Muscles are required in breathing, talking, running, walking, and any body movement. Actin and myosins are protein filaments present in muscle cells that help to contract and relax or change the shape of muscles. Muscles are responsible for the movement or motion of organisms. Joints are the connection between two or more bones. Most joints are mobile.
Muscle strength is determined by several factors. Some of those are the physical shape, size, and innervation of the muscles.
Weak contraction
- Potassium accumulates in the sarcoplasm.
- Contracted lower sarcoplasm pH.
- Begin contraction with muscle already 50%.
- The circular arrangement of muscle fascicles.
Stronger contraction
- Increase in muscle belly circumference.
- A lesser proportion of motor neurons to muscle fibers.
- Increased recruitment.
- Increased stimulus frequency.
Answer:
1. Providing structure --> Collagen makes skin strong yet flexible.
2. Maintaining homeostasis --> Insulin controls the concentration of sugar in the blood.
3. Fighting Disease --> IgA prevents the buildup of viruses and bacteria in the gut.
4. regulating chemical reactions --> Pepsin works in the stomach to speed up the breakdown of food.
Answer:
- There are many craters on the moon
- Spherical rocky body
- The moon has great basins
- Many great dark plains
H o H o Hope this helped!
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Answer:
The correct option is mildly.
Explanation:
Well...to answer and explain this answer to,you got to think on the simple possibilities. Let's look at the answer natural selection. As you may know,natural selection is the survival of the strongest(or fittest). Nature is picking the best of alleles for the gene pool. Ex. Humans who can survive the harshest of weather or diseases will be chosen to reproduce and keep the genes going.
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