Log inSign up for FREE
Library

Unit 3 Exam Review

Last updated over 4 years ago
47 questions
1

You have been planking for one minute now, you feel a burning sensation in your core because...

1

Concentric contraction is...

1

Which of the following describes eccentric contractions? (select all that apply Hint: you should select 3 answers)

1

You fell in cheer practice and broke your left arm 2 months ago. Today your cast comes off and your bicep is small?!

1

You just finished summer league training for football. You go to put your jeans on and they don't fit....why?

1

Which of the following is an example of Isometric contraction?

1

Involuntary contractions of muscles can lead to

1

Which of the following is a eccentric movement of the bicep?

1

You just finished summer league training for soccer. Your leg muscles are larger then ever because they experienced..

1

Fascia tapers off at the ends of skeletal muscles to form ___ which connects the skeletal muscle to a bone.

1

The many tubes that fill a muscle fiber, and themselves are made up of long strands of protein filaments

1

These make the striations as you can see in the image shown. They are made up of actin.

1

Contracting units of a muscle made up of actin and myosin, that extend from Z-line to Z-line.

1
1
1
1
1
1

The layers of connective tissue in a skeletal muscle, in order of innermost to outermost are:

1

The perimysium surrounds

1

The endomysium surrounds

1

The epimysium surrounds

1

Hint: bundle of muscle fibers

1
1
1
1
1
1

Letter _____ would be found in a muscle like your latissimus dorsi, a large muscle on your back which makes imprecise movements. This is a large motor unit.

1

Which of the following correctly describes the events that happen directly after acetylcholine binds the motor end plate?

1

Which of the following statements is true? Use the image to help you!

1

A motor neuron is labeled by number....

1

Acetylcholine is released by number ________.

1

The synaptic cleft is the gap between the axon terminal and the motor end plate of the sarcolemma. The motor end plate is labeled by number

1

Acetylcholine receptors are labeled by number....

1

In the myofibril cross section shown below, letter C labels __________ .

1

When doing a bicep curl, as you pull the weight in your hand up toward your shoulders, the Tricep acts as....

2

Put the following steps in order:

  1. Tropomyosin shifts
  2. Troponin changes shape
  3. Calcium binds to troponin
  4. A cross bridge is formed
  5. Actin binding sites are free
2

Once a cross bridge is formed, a powerstroke takes place in which _____________________and ______________.

1

"A few hours after a person or animal dies, the joints of the body stiffen and become locked in place. This stiffening is called rigor mortis. It's only a temporary condition. Depending on body temperature and other conditions, rigor mortis lasts approximately 72 hours. The phenomenon is caused by the skeletal muscles partially contracting. The muscles are unable to relax, so the joints become fixed in place."

After a person is dead, their cells no longer produce the energy form needed to break a cross bridge, so the actin and myosin stay contracted producing tone. Which of the following is unable to happen in a person once dead, to break the cross bridge, causing this condition?

2

Calcium released from the _________ binds to __________.

1

In the myofibril cross section shown below, letter A labels _________ .

1

In the myofibril cross section shown below, letter B labels _________ .

1

In the myofibril cross section shown below, letter E labels _________ .

1

In the myofibril cross section shown below, letter D labels _________ .

1

Which of the following occurs during muscle relaxation?

1

Please explain EVERYTHING happening in the image in as much DETAIL as possible!