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.
Match the following with their descriptors.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Agonist Muscle | arrow_right_alt | Elongated and articulate from one joint to another. |
Fusiform Muscles | arrow_right_alt | Muscle that primarily uses aerobic pathways for ATP |
Antagonist Muscles | arrow_right_alt | Z-bands, I-bands, and A-band |
Myofibrils | arrow_right_alt | Tapers to form tendons |
Tendons | arrow_right_alt | Relaxed when the reciprocal muscle is contracted |
Sarcomere | arrow_right_alt | Functional unit of contraction. |
Pennate Muscles | arrow_right_alt | Contracted when the reciprocal muscle is relaxed |
Type II Fibers | arrow_right_alt | Broad and flat with fibers running obliquely. |
Type I Fibers | arrow_right_alt | Allow muscles to exert force on joints. |
Epimysium | arrow_right_alt | Cannot resist fatigue for long periods. |
Match the following with their descriptors.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Myosin | arrow_right_alt | Provides skeletal muscle with its striated appearance |
Z-bands | arrow_right_alt | Conducts action potentials for muscle contraction |
Tendons | arrow_right_alt | Structural unit of contraction |
Myofibrils | arrow_right_alt | Bundles muscle fibers into fascicles |
Endomysium | arrow_right_alt | Inhibits muscle contraction until calcium binds |
Sarcoplasmic Reticulum | arrow_right_alt | Transmits force from muscle to bone |
Epimysium | arrow_right_alt | Provides striated appearance to muscle fibers. |
Perimysium | arrow_right_alt | Surrounds individual muscle fibers |
Sarcolemma | arrow_right_alt | Stores calcium ions for muscle contraction |
Troponin-Tropomyosin Complex | arrow_right_alt | Thick filament involved in muscle contraction |
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.
Sequence the events that occur in muscle contraction and then relaxation.
Muscle fiber action potential spreads along the sarcolemma
Action potential in motor nerve reaches the neuromuscular junction.
Cross-bridges breakdown; sarcomeres lengthen.
Troponin-tropomyosin complex returns to block the binding sites on actin.
Myosin uses ATP, forming actin-myosin cross-bridges, causing thin actin filaments to slide toward the thick myosin filaments; the sarcomere shortens.
Calcium ions bind to troponin, causing a conformational change that opens binding sites on actin filaments.
Calcium moves back into the sarcoplasmic reticulum.
Ryanodine receptors open and calcium ions flow into the cytoplasm.
a.) Muscle constitutes approximately
b.) Skeletal muscles are made up of
c.) There are three layers of tissue surrounding skeletal muscles; they are (from outside to inside):
d.) There are approximately
e.) Fusiform muscles are shaped like
f.) Type I muscle fibers are also known as
g.) The
h.) The
i.) Muscle contraction begins with an
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
m.) The
n.) Calcium ions are used to reveal the myosin-bind sites by binding to the
o.) Tendons attach
Which of the following would not impact muscle contractions?
Which of the following statements about skeletal muscles, ATP, and oxygen are true?
Which of the following statements accurately describe the steps involved in muscle contraction? (Select all that apply)
Which of the following steps are NOT part of the muscle contraction process? (Select all that apply)