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Doss [256]
3 years ago
9

What protects and nourishes a developing fetus?

Biology
1 answer:
statuscvo [17]3 years ago
3 0
The uterus protects and nourishes the fetus
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The structure of the cell membrane allows it to be selectively permeable. What is the name for the larger, brown structure in th
Anika [276]

Explanation:

B) protein channel

Lipids are composed of fatty acids which form the hydrobic tail and glycerol which forms the hydrophilic head; glycerol is a 3-Carbon alcohol which is water soluble, while the fatty acid tail is a long chain hydrocarbon (hydrogens attached to a carbon backone) with up to 36 carbons.

Their polarity or arrangement can give these non-polar macromolecules hydrophilic and hydrophobic properties. Via <em>diffusion,</em> small water molecules can move across the phospholipid bilayer acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds. The hydrophilic heads of the bilayer are attracted to water while their water-repellent hydrophobic tails face towards each other- allowing molecules of water to diffuse across the membrane along the concentration gradient.

Transmembrane proteins are embedded within the membrane from the extracellular fluid to the cytoplasm, and are sometimes attached to glycoproteins (proteins attached to carbohydrates) which function as cell surface markers. Carrier proteins and channel proteins are the two major classes of membrane transport proteins.

  • Carrier proteins (also called carriers, permeases, or transporters) bind the specific solute to be transported and undergo a series of conformational changes to transfer the bound solute across the membrane. Transport proteins spanning the plasma membrane facilitate the movement of ions and other complex, polar molecules  which are typically prevented from moving across the membrane.
  • Channel proteins which are pores filled with water versus enabling charged molecules to diffuse across the membrane,  from regions of high concentration to regions of lower concentration. This is a passive part of facilitated diffusion

Learn more about membrane components at brainly.com/question/1971706

Learn more about plasma membrane transport at brainly.com/question/11410881

#LearnWithBrainly

4 0
3 years ago
describe how turning off the electric current in an industrial electromagnet affects its magnetic field
miss Akunina [59]
It makes it stronger.

- I hope this helps! (:
6 0
3 years ago
Read 2 more answers
Under what conditions can igneous rock be transformed into metamorphic rock? A) if it is forced deep into Earth, where it melts
xeze [42]

B)if it is heated and put under pressure for long periods of time

If the temperature was too hot, it would become magma instead and the cycle would start all over again.

5 0
3 years ago
________ the dolphin lives in the sea, it is not a fish - it's a mammal.
lina2011 [118]
 Although the dolphin lives in the sea, it is not a fish - it's a mammal.

It makes the most sense if you read it aloud. 
7 0
3 years ago
Predict the genotypic ratios of the offspring from crossing the following:
hichkok12 [17]

Answer:

1:2:1

Explanation:

1 chance of having the genotype TT

2 chances of having the genotype of Tt

1 chance of having the genotype of tt

8 0
3 years ago
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