Why do cell membranes with many convolutions?
Many convolutions increase the surface area of the cell, thus allowing for more interactions between the cell and its environment.
What organelles inside the cells have membranes with many convolutions?
The organelles that have membranes with many convolutions are the endoplasmic reticulum, Golgi apparatus, and the mitochondria.
What organelles inside the cell have membranes?
The nucleus, endoplasmic reticulum, vacuoles, lysosomes, and Golgi apparatus are examples of membrane-bound organelles. Mitochondria and chloroplasts are bound by a double membrane.
Why do some organelles have folded membranes like mitochondria and ER?
The function of the folds within the mitochondria is to increase the surface area of the mitochondrial membrane. Basically, the physical form of a structure can increase or decrease its surface area to volume ratio.
How do plant cells control turgor pressure?
One mechanism in plants that regulate turgor pressure is the cell's semipermeable membrane, which only allows some solutes to travel in and out of the cell, which can maintain a minimum amount of pressure. Other mechanisms include transpiration, which results in water loss and decreases turgidity in cells.
Why do these factors alter diffusion rates?
Why do these factors alter diffusion rates? Heat makes molecules gain energy and collide more making diffusion happen faster. more pressure means more molecule colliding means faster diffusion. Large molecules need more energy so they take longer to diffuse.
What do lysosomes and Golgi bodies have in common?
What do lysosomes and Golgi bodies have in common? They are examples of cell organelles.
Which organelles have membranes that are very intricately folded?
Mitochondria Structure Figure 4.9. 1: Mitochondrial structure: This electron micrograph shows a mitochondrion as viewed with a transmission electron microscope. This organelle has an outer membrane and an inner membrane. The inner membrane contains folds, called cristae, which increase its surface area.
Why do some organelles have membranes?
Membrane-bound organelles are surrounded by a plasma membrane to keep their internal fluids separate from the cytoplasm of the rest of the cell. Non-membrane bound organelles are more solid structures that are not fluid-filled, so they have no need for a membrane.
Why do eukaryotic cells have many different membrane bound organelles?
Eukaryotic cells are generally much larger and more complex than prokaryotic. Because of their larger size, they require a variety of specialized internal membrane-bound organelles to carry out metabolism, provide energy, and transport chemicals throughout the cell.
Why does the inner membrane have many folds?
To increase the capacity of the mitochondrion to synthesize ATP, the inner membrane is folded to form cristae. These folds allow a much greater amount of electron transport chain enzymes and ATP synthase to be packed into the mitochondrion.
Why do organelles with highly folded membranes have an advantage?
The folding increases the surface area where chemical reactions occur. How are highly folded membranes an advantage for the functions of cellular parts? Name an organelle that has highly folded membranes. Examples: endoplasmic reticulum and mitochondria.
What organelles are involved with turgor pressure?
Vacuole – An organelle in eukaryotes designed to hold a substance, sometimes water to create turgor pressure.
What two organelles are involved in turgor pressure?
Summary
- Plant cells have a cell wall, a large central vacuole, and plastids such as chloroplasts.
- The cell wall is a rigid layer that is found outside the cell membrane and surrounds the cell, providing structural support and protection.
- The central vacuole maintains turgor pressure against the cell wall.
What would increase the rate of diffusion across a cell membrane?
As with any chemical reaction, increasing the temperature or pressure increases the kinetic energy of the particles, thus increasing the rate of diffusion. Concentration Gradient: The greater the concentration gradient (the difference in concentration either side of the membrane) the greater the rate of diffusion.
How does the number of particles affect the rate of diffusion?
Mass of Particle: Heavier particles will move more slowly and so will have a slower rate of diffusion. Smaller particles on the other hand will diffuse faster because they can move faster.
What do the endoplasmic reticulum and Golgi body have in common?
Similarities Between Endoplasmic Reticulum and Golgi Apparatus. Both ER and Golgi apparatus are involved in the formation of endomembrane system of the cell. They are made up of flattened, membranous, fluid-filled sacs called cisternae. Cisternae are held together by the cytoskeleton of the cell.
What do lysosomes and Golgi bodies have in common quizlet?
What do lysosomes and Golgi bodies have in common? They are examples of cell organelles.
Which cells would have more mitochondria and why?
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!
Why do chloroplasts and mitochondria have double membranes?
The double membrane found in mitochondria and chloroplasts appears to be a relic of the absorption of the prokaryotic bacteria by the eukaryotic host cells. The inner membrane, which now contains numerous folds, apparently came from the bacterial membrane, while the outer membrane came from the host cell itself.
Why are most organelles membrane-bound?
Membrane-bound organelles offer several advantages to eukaryotic cells. First, cells can concentrate and isolate enzymes and reactants in a smaller volume, thereby increasing the rate and efficiency of chemical reactions.
Why do eukaryotic cells have many different membrane-bound organelles?
Eukaryotic cells are generally much larger and more complex than prokaryotic. Because of their larger size, they require a variety of specialized internal membrane-bound organelles to carry out metabolism, provide energy, and transport chemicals throughout the cell.
Why are organelles membrane-bound?
Membrane-bound organelles offer several advantages to eukaryotic cells. First, cells can concentrate and isolate enzymes and reactants in a smaller volume, thereby increasing the rate and efficiency of chemical reactions.
Why is compartmentalization in eukaryotic cells important?
Boosting Efficiency Compartmentalization in eukaryotic cells is largely about efficiency. Separating the cell into different parts allows for the creation of specific microenvironments within a cell. That way, each organelle can have all the advantages it needs to perform to the best of its ability.
Why is the inner membrane of the mitochondria highly folded quizlet?
Why is the inner mitochondrial membrane folded? Because the cristae increase the surface area for chemical reactions.
Why are folded membranes an advantage to a cell?
The folding increases the surface area where chemical reactions occur.
Why do cells have many folds?
Large, metabolically active cells often have lots of cell protrusions, resulting in many folds throughout the membrane. These folds increase the surface area available for transport of materials into or out of the cell.
What type of cell is involved with turgor pressure?
Turgor pressure is best known in plant cells but also occurs in walled cells of other organismal kingdoms. The build-up and maintenance of turgor pressure requires five key components: water, solutes, a selectively permeable membrane, a wall and metabolic energy.
What cell organelle makes turgor pressure in a plant cell possible describe the role of this organelle in this process?
The vacuole is also responsible for maintaining the shape of plant cells. When the cell is full of water, the vacuole exerts pressure outwards, pushing the cell membrane against the cell wall. This pressure is called turgor pressure.
Which molecules would diffuse faster across a membrane?
Generally, gases diffuse much faster than liquids, and liquids much faster than solids.