Need help with both please #3 and #7
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
Related questions
Question
Need help with both please #3 and #7

Transcribed Image Text:**Question 3**
Which of the following creates a muscle contraction?
- ○ When the muscle filaments remain stationary and the muscle lengthens.
- ○ When a chemical message passes from the muscle fiber into the motor neuron.
- ○ When the myofibrils organize into repeating segments called sarcomeres.
- ● When muscle filaments slide across each other and the muscle shortens.
The correct answer, indicated with a filled circle, is: "When muscle filaments slide across each other and the muscle shortens."

Transcribed Image Text:**Question:**
Which of the following describes the relationship between myosin and actin?
**Options:**
- O When actin binds to protein complex, it shifts and exposes myosin-binding sites.
- O When the energy powers of myosin and actin combine, it is called the power stroke.
- O When the myosin heads bind to actin, the cross bridges are established.
- O Myosin and actin do not interact at all in the muscle contraction process.
Expert Solution

Step 1
The muscles has an unique characteristics of contraction and relaxation. In the muscle fibre contractile proteins that are- actin filaments, myosin filaments and several other accessory proteins are involved in this muscle contraction.
Step by step
Solved in 4 steps

Recommended textbooks for you

Human Anatomy & Physiology (11th Edition)
Anatomy and Physiology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON

Anatomy & Physiology
Anatomy and Physiology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,

Human Anatomy
Anatomy and Physiology
ISBN:
9780135168059
Author:
Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon
Publisher:
Pearson Education, Inc.,

Human Anatomy & Physiology (11th Edition)
Anatomy and Physiology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON

Anatomy & Physiology
Anatomy and Physiology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,

Human Anatomy
Anatomy and Physiology
ISBN:
9780135168059
Author:
Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon
Publisher:
Pearson Education, Inc.,

Anatomy & Physiology: An Integrative Approach
Anatomy and Physiology
ISBN:
9780078024283
Author:
Michael McKinley Dr., Valerie O'Loughlin, Theresa Bidle
Publisher:
McGraw-Hill Education

Human Anatomy & Physiology (Marieb, Human Anatomy…
Anatomy and Physiology
ISBN:
9780321927040
Author:
Elaine N. Marieb, Katja Hoehn
Publisher:
PEARSON