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True [87]
3 years ago
6

What is not a characteristic of the cortical nephrons?

Biology
1 answer:
Pani-rosa [81]3 years ago
3 0

Answer:

Their nephron loop is closely wrapped with vasa recta.

Explanation:

Cortical nephrons are located in the cortex.

They form 85% of all the nephrons in the kidney. They are located mostly within superficial cortex of kidney. The loop of henle of a cortical nephron is relatively short and hence not closely wrapped with vasa recta. Efferent arteriole delivers blood to a network of peritubular capillaries.

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Its the big blue whale
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A certain buffer is made by mixing a weak acid HA and its conjugate base A–. When HA is present at a concentration of 0.5 mM and
MAVERICK [17]

Answer:The ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

Explanation:

The dissociation constant for formic acid = K_a=1.8\times 10^{-4}

Concentration of HA= 0.5 mM

Concentration of A^-= 0.1 mM

pH = 6.16

First we have to calculate the value of K_a.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[A^-}{[HA]}

Now put all the given values in this expression, we get:

6.16=pK_a+\log (\frac{[0.1]}{0.5})

pK_a=6.86

To calculate the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02.

Using Henderson Hesselbach equation :

7.02=6.86+\log \frac{[A^-]}{[HA]}

7.02=6.86+\log \frac{[A^-]}{[HA]}

\frac{[A^-]}{[HA]}=1.44

\frac{[HA]}{[A^-]}=0.69

Thus the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

7 0
2 years ago
Sam and his Dad were trying to combat the fire ants in the backyard. They tried several brands of fire ant "killing" chemicals b
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Why does plain grits work better than chemicals that are supposed to be for killing ants.
5 0
3 years ago
How does energy flow in a food chain
yulyashka [42]

Answer:

Energy flow in ecosystem occurs by food chain from producer to consumers. ... Then energy is transfered from producers to consumers, called as heterotrophs. Primary consumers are called as herbivores. Herbivores are eaten up by secondary consumers, called as carnivores.

Explanation:

7 0
2 years ago
Help me this is science question
il63 [147K]

Answer:

Claim(One Sentence): Overpopulation and Underpopulation can lead to the demise of particular species, however if the population remains consistent, there is a consistency in the food chain.

Claim: The more grass, the more rabbits. This is because there is abundant grass for rabbits to feed off of. Snakes eat rabbits, the more rabbits, the more food for snakes. And therefore, helps sustain the population of snakes. Hawks eat snakes. The more snakes the more food for the hawks. And the more hawks there are, because there is more food to provide for more hawks. The same pattern goes if there is a decrease. Overpopulation of one species could also cause a disruption and a decrease or a wipe out of a species in a a certain area.

Evidence: Lets look at time 0.0 and time 3.0. Time 0, has a grass population, of 27303 with 2567 rabbits,278 snakes, and 41 hawks. Looking at time 3.0, there is more grass, 28353, less rabbits, 2399, more snakes, 316, and less hawks, 28. This supports my claim because there is a relatively consistent population of rabbits, because there is an abundance of grass. However, in time 3 we see that there are less rabbits. This is because there are more snakes, and the more snakes, the less rabbits, because more rabbits are being consumed at a higher pace.  This is the same with the snakes. The more hawks the more snakes being consumed, but the less hawks the less snakes being consumed.

Reasoning: Population affects population. Meaning that the more of something could mean the less of something.

Scientific Explanation: Final CER: Population greatly affects changes in the food chain. There could be too much of something that could lead to the demise of something else. If everything is equally balanced, there is an abundance of everything, and the food chain can continue smoothly. However if there is an underpopulation, animals die out, and the ones above them in the chain also die out because there is not enough to feed off of.

Explanation:

Hoped this helps.

6 0
2 years ago
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