1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
OlgaM077 [116]
3 years ago
6

In fast-twitch oxidative-glycolytic fibers, their rapid increases in force rely on the ________ activity where rapid relaxation

requires ________ activity.
Biology
1 answer:
Kitty [74]3 years ago
4 0

Answer:

1. myosin ATPase

2. Ca2+-ATPase

Explanation:

ATPase activity of myosin head hydrolysis ATP and energize the myosin head. The energized myosin head forms cross bridges to facilitate the power stroke of muscle contraction. The fast-twitch oxidative-glycolytic fibers have the ability to produce ATP by aerobic respiration.  

These fibers have the  ATPase in their myosin heads that hydrolyze ATP three to five times faster than the myosin ATPase in slow fibers. This ensures the faster speed of contraction of these fast-twitch muscle fibers.

During their relaxation, Ca2+ ATPase pumps the calcium ions back to the sarcoplasmic reticulum. As the level of Ca2+ ions in the sarcoplasm decreases, calcium ions are released from troponin. Tropomyosin is allowed to cover the myosin-binding sites on actin and the muscle fiber relaxes faster.

You might be interested in
15. List any three human activities which would lead to an increase in the carbon dioxide
liberstina [14]
Consumption of electricity, transportation, and deforestation
3 0
3 years ago
Is an orchard grass a consumer?
VLD [36.1K]
Yes the orchard grass is a consumer. it consumes water and sunlight
3 0
3 years ago
What might happen to a person if their kidneys were not functioning properly. Where would waste go?
wariber [46]

The wastes would build up in your blood, and can cause serious damage. You can also have serious infections and pain if your kidney is not functioning properly.

8 0
3 years ago
Read 2 more answers
One problem with wind energy as a major source of electricity is _____. A. it is nonrenewable B. it causes major air pollution C
irina [24]

The correct option is D.

Wind has some advantages which makes it suitable as a source of energy but it also possesses some disadvantages which reduces its potentials as a viable source of energy. For instance, large expanse of land will be needed to construct wind farms and this may not be feasible especially in populated areas. Another disadvantage is that electricity production will be depended on the availability of wind, when there is no wind, there will be no electricity.

5 0
3 years ago
Read 2 more answers
when fossil fuels are burned they produce what the main greenhouse gas responsible for global warming trends
daser333 [38]
When fossil fuels are burned they can cause pollution which can cause global warming. 
7 0
3 years ago
Read 2 more answers
Other questions:
  • Match each of the four barriers of innate immunity with its mode of action.
    9·1 answer
  • How did expansionism change the knighted states role in the world
    10·1 answer
  • Why do animals need a regular supply of carbohydrates?
    14·1 answer
  • The carpals are bones that make up part of the hand. To which skeletal system do the carpals belong?
    8·1 answer
  • What biological molecule could best be described as fuel and building material?
    14·1 answer
  • Which of the following phase changes would absorb energy as it occurs?
    12·1 answer
  • Please answer quick!! 15 points!
    12·1 answer
  • How does the ocean currents affect climate?
    7·1 answer
  • Which individual is most clearly in need of diagnostic testing for lung cancer?
    6·1 answer
  • molly created 81 shells in the first 5 days in 10 days at the beach. she collected y shells in the last 5 days. if molly collect
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!