What does the presence of many mitochondria imply about a cell?
What does the presence of many mitochondria imply about a cell's energy requirements? Mitochondria produce energy, in the form of ATP molecules, for the cell. A large number of mitochondria in a cell indicates a high demand for energy.
Why do large cells need more mitochondria?
Muscle cells are assiciated with a large number of mitochondria as they require more ATP (energy) to function than other cells. They need this because of their frequent contraction and relaxation, which requires more ATP than average cells.
How do mitochondria produce energy?
Mitochondria produce energy through the process of cellular respiration. Mitochondria are membrane-bound cell organelles found in the cytoplasm of all eukaryotic cells. They generate energy -ATP (Adenosine Tri Phosphate) from food through cellular respiration.
What cellular process occurs on the Infolded membranes of mitochondria?
What cellular process occurs on the infolded membranes shown at B? The folded membranes that comprise the cristae and the gel-like fluid between them (the matrix) are the locations of cellular respiration.
What major function occurs on the specific membrane indicated by a?
What major function occurs on the specific membranes indicated by A? Structure A is the rough endoplasmic reticulum (ER). The figure illustrates how proteins are synthesized on ribosomes bound to the rough ER, sorted in the Golgi, and delivered to the plasma membrane for secretion or packaged into lysosomes.
What does it mean for a cell to be selectively permeable?
The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot. Water can pass through between the lipids.
Which cell structures are seen under electron microscope?
The cell wall, nucleus, vacuoles, mitochondria, endoplasmic reticulum, Golgi apparatus, and ribosomes are easily visible in this transmission electron micrograph.
What happens if a cell has more mitochondria?
Logically, mitochondria multiply when a the energy needs of a cell increase. Therefore, power-hungry cells have more mitochondria than cells with lower energy needs. For example, repeatedly stimulating a muscle cell will spur the production of more mitochondria in that cell, to keep up with energy demand.
What cell has a lot of mitochondria?
A. Your heart muscle cells – with about 5,000 mitochondria per cell. These cells need more energy, so they contain more mitochondria than any other organ in the body!
What is the function of the mitochondria in the cell?
Mitochondria are well known as the powerhouse of the cell, and as discussed in the section on Generation of ATP: Bioenergetics and Metabolism, in an active tissue such as heart, they are responsible for generating most of the ATP in the cell.
Why is the mitochondria important in cellular respiration?
Mitochondria have an important role in cellular respiration through the production of ATP, using chemical energy found in glucose and other nutrients. Mitochondria are also responsible for generating clusters of iron and sulfur, which are important cofactors of many enzymes.
What role do mitochondria play in cellular respiration?
The main function of mitochondria is to produce energy through aerobic respiration. Principal fuels for ATP generation are fatty acids and glucose. The number of mitochondria a cell possesses depends on its metabolic demands.
What is the primary function of the mitochondria?
Mitochondria Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).
Which of the following would have occurred if a cell had consumed a large volume of extracellular fluid?
The cell would not be able to move its chromosomes during cell division.
What is meant by selectively permeable and state the selectively permeable membrane in this experiment?
A selectively permeable cell membrane is one that allows certain molecules or ions to pass through it by means of active or passive transport. Active transport processes require the cell to expend energy to move the materials, while passive transport can be done without using cellular energy.
Why is plasma membrane called a selectively permeable membrane and cell wall is called as fully permeable membrane?
The cell membrane is called selectively permeable as it only allows specific molecules to pass. Only specific molecules like water and gaseous molecules can pass through the cell membrane directly. It stops the flow of other molecules towards the two sides.
Why are mitochondria not visible under the microscope?
In practical terms, bacteria and mitochondria, which are about 500 nm (0.5 μm) wide, are generally the smallest objects whose shape can be clearly discerned in the light microscope; details smaller than this are obscured by effects resulting from the wave nature of light.
Are mitochondria visible under a light microscope?
Mitochondria are visible under the light microscope although little detail can be seen. Transmission electron microscopy (left) shows the complex internal membrane structure of mitochondria, and electron tomography (right) gives a three-dimensional view.
What cells have more mitochondria?
They are organelles, which are specialized structures within a living cell. The muscle cells in the heart contain far more mitochondria than any other organ in the human body, with around 5,000 mitochondria in every cell.
Why is mitochondria considered as the powerhouse of the cell?
Mitochondria are tiny organelles inside cells that are involved in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cell.
What is the advantage to cells of having mitochondria?
Mitochondria are advantageous as they allow the cell to respire aerobically, without them they can only respire anaerobically. As a result of this aerobic respiration due to the mitochondria's presence they can produce more ATP.
Which type of cells have a high concentration of mitochondria?
It is important to point out that muscle cells have a very high concentration of mitochondria that produce ATP. Your muscle cells need a lot of energy to keep your body moving. When your cells don't get enough oxygen, they do not make a lot of ATP.
What is the role of mitochondria?
The classic role of mitochondria is oxidative phosphorylation, which generates ATP by utilizing the energy released during the oxidation of the food we eat. ATP is used in turn as the primary energy source for most biochemical and physiological processes, such as growth, movement and homeostasis.
Why are mitochondria known as the powerhouse of the cell?
The proteins synthesized by the proteins in mitochondria are utilized to generate adenosine triphosphate (ATP) from the food. This ATP acts as the energy currency of the cell, because of which the whole cell and body get energy. Thus, mitochondria are called the powerhouse of the cells.
Why mitochondria have an important role in dividing cells?
Mitochondria are organelles with key roles in cellular metabolism. They have unique cellular dynamics to ensure their proper distribution to dividing cells and high fidelity of inheritance of their genome in a maternal mode of transmission.
How do mitochondria contribute to the function of the cell?
Known as the “powerhouses of the cell,” mitochondria produce the energy necessary for the cell's survival and functioning. Through a series of chemical reactions, mitochondria break down glucose into an energy molecule known as adenosine triphosphate (ATP), which is used to fuel various other cellular processes.
What would occur if the concentration of glucose in the extracellular fluid is higher than the concentration in the intracellular fluid?
If the concentration of glucose in the water outside of a cell is higher than the concentration inside, A. Water will tend to enter the cell by osmosis.
Which condition can cause an extracellular fluid volume excess?
Volume overload generally refers to expansion of the extracellular fluid (ECF) volume. ECF volume expansion typically occurs in heart failure, kidney failure, nephrotic syndrome, and cirrhosis. Renal sodium retention leads to increased total body sodium content.
What is meant by selectively permeable and why this term is applied to the cell membrane?
The cell membrane is selectively permeable, meaning it only lets certain things in and out. The structure of the phospholipid bilayer prevents random things from drifting through the membrane, and proteins act like doors, letting the right stuff in and out.
Why is plasma membrane called selectively permeable membrane How do substances like co2 and water move in and out of the cell?
The plasma membrane is called as selectively permeable membrane because it regulates the movement of substances in and out of the cell. It means that the plasma membrane allows some material to pass through it while at the same time it blocks other material from entering through it.