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What does the mitochondria do in muscle cell?
Mitochondria in muscle cells produce energy through a process called cellular respiration, generating ATP (adenosine triphosphate) that fuels muscle contractions. This energy production enables muscle cells to sustain prolonged contractions during physical activities.
What are the differences between phasic and tonic muscle contractions?
Phasic muscle contractions are quick and powerful, used for activities like jumping or throwing. Tonic muscle contractions are sustained and steady, used for activities like maintaining posture or holding a position.
Where would mitochondria be most numerous and why?
Mitochondria are most numerous in cells with high energy demands, such as muscle cells and liver cells. These cells require a lot of energy for activities like muscle contractions and detoxification processes, so they have more mitochondria to efficiently produce ATP through aerobic respiration.
Are isotonic contractions often preceded by isometric contractions?
Isotonic contractions can be preceded by isometric contractions, especially during activities that require a gradual increase in muscle tension before movement occurs. In isometric contractions, muscles generate tension without changing length, which can stabilize joints and prepare the muscles for subsequent isotonic contractions, where the muscle shortens or lengthens while maintaining tension. However, isotonic contractions can also occur independently, depending on the specific movement and muscle activation patterns involved.
What cells are abundant in mitrochondria?
Cells that require a lot of energy for daily activities, such as muscle cells.
Which cell have creatine phosphate in them?
Creatine phosphate exist in muscle and brain cells.
What is the ability of a muscle group to continue muscle movement over a period of time?
Muscular endurance is the ability of a muscle group to sustain repeated contractions or muscle movements over a prolonged period without getting fatigued. This type of endurance is important for activities that require prolonged, repetitive muscle contractions like running, cycling, or swimming.
How do isotonic and isometric contraction differ?
Isotonic contractions involve a change in muscle length and joint movement, while isometric contractions do not result in joint movement or change in muscle length. Isotonic contractions are further classified into concentric (muscle shortens) and eccentric (muscle lengthens) contractions. Isometric contractions involve the muscle producing tension without changing its length.
What are two things you can do with a voluntary muscle?
With a voluntary muscle, you can control movements like lifting your arm or walking, as these actions are consciously initiated. Additionally, you can engage in activities such as playing a musical instrument or typing, which require precise coordination and control over muscle contractions.
What bio molecule directly supplies your muscles with quick energy when broken down?
The biomolecule that directly supplies your muscles with quick energy when broken down is adenosine triphosphate (ATP). ATP is stored in muscle cells and is readily available for immediate energy needs during high-intensity activities. When muscles require energy, ATP is hydrolyzed to adenosine diphosphate (ADP) and inorganic phosphate, releasing energy for muscle contractions. This process occurs within seconds, making ATP the primary energy currency for rapid muscle activity.
What is creatine phosphate system?
The creatine phosphate system is a short-term energy system in the body that provides energy for high-intensity, short-duration activities like sprinting or weightlifting. It involves the conversion of creatine phosphate into ATP (adenosine triphosphate), which is the primary energy source for muscle contractions. The creatine phosphate system is important for activities that require quick bursts of power.
Is food transform chemical energy into kinetic energy?
Yes, food provides the body with chemical energy in the form of calories, which are then converted into kinetic energy to power movements and activities. This process occurs through the metabolic breakdown of nutrients in the body to produce the energy needed for muscle contractions and other physical activities.
