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harkovskaia [24]
3 years ago
10

Humans have cut and frayed the woven tapestry of Earth’s biodiversity. List and describe three ways.

Biology
1 answer:
Aneli [31]3 years ago
8 0
~over hunting has killed a lot of species
~we genetically modify plants and animals to our liking
~we have introduced a lot of invasive species to different places effecting local wildlife
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When sunlight excites electrons in chlorophyll, how do the electrons change?
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In a paragraph explain what effect very small pores and their diffusion rate would have on the workings and mechanism of a cell
Murrr4er [49]

Answer:

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Explanation:

I hope it helps you

6 0
3 years ago
increasing intracellular cAMP leads to smooth muscle relaxation by: Group of answer choices inhibiting IP3 channels, leading to
kirza4 [7]

Answer:

1. Inhibiting IP3 channels, leading to decreased Ca2 in the sarcoplasm and reduced contraction.  

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Explanation

In smooth muscle, cyclic AMP (cAMP) mediates relaxation because cAMP inhibits a specific kinase required for myosin light chain protein (MLCP) phosphorylation, thereby triggering contraction in the smooth muscles. It has been shown that cAMP inhibits 1,4,5-trisphosphate (IP3)-dependent calcium ions (Ca 2+) release by activation of the cGMP-dependent protein kinase (PKG). PKG proteins act to modulate Ca2+ oscillations by stimulating sarcoplasmic Ca2+-ATPase membrane proteins, increasing Ca2+ in the sarcoplasmic reticulum stores and Ca2+ efflux from the cells, and activate voltage-gated potassium (K) channels, thereby leading to membrane hyperpolarization and reducing Ca2+ entry through Ca2+ channels.

6 0
3 years ago
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Katena32 [7]

Explanation:

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Researchers found that the brain's response time begins to decline at age 24. The descent is a slow, but nonetheless, steady one.

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