Explanation:
Percentage w/v means that weight of solute present in 100 ml of a solution. Hence, 15% w/v means that 15 gram of solute per 100 ml of solution.
Hence, for 2 L (or 2000 mL) preparation the amount of mass will be calculated as follows.
= 300 g
Thus, we can conclude that weight of Tris-HCL required is 300 g.
Since the average osmotic pressure of the brain is 300mM and the concentration of the solution is 280mM, that means there is 20mM difference between the brain cells and CSF. This will induce osmosis and cause water to move from the CSF into the brain until the concentration becomes same. Assuming brain volume is 1200ml and the CSF constantly replaced, then the estimation of fluid should be: 20mM/300mM * 1200ml= 80 mlIf it made percent it should be: 80ml / 1200ml= 6.67%
Answer:
The correct answer is D. fitness
Explanation:
The ability of an organism to survive up to reproductive age and produce its offspring is called biological fitness. The fitness of any individual can be measured by the genetic contribution of that individual into the next generation.
This means that the higher the number of offspring produced by any individual higher would be its biological fitness. By averaging the fitness of population members the fitness of a population can be calculated. So fitness is the correct answer.
Ok so let me help you with this: Desertification is the process in which an environment becomes drier in climate, typically causing plant and animal life to decrease significantly. Researchers have found that areas around current deserts are becoming desertified, therefore expanding the desert.<span> Areas that may have once had adequate rain may now not receive much rain at all, causing desertification. I know this is going to be useful</span>
Answer:
The neuron will fire an action potential.
Explanation:
A neuron is a cell in the brain that transmit signals to other nerve cells.
The depolarization of a neuron occurs when the neuron moves to a cell membrane with a more positive value which makes it more likely to fire an action potential.
