Week 5'

Question 1

what are the three muscle layers

Answer 1

1. Epimysium (outer)
   
   2. Perimysium
      Endomysium

Question 2

A band contains what

Answer 2

Thick filaments, myosin

Question 3

Where is the Z line located

Answer 3

End of sarcomere

Question 4

What does the I band contain

Answer 4

Thin filaments, actin

Question 5

Where are the M line and H zone located

Answer 5

In the middle of the sarcomere

Question 6

Define titan

Answer 6

A large elastic protein that anchors myosin filaments in the middle of the sarcomeres

Question 7

U recruitment characteristics are determined by what

Answer 7

Soma size (size principle)

Question 8

muscle force is controlled by the level of what

Answer 8

neural drive delivered to the MN pool

Question 9

Increased neural drive results in what

Answer 9

the recruitment of larger Mus at progressively higher firing rates

Question 10

Define MU recruitment

Answer 10

• The process of activating extra Mus to increase contraction strength

Question 11

Define size principle

Answer 11

Recruitment in order of MU size, smallest to largest

Question 12

Perception of effort is dependent on what

Answer 12

the drive delivered to the MN pool

Question 13

Define rate coding (temporal summation)

Answer 13

• Increased neural drive also results in an increase in MU firing rates
  Rate coding is one way neurons encode information. As the intensity of a stimulus increases, the firing rate of spikes increases as well.

Question 14

What is asynchronous MU firing

Answer 14

• In unfatigued sub-maximal contractions individual Mus produce bumpy force profiles