Log in
Sign up for FREE
arrow_back
Library

Copy of Structure and Function of Skeletal Muscles - Questions (5/28/2026)

star
star
star
star
star
Last updated about 2 hours ago
9 questions
Note from the author:
5
5
1
4
10
1.5
1.5
1
1
Use the provided notes covering the Structure and Function of Skeletal Muscles to help you answer the following questions.

Hint - you can search the pdf via "Ctrl + F" then by typing in a word or short phrase.
Use the provided notes covering the Structure and Function of Skeletal Muscles to help you answer the following questions.

Hint - you can search the pdf via "Ctrl + F" then by typing in a word or short phrase.
Use the following notes to help you answer the following questions.

Notes - https://drive.google.com/file/d/1E1_tWyghpm3yOBjbItgtn2uDZs6SwHs8/view?usp=sharing

Hint - you can search the pdf via "Ctrl + F" then by typing in a word or short phrase.
Question 1
1.

Draggable itemarrow_right_altCorresponding Item
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
Question 2
2.

Draggable itemarrow_right_altCorresponding Item
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
Question 3
3.
In muscle, the greater the innervation ratio of motor units, the greater its __________; and lower innervation ratios __________.

With isotonic contraction, the muscle maintains a constant __________ as it contracts; with isometric contraction, the muscle maintains a constant __________ as __________ increases.
Question 4
4.

Question 5
5.
a.) Muscle constitutes approximately _______ % of adult body weight.
b.) Skeletal muscles are made up of _______ % water.
c.) There are three layers of tissue surrounding skeletal muscles; they are (from outside to inside): _______ , _______ , and _______ .
d.) There are approximately _______ skeletal muscles in the human body.
e.) Fusiform muscles are shaped like _______ and articulate from _______ to another.
f.) Type I muscle fibers are also known as _______ .
g.) The _______ is the smallest unit of muscle visible without a microscope.
h.) The _______ -band contains thick myosin filaments.
i.) Muscle contraction begins with an _______ that initiates in the neuromuscular junction.
j.) During relaxation, calcium ions are stored in the _______ .
k.) The primary function of muscle is to do _______ .
l.) Muscle fibers that rely on anaerobic pathways for ATP production are known as _______-twitch fibers.
m.) The _______ is the structural unit of contraction; it contains many _______ .
n.) Calcium ions are used to reveal the myosin-bind sites by binding to the _______ complex.
o.) Tendons attach _______ to bone at a site called the _______ .
Question 6
6.

Question 7
7.

Question 8
8.

Question 9
9.

Match the following with their descriptors.
Agonist Muscle
Elongated and articulate from one joint to another.
Fusiform Muscles
Muscle that primarily uses aerobic pathways for ATP
Antagonist Muscles
Z-bands, I-bands, and A-band
Myofibrils
Tapers to form tendons
Tendons
Relaxed when the reciprocal muscle is contracted
Sarcomere
Functional unit of contraction.
Pennate Muscles
Contracted when the reciprocal muscle is relaxed
Type II Fibers
Broad and flat with fibers running obliquely.
Type I Fibers
Allow muscles to exert force on joints.
Epimysium
Cannot resist fatigue for long periods.
Match the following with their descriptors.
Myosin
Provides skeletal muscle with its striated appearance
Z-bands
Conducts action potentials for muscle contraction
Tendons
Structural unit of contraction
Myofibrils
Bundles muscle fibers into fascicles
Endomysium
Inhibits muscle contraction until calcium binds
Sarcoplasmic Reticulum
Transmits force from muscle to bone
Epimysium
Provides striated appearance to muscle fibers.
Perimysium
Surrounds individual muscle fibers
Sarcolemma
Stores calcium ions for muscle contraction
Troponin-Tropomyosin Complex
Thick filament involved in muscle contraction
Sequence the events that occur in muscle contraction and then relaxation.
Cross-bridges breakdown; sarcomeres lengthen.
Ryanodine receptors open and calcium ions flow into the cytoplasm.
Muscle fiber action potential spreads along the sarcolemma
Troponin-tropomyosin complex returns to block the binding sites on actin.
Action potential in motor nerve reaches the neuromuscular junction.
Myosin uses ATP, forming actin-myosin cross-bridges, causing thin actin filaments to slide toward the thick myosin filaments; the sarcomere shortens.
Calcium moves back into the sarcoplasmic reticulum.
Calcium ions bind to troponin, causing a conformational change that opens binding sites on actin filaments.
Which of the following would not impact muscle contractions?
Fiber type
Muscle temperature
Fat levels
Innervation ratio
Muscle color
Sunlight
Which of the following statements about skeletal muscles, ATP, and oxygen are true?
Skeletal muscle requires a constant supply of ATP for contraction.
Oxygen debt refers to excess oxygen available after exercise.
ATP production increases significantly during intense activity.
Muscle fibers can function without any oxygen for extended periods.
Phosphocreatine helps regenerate ATP during muscle activity.
Aerobic pathways produce ATP more efficiently than anaerobic pathways.
Which of the following statements accurately describe the steps involved in muscle contraction? (Select all that apply)
Excitation begins with an action potential from a nerve terminal.
Contraction occurs when myosin detaches from actin
Coupling involves calcium binding to troponin.
Relaxation occurs when calcium is released from the sarcoplasmic reticulum.
Which of the following steps are NOT part of the muscle contraction process? (Select all that apply)
Exicitation
Neural Inhibition
Contraction
Relaxation