Muscular System Ch 6 Bio 2

Which connective tissue surrounds the whole muscle?

• epimysium

• endomysium

• perimysium

Which structure provides an attachment site for calcium?

• actin

• troponin

• tropomyosin

• m-line

Skeletal muscles...

• Require energy in order to contract

• Require energy in order to relax

• Relax when calcium ions are transported into the sarcoplasmic reticulum

• All of these

Which type of muscle cell has one nucleus, is striated and has intercalated disks?

• Skeletal

• Cardiac

• Smooth

Which is true about repolarization?

• Sodium moves into the cell

• Sodium moves out of the cell

• Potassium moves into the cell

• Potassium moves out of the cell

Tags

NGSS.HS-LS1-3

Which of the following puts the structures of the muscle in order from largest to smallest?

• Whole muscle, muscle fiber, actin & myosin, myofibril, muscle fasicle

• Whole muscle, muscle fasicle, muscle fiber, myofibril, actin & myosin

• Whole muscle, muscle fiber, muscle fasicle, myofibril, actin & myosin

• Whole muscle, muscle fasicle, muscle fiber, actin & myosin, myofibril

Tags

NGSS.HS-LS1-2

2 points-What causes a sarcomere to shorten?

(note: this app marks the question correct when answered. I will grade your answer you submit your Quizziz)

2 points-What are the origin and insertion and how do their positions

change when a muscle contracts?