Question

The Myosin head pivots towards the M-line during the power stroke of muscle contraction immediately after:...

  1. The Myosin head pivots towards the M-line during the power stroke of muscle contraction immediately after:
  1. ATP binds to the myosin head
  2. ADP and Pi fall of the head
  3. The myosin head hydrolyzes the ATP to ADP and Pi
  4. Calcium binds to troponin
  1. From Smallest to largest, which of the following is in the correct order:
  1. Myofilament, Myofibril, Myofiber
  2. Myofiber, Myofilament, Myofibril
  3. Myofiber, Myofibril, Myofilament
  4. Myofibril, Myofilament, Myofiber
  1. Which of the following is not a component of a thin filament?
  1. Tropomyosin
  2. Actinin
  3. Nebulin
  4. Troponin

4. Where are myofibrils located:

  1. In a Triad
  2. In the Sarcoplasmic Reticulum
  3. In the Sarcoplasm
  4. In a T Tubule

5. Which of the following is not present in a Neuromuscular Junction

  1. Nicotinic Receptors
  2. Synaptic Terminal
  3. T Tubules
  4. Junctional Folds
  5. Motor End-Plate
Science   Anatomy-And-Physiology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

The Myosin head pivots towards the M-line during the power stroke of muscle contraction immediately after:

c. The myosin head hydrolyzes the ATP to ADP and Pi.

From Smallest to largest, which of the following is in the correct order:

a.Myofilament, Myofibril, Myofiber

Which of the following is not a component of a thin filament?

c.Nebulin

Where are myofibrils located:

c. In the Sarcoplasm

Which of the following is not present in a Neuromuscular Junction

c. T-tubules

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Part 2: Create a hand drawn diagram of the excitation-contraction coupling, beginning with the action potential...
Part 2: Create a hand drawn diagram of the excitation-contraction coupling, beginning with the action potential initiation at the neuromuscular junction and ending with sliding filament action. Be sure to include the following terms: Synaptic terminal, Synaptic Cleft, Acetylcholine, Action Potential, T-tubule, Calcium, Nicotinic Acetylcholine Receptor, Sarcolemma, Contraction, Sarcoplasmic Reticulum, Excitation, Neuromuscular Junction, Troponin, Tropomyosin, Actin, Myosin, Sodium. Potassium, Z-line
Place the following events in the correct order they occur during excitation-contraction coupling in skeletal muscle:...
Place the following events in the correct order they occur during excitation-contraction coupling in skeletal muscle: Myosin forms a tight bond with actin and undergoes the ‘power stroke’. The troponin/tropomyosin complex shifts, exposing the myosin binding sites on the actin filament. Ca2+ binds to troponin. Ca2+ moves out of the sarcoplasmic reticulum (called a “calcium spark”). An action potential in the alpha motor neuron leads to the release of neurotransmitter at the neuromuscular junction. Nicotinic receptors on the motor end...
Activity 1 Using the list of (10) events for muscle contraction. match the numbers of the...
Activity 1 Using the list of (10) events for muscle contraction. match the numbers of the steps from with the correct periods below in which they would occur. Latent period: Contraction period: Relaxation period Hint- 10 events of muscle contraction 1. Action potential (electrical stimulation) from somatic (motor) nerve stimulates skeletal muscle fibers (cells) at neuromuscular junction 2.“AP” causes the opening of Na+ channels on the sarcolemma thus causing a wave of depolarization to travel from the neuromuscular junction. 3....
1. When an action potential reaches the T-tubule, it will activate the dihydropyridine receptor at the...
1. When an action potential reaches the T-tubule, it will activate the dihydropyridine receptor at the T-tubule to change conformational shape. Dihydropyridine receptor will trigger ryanodine receptor channel to secrete Ca2+ from the sarcoplasmic reticulum into the cytosol. When action potential is absent, Ca2+ ATPase at the sarcoplasmic reticulum will pump cytosolic Ca2+ into the sarcoplasmic reticulum. Select one: a. True b. False 2. What is TRUE about the myofibril? Select one: a. The thick and thin filaments on the...
Place the events of muscle contraction in the correct order. Selected Answer 1. ACh binds the...
Place the events of muscle contraction in the correct order. Selected Answer 1. ACh binds the nicotinic receptors at the neuromuscular juncton causing an electrical signal to develop along the muscle membrane. 2. electrical signal from the motor neuron causes the release of ACh 3. Calcium is pumped into the sarcoplasmic reticulum. 4. The signal travels into the muscle cell along the T tubules. 5. The electrical signal causes the sarcoplasmic reticulum to release calcium. 6. "Calcium binds to the...
physiology of muscle contraction, select the correct description of the step from the following three options...
physiology of muscle contraction, select the correct description of the step from the following three options step 1 a. Ca moves out of the synaptic knob triggering exotyosis of acetylcholine b. Ca moves into synaptic knob, triggering exotyosis of acetylcholine c. Ca moves into synaptic knob triggering endocytosis of acetylcholine step 2. a. acetylcholine binds to CG-NA channels, Na moves into myofiber b. acetylcholine binds to CG-NA channels, Na moves out of myofiber c. acetylcholine binds to CG-NA channels, Ca...
The molecular process that makes muscle contraction possible is that ATP binds to myosin, which releases...
The molecular process that makes muscle contraction possible is that ATP binds to myosin, which releases the energy needed to make the muscle contract. In this problem, we will examine the quantities of energy involved in this process. Part 1 The reaction of ATP hydrolysis catalyzed by myosin (M) occurs in several steps*: M + ATP → M·ATP M·ATP → M·ADP·Pi M·ADP·Pi → M·ADP + Pi (aq) M·ADP → M + ADP * T. Kodama & R.C. Woledge, "Enthalpy Changes...
31. What is required in Endochondral Ossification? A. Hyaline Cartilage. B. Fibrous Connective tissue. C. Elastic...
31. What is required in Endochondral Ossification? A. Hyaline Cartilage. B. Fibrous Connective tissue. C. Elastic connective tissue. D. Dense irregular Connective Tissue. E. myofiber.    32. The refractory period is the time: A. between stimulation and the start of contraction. B. when the muscle is shortening. C. when the muscle is lengthening. D. following a stimulus during which a muscle cell cannot respond to another stimulus. E. it takes for acetylcholine to cross the synaptic cleft.   33. Fused...
9. Sarcomeres contain thin filaments of ________ and thick filaments of ________. a.         creatine, adenosine b.        ...
9. Sarcomeres contain thin filaments of ________ and thick filaments of ________. a.         creatine, adenosine b.         hemoglobin, myoglobin c.         troponin, tropomyosin d.         actin, myosin 10. When stimulated by a muscle impulse, what do the terminal cisternae release into the sarcoplasm?         A)    sodium ions, Na+         B)    calcium ions, Ca2+         C)    adenosine triphosphate, ATP         D)    acetylcholine, ACh 11. In the sliding filament model, ________ stay in place and ________ are pulled toward the center...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT