What is the carrying capacity of an ecosystem?

3. Large molecules and wastes move through the membrane through

madreJ [45]

Answer: Large molecules and wastes move through the membrane through forms of active transport- endocytosis and exocytosis.

Explanation:

Molecules are moved across the cell membrane via different mechanisms like diffusion, facilitated diffusion and passive transport; however, some very large molecules require specialized types of active transport to cross over- these are endocytosis and exocytosis.

During endocytosis large molecules cells and cell fragments moved across the plasma membrane through a process of invagination; piece of the external cell membrane falls into itself and forms a small pocket that surrounds the target molecule this breaks off from the membrane to form an intracellular vesicle. Different methods of endocytosis such as phagocytosis, pinocytosis and receptor-mediated endocytosis, take in cells, water and targeted substances respectively.

Like endocytosis, the particles (signal proteins, neurotransmitters and waste material) are surrounded by a phospholipid membrane. However, in exocytosis, this membrane is formed in the cytoplasm, and merges with the plasma membrane’s interior in a process opposite to endocytosis; material is removed from the cell and exported into the cell’s exterior called the extracellular space.

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3 years ago

Which of these processes is carried out in the same way in both plants and animals?

weqwewe [10]

Cellular Respiration is a process carried out the same in animals and plants.

8 0

3 years ago

Recovering the Romanovs <- your second lab link On the lab page, please navigate using the top and bottom modules. For exampl

77julia77 [94]

Answer:

Explanation:

Who were the Romanovs?The Romanovs were high ranking aristocrats in Russia during the sixteenth and seventeenth centuries,The Romanov was the second dynasty to rule Russia, and also the last ruling Russia from 1613 until the Russian Revolution of 1917

2. Who was Anna Anderson?An impostor who claimed to be Grand Duchess Anastasia of Russia

Who did she claim to be? Anna Anderson had claimed to be the missing be the Grand Duchess Anastasia Nikolaevna of Russia(Anastasia Romanov)

What evidence supported this claim? the evidence that supported her claim was that she had the same hair and eye color,the same height, distinctive body markings, and a deformed foot just as the Romanov princess had.

3. What did scientists find in the burial site? The scientist found nine skeletons.

What did they not find?They did not find two of them which was believe to be that of Princess Anastasia and her brother Prince Alexei

4. What did the mitochondrial DNA testing show? DNA testing showed that it certainly was Nicholas, Alexandra and the three children, these was discovered through the bones found in the grave

What do scientists believe happened to Anastasia?Scientist believed that Princess Anastasia along with her brother Prince Alexei were cremated aright after they were being killed

5. Why do you think it took so long for this mystery to be solved? it took so long for this mystery to be solved because the technology available can not be compare to DNA technology because modern technology and advancement had made it more better and convenient .

What factors played a role? DNA technology played a role

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3 years ago

Which conservation effort helps to conserve trees?

garri49 [273]

I'd think it's probably the recycling of newspapers, as trees are making of paper can be a reason for deforestation. With recycling of newspapers, fewer trees need to be cut down.

8 0

3 years ago

Read 2 more answers

An inhibitory stimulus has occurred. B. Chemically gated potassium channels have opened. C. Excessive potassium has diffused out

andrezito [222]

Given question is incomplete. Complete question has been attached.

Answer:

C. Excessive potassium has diffused out causing hyperpolarization.

Explanation:

The nerve action potential can be divided into following stages:

Stimulus is detected by the cell in resting stage.
Sodium channels in the membrane open from where influx of sodium ions occur which is called depolarization
After a while, sodium channels close and potassium channels open from where efflux of potassium ions occur which is called repolarization.
The membrane potential further lowers due to continous efflux of potassium ions which is called hyperpolarization.
After a while potassium channels close and membrane returns to its resting stage.

In the given figure, stage 4 depicts hyperpolarization because the membrane potential has dropped to the lowest point below -70mV. Hence, option C is correct.

7 0

3 years ago