Question

1.)The stride appearance of a skeletal muscle is due to

A.) The regular orderly arrangement of the T tubules

B.)The regular orderly arrangement of the lateral sacks of sacral plasmic reticulum

C.)The regular order the arrangement of thick and thin filaments into a and I

D.) The regular order the arrangement of motor units

e.) The presence of white and red muscle fibers within the muscle

2.) with regard to extension of the ankle and agonist is the___ and an antagonist is the___

A.) soleus

B.)gastrocenemuius

C.)soleus, gastrocnemius

D.) gastrocnemius, ti ialis anterior

e.) both a and d are correct

3.) I candy bar contains 458 cal and 16 g of fat what percentage of Candy bar is fat

A.) 28

B.)32

C.)29

D.) 31

Answer 1

1. C

Explanation:

The striated appearance of skeletal muscle tissue is a result of repeating bands of the proteins actin and myosin that are present along the length of myofibrils. Dark A bands and light I bands repeat along myofibrils, and the alignment of myofibrils in the cell causes the entire cell to appear striated or banded. Below is the diagram and you can easily notice the striations caused by the bands.​​

​​​​​

2. D

• Agonist muscles cause a movement to occur through their own activation.
• Antagonist muscles are simply the muscles that produce an opposing joint torque to the agonist muscle

3. Answer is D

1gm fat = 9 kcal

16 gm fat = 144 kcal

And total kcal are 458

Fraction is 144/458 = 31.44%~ 31%