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UNIT 3 Exam

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Last updated almost 5 years ago
25 questions
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Question 1
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Question 2
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Question 8
8.

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Question 9
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Question 10
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Question 11
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Question 12
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Question 13
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Question 14
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Question 15
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Question 16
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Question 17
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Question 18
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Question 19
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Question 20
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Question 21
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Question 22
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Question 23
23.

Explain what is happening in image 3 in as much detail as possible.

Question 24
24.

Name the event happening in image 2 and describe this event in as much detail as possible.

Question 25
25.

Describe what occurs to free the actin binding sites. Use the image below to help you and describe in as much detail as possible.

You have finished semester 1 of Anatomy and Physiology! Way to go! I hope you and your family have a wonderful break and stay healthy. All of your positive attitudes and commitments to working hard inspired and motivated me this semester. Thanks for all the effort and time you put into this class, and for being such great individuals!! Looking forward to semester 2 full of new turns and adventures. Together, we've got this! Now go get your eyes some rest from staring at this screen! See you in January, - Ms. Lifsitz
Contracting units of a muscle made up of actin and myosin, that extend from Z-line to Z-line.
Myofibril
Actin
Myosin
Z- Line
Sarcomere
T-Tubules
Sarcoplasmic Reticulum
Sarcoplasm
Sarcolemma
Nuclei
Fascia tapers off at the ends of skeletal muscles to form the___ which connects the skeletal muscle to a bone.
Perimysium
Endomysium
Tendon
Ligament
Question 3
3.
Question 4
4.
Question 5
5.
Question 6
6.

Question 7
7.

Match each connective tissue to the muscle tissue structure it surrounds.
Perimysium
Muscle Fiber
Endomysium
Entire Muscle
Epimysium
Fascicle
Put the following in the correct order to correctly describe the events that happen directly after the signal reaches the motor neuron?
Acetylcholine triggers the motor end plate.
An impulse is sent through the sarcoplasmic reticulum.
An impulse is sent through the T-Tubules.
The action potential reaches the axon terminal.
Which of the following statements is true? Use the image to help you!
A motor neuron can attach to MANY muscle fibers.
A muscle fiber can attach to MANY motor neurons.
Each muscle fiber has MANY motor end plates.
A motor neuron can only attach to ONE muscle fiber.
Precise movements, like those of the fingers, would be performed by which motor unit?
B
C
A
The gap between the motor neuron and the muscle fiber it supplies at the neuromuscular junction is called the .....
actin
"the gap"
synaptic cleft
sarcolemma
acetylcholine
vessicle
motor end plate
The motor end plate is labeled by number
1
2
3
4
5
In the myofibril cross section shown below, letter C labels __________ .
Z-line
a sarcomere
sarcoplasm
myofibril
H zone
actin
myosin
In the myofibril cross section shown below, letter B labels __________ .
actin
Z-line
myosin
H zone
a sarcomere
myofibril
sarcoplasm
Which image shows skeletal muscle tissue?
1
2
3
Which of the following occurs during muscle relaxation?
Actin binding sites are freed.
Calcium is pumped into the sarcoplasmic reticulum
T-tubules stimulate the sarcoplasmic reticulum
Acetylcholine crosses the synaptic cleft
You have been wall sitting for one minute now, you feel a burning sensation in your legs because...
Lactic acid is building up
Your muscles don't have enough calcium
More ATP than normal is being made
You are eating too little protein
You fell skiing and broke your right leg 6 months ago. Today your cast comes off and your calf muscle is small?!
atrophy
hypertrophy
You just finished a whole month of weight lifting to train for your spring sport. Your mom comments on how toned and large your muscles look. This enlargement of your muscles is due too.....
The number of muscle fibers increasing in your leg muscles.
The endomysium of your leg muscles thickening.
More mitochondria now being in your leg muscles,
The number of actin and myosin strands in your leg muscles increasing.
A bicep curl, while in motion of moving the weight toward your shoulder, is an eccentric contraction of your____________ and a concentric contraction of your ____________.
bicep, tricep
tricep, bicep
You plank for five minutes beating your four minute record. Abs of STEEL! You performed what type of contraction?
Isometric
Isotonic
Isocentric
Muscle fiber
Fascicle
T-Tubules
Blood Vessels
Sarcoplasmic Reticulum
Sarcomere
Nuclei
Myofibril
Z-line
Actin
Sarcolemma
Sarcoplasm
Myosin
Sarcomere
Sarcoplasm
Muscle fiber
Sarcoplasmic Reticulum
Myosin
Nuclei
Sarcolemma
Fascicle
Blood Vessels
Z-line
Myofibril
T-Tubules
Actin
Nuclei
Sarcoplasm
Sarcomere
Blood Vessels
Sarcolemma
Actin
Muscle fiber
Sarcoplasmic Reticulum
Myosin
Myofibril
Z-line
T-Tubules
Fascicle
The thinner of the two filaments that are large enough to see here is called....
Myosin
Troponin
Tropomyosin
Actin
Hint: bundle of muscle fibers
Perimysium
Epimysium
Blood Vessels
Muscle Fiber
Tendon
Fascia
Endomysium
Fascicle