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,...
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Need help with both please #3 and #7
![Question 3
Which of the following creates a muscle contraction?
O When the muscle filaments remain stationary and the muscle lengthens.
O When a chemical message passes from the muscle fiber into the motor neuron
O When the myofibrils organize into repeating segments called sarcomeres.
When muscle filaments slide across each other and the muscle shortens.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb5b35509-0b77-4a0a-88c0-a637e9e03cb4%2Fb051a583-a9cf-4deb-b97a-27101dfba34a%2Fkpxr9ff_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Question 3
Which of the following creates a muscle contraction?
O When the muscle filaments remain stationary and the muscle lengthens.
O When a chemical message passes from the muscle fiber into the motor neuron
O When the myofibrils organize into repeating segments called sarcomeres.
When muscle filaments slide across each other and the muscle shortens.
![Which of the following describes the relationship between myosin and actin?
O When actin binds to protein complex, it shifts and exposes myosin-binding sites
O When the energy powers of myosin and actin combine, t 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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb5b35509-0b77-4a0a-88c0-a637e9e03cb4%2Fb051a583-a9cf-4deb-b97a-27101dfba34a%2F1580qv_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Which of the following describes the relationship between myosin and actin?
O When actin binds to protein complex, it shifts and exposes myosin-binding sites
O When the energy powers of myosin and actin combine, t 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
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