Muscle Contractions
Presentation
•
Science
•
11th Grade
•
Easy
+1
Standards-aligned
John Burns Jr
Used 12+ times
FREE Resource
29 Slides • 13 Questions
1
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8
Multiple Choice
Skeletal Muscle contraction is initiated when the ________ sends a message to the muscle cell.
Muscle cell
Gland
Neuron
None of the above
9
Multiple Choice
___are thin filaments.
troponin
tropomyosin
actin
myosin
10
Multiple Choice
What is our current model of muscle contraction called?
Fluid Mosaic Model
Sliding Filament Theory
Newton's Laws of Motion
Big Bang Theory
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23
Reorder
Reorder the following steps for muscle contractions from 1st to last step
Ach is released across the synaptic cleft
An electrical current travels down the sarcolmena
The electrical current travels within the muscle fiber by the T-Tubles
The sarcoplasmic reticulum releases calcium into the sarcoplasm
Ca ions attach to troponin allowing the myofilaments to slide across one another
24
Multiple Choice
What two chemicals are necessary for muscle contraction to occur?
Niacin and Potassium
Calcium and ATP
Sodium and Potassium
Acetylcholine and Potassium
25
Multiple Choice
What is the function of acetylcholine?
ACh binds to receptors on the sarcolemma and opens ion channels
ACh binds to receptors on the sarcolemma and closes ion channels
ACh binds to ion channels and open them
ACh binds to ion channels and closes them
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32
Multiple Choice
What filament covers the actin and prevents the myosin head to attach to the actin (rope or strand shape).
tropomyosin
Myosin and actin
Calcium and Oxygen
troponin
33
Multiple Choice
34
Multiple Choice
What is a crossbridge?
Where myosin binds to actin
Where the calcium crosses into the cytoplasm
Where calcium binds with troponin
Where titin and myosin are connected
35
Multiple Choice
When a muscle is relaxed and in a lengthened position, what is the relationship between actin filaments?
They are on top of one another
They are beside each other
They are close to each other
They are far apart from each other
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Multiple Choice
The disease where a person no longer produces the protein dystrophin, causing their muscles to decrease. weaken, and disappear.
ALS
Muscular Dystrophy
Myasthenia Gravis
Tetanus
41
Multiple Choice
occurs when the connection between the nerves and muscle is lost
muscle loss
myasthenia gravis
fibromyalgia
involuntary hypotonicity
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Open Ended
Reflection: Based on this lesson, what did you learn the most muscle contractions.
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