Muscles and Muscle Contraction

What best describes your heart?

• smooth muscle

• skeletal muscle

• cardiac muscle

• memory muscle

Muscles are working in your body even when you are asleep and still.

• True

• False

Tags

NGSS.MS-LS1-7

Myorrhapy

• to suture a muscle

• to do surgery on a muscle

• the removal of a muscle

• the rupture of a muscle

The muscle that contracts during movement is called the

• agonist

• antagonist

• synergist

• flexor

Muscle tissue

• Is tissue that functions in lining, covering, and glandular tissue

• Is tissue involved in protecting, supporting, and binding together other body tissues

• Is tissue that contracts and shortens to produce movement 

• Tissue that receives and conducts electrochemical impulses from one part of the body to another

When the troponin molecule's binding site is empty the muscle is?

• full contraction

• complete tetanus

• at rest

• summation

Which of the following describes the sarcomere? 

• The basic unit of muscle’s cross-striated myofibril

• A protein band which defines the boundary between one sarcomere 

•  Various muscle proteins 

• Contains the protein, actin

How do pairs of skeletal muscles work together?

• while one contracts, the other returns to original length

• both muscles contract at the same time

• both muscles relax at the same time

• 1 muscle pulls on the bone and the other pulls on the first muscle

Oxygen debt in muscles may develop because of:

• the inability of respiratory and circulatory systems to supply enough oxygen to skeletal muscles when used strenuously for a minute or two.

• the inability of myoglobin molecules to store enough oxygen when skeletal muscles are used strenuously for a minute or two.

• too much oxygen used in forming pyruvic acid when skeletal muscles are contracted strenuously for a minute or two.

• too high a concentration of oxygen in the atmosphere.

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

When there is no nerve impulse, what is the name of the protein that covers the binding sites on actin?

• Myosin

• Troponin

• Titan

• Tropomyosin