Why can't cells the size of golf-balls exist? A cell that large would not have enough surface area to use in exchanging materials. Vibrio cholerae causes severe diarrhea in its victims. How might it cause this to occur? It tricks the cells of the intestines into secreting ions.
What would happen if a cell is too large?
- A cell that large would be too hypertonic to prevent swelling. - A cell that large would not have enough energy inside it to run. - A cell that large would not have enough surface area to use in exchanging materials.
What is the size of a golf ball?
Older golf balls, known as a British ball, can be found with a diameter less than 1.68 inches, as some golf balls, pre-1990s, had a width of 1.62 inches. Let's go back in time and look at the history of golf ball size.
How many dimples are on a golf ball?
There is no definite number as to how many dimples are carved on every golf ball. The number varies between 300 to 500 in most cases. In fact, certain manufactures produce golf balls with different dimples count to derive different results.
What are golf balls made of?
Some will know that the earliest golf balls used feathers, tree sap, and wood and that now more modern balls use man made compounds like Urethane and rubber wound cores. Older golf balls, known as a British ball, can be found with a diameter less than 1.68 inches, as some golf balls, pre-1990s, had a width of 1.62 inches.
How does the plasma membrane stop most substances from crossing it?
How does the plasma membrane stop most substances from crossing it? The non-polar fatty acid tails form a barrier to polar substances. (ons and polar molecules cannot cross the nonpolar interior of the membrane.)
How does oxygen and carbon dioxide move across the cell membrane?
1)Across cell membranes, oxygen and carbon dioxide move or transport via simple diffusion, and no energy input is required in this process, and on either side of the cell membrane, it is driven by differences in concentration.
Which of the following forms of endocytosis occurs when the plasma membrane pinches inward to bring in materials from outside the cell?
- passive transport. In endocytosis, the plasma membrane forms a pocket that pinches inward, forming a vesicle that contains material from outside the cell.
What is facilitated diffusion simple?
Facilitated diffusion is the passive movement of molecules along the concentration gradient. It is a selective process, i.e., the membrane allows only selective molecules and ions to pass through it. It, however, prevents other molecules from passing through the membrane.
What molecules Cannot easily pass through the cell membrane?
The plasma membrane is selectively permeable; hydrophobic molecules and small polar molecules can diffuse through the lipid layer, but ions and large polar molecules cannot.
Why do some molecules need help moving across a cell membrane in the form of energy?
Sometimes, molecules cannot move through the cell membrane on their own. These molecules need special transport proteins to help them move across the membrane, a process known as facilitative diffusion. These special proteins are called channel proteins or carrier proteins.
What type of transport occurs when a large cell consumes a smaller cell such as a bacterium?
Phagocytosis (literally, “cell eating”) is a form of endocytosis in which large particles, such as cells or cellular debris, are transported into the cell.
How does a cell use exocytosis to release the contents of a vesicle outside the cell?
Exocytosis definition and purposes. Exocytosis is the process by which cells move materials from within the cell into the extracellular fluid. Exocytosis occurs when a vesicle fuses with the plasma membrane, allowing its contents to be released outside the cell.
How is large particulate matter brought into the cell?
Phagocytosis is a special form of endocytosis in which large particles such as microorganisms and dead cells are ingested via large endocytic vesicles called phagosomes.
Where does the energy come from to power the sodium-potassium pump?
The sodium-potassium pump carries out a form of active transport—that is, its pumping of ions against their gradients requires the addition of energy from an outside source. That source is adenosine triphosphate (ATP), the principal energy-carrying molecule of the cell.
How are primary and secondary active transport related?
The electrochemical gradients set up by primary active transport store energy, which can be released as the ions move back down their gradients. Secondary active transport uses the energy stored in these gradients to move other substances against their own gradients.
What is group translocation microbiology?
Group translocation is a biological process where a molecule crossing the cell membrane not only gets transported but also gets transformed in itself.
How does oxygen diffuse across the cell membrane?
Inside the red blood cell, oxygen reacts chemically with hemoglobin and is transported by both free and hemoglobin-facilitated diffusion. Oxygen diffuses through the cell membrane and is transported in blood plasma by free diffusion and by convection.
How does oxygen move in and out of cells?
The oxygen molecules move, by diffusion, out of the capillaries and into the body cells. While oxygen moves from the capillaries and into body cells, carbon dioxide moves from the cells into the capillaries. Carbon dioxide is brought, through the blood, back to the heart and then to the lungs.
What process is responsible for the transport of oxygen and carbon dioxide across the alveolar membrane?
Pulmonary ventilation provides air to the alveoli for this gas exchange process. At the respiratory membrane, where the alveolar and capillary walls meet, gases move across the membranes, with oxygen entering the bloodstream and carbon dioxide exiting.
Is carbon dioxide passive or active transport?
Some substances (small molecules, ions) such as carbon dioxide (CO2) and oxygen (O2), can move across the plasma membrane by diffusion, which is a passive transport process.
Why does a golf ball have dimples?
This is a valid question. For years, people believed that smoother golf balls will travel a longer distance. But they eventually found out that the aerodynamics of a spotless ball will not travel the desired distance in spite of applying maximum force.
How many dimples are present in a ball?
There is no definite number as to how many dimples are carved on every golf ball. The number varies between 300 to 500 in most cases. In fact, certain manufactures produce golf balls with different dimples count to derive different results.
How big are these dimples and how much does a golf ball weigh?
While the dimple count may vary with regard to each manufacturer, the same is followed when it comes to the dimple’s depth and circumference. The average depth of a dimple is 0.010 inch and the circumference of the dimple will differ from model to model.
British Golf Ball - The Original
- At the dawn of golf in England and Scotland, players used hard wooden golf balls usually on links golf courses. The firm wooden balls were difficult to control, and golfers switched over to what was known as the featherie in the 18th century. This new golf ball was far softer than the wooden golf ball, because they had feathers inside them, covered with a leather exterior. They were, how…
American Golf Ball - Closer to Today's Ball
- Once the guttie was the standard issue ball in England, a man from Cleveland, Ohio, created a new ball no one had ever seen before, turning the market on its head. This ball gave birth to the modern golf ball we are used to today. It was made with rubber threads almost like elastic bands, around a rubber ball shaped core. That round core of rubber was covered with a material which …
Key Differences Between The British and American Golf Balls
- The American ball, by USGA (United States Golf Association) Rules, must reach a diameter of 1.680 inches and not exceed 1.620 ounces, or 45.93 grams. Until the 1990s, the British governing body, the R&A, allowed the standard use of golf balls less than a diameter of 1.68 inches. These smaller golf balls were nicknamed as the “British ball” by profe...