: deep fascia 
A)  functional group of muscles: endomysium 
B)  fascicle: perimysium 
C)  entire muscle: epimysium 
D)  muscle fiber: deep fascia

Exam 12: Microscopic Anatomy and Organization of Skeletal Muscle

An aponeurosis is .

The function of the neuromuscular junction is to .

This contractile protein is shaped like a golf club.

The neuromuscular junction consists of .

What is the correct order of structures as you move from outside a muscle cell, to deep inside it?

This contractile protein forms the thin filaments.

Sarcomeres consist of _.

The dark band of skeletal muscle consists of .

From gross to microscopic, the parts of a muscle are .

This indentation of the sarcolemma carries electrical signals deep into the muscle cells.

Tendons differ from ligaments in that .

Terminal cisterns _.

The thick and thin filaments are made up of _, respectively.

At the neuromuscular junction, the electrical signal of the nerve .

This strong, cord-like structure attaches muscles to bones.

The actual contractile units of muscles extend from Z disc to Z disc. They are _.

A muscle fiber is _ .

Acetylcholine (ACh) is the neurotransmitter of axon terminals at the neuromuscular junction. It .

The I-band consists of .

Each of the elements that make up a skeletal muscle is surrounded by connective tissue. Which words below correctly pair the connective tissue layer with the corresponding muscle structure?

The Language of Anatomy

Organ Systems Overview

The Microscope

The Cell: Anatomy and Division

The Cell: Transport Mechanisms and Cell Permeability

Classification of Tissues

The Integumentary System

Overview of the Skeleton: Classification and Structure of Bones and Cartilages

The Axial Skeleton

The Appendicular Skeleton

Articulations and Body Movements

Gross Anatomy of Muscular System

Skeletal Muscle Physiology: Frogs and Human Subjects

Histology of Nervous Tissue

Neurophysiology of Nerve Impulses: Frog Subjects

Gross Anatomy of the Brain and Cranial Nerves

Electroencephalography

The Spinal Cord and Spinal Nerves

The Autonomic Nervous System

Human Reflex Physiology

General Sensation

Special Senses: Anatomy of the Visual System

Special Senses: Visual Tests and Experiments

Special Senses: Hearing and Equilibrium

Special Senses: Olfaction and Taste

Functional Anatomy of the Endocrine Glands

Endocrine Wet Labs and Human Metabolism

Blood

Anatomy of the Heart

Conduction System of the Heart and Electrocardiography

Anatomy of Blood Vessels

Human Cardiovascular Physiology: Blood Pressure and Pulse Determinations

Frog Cardiovascular Physiology

The Lymphatic System and Immune Response

Anatomy of the Respiratory System

Respiratory System Physiology

Anatomy of the Digestive System

Digestive System Processes: Chemical and Physical

Anatomy of the Urinary System

Urinalysis

Anatomy of the Reproductive System

Physiology of Reproduction: Gametogenesis and the Female Cycles

Survey of Embryonic Development

Principles of Heredity

Surface Anatomy Roundup

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