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Sonja [21]
4 years ago
5

Fat absorption through the plasma membrane of epithelial cells ________.

Biology
1 answer:
erastovalidia [21]4 years ago
5 0

Answer:

C) occurs by simple diffusion because lipids are able to penetrate the hydrophobic fatty acid tails within the plasma membrane

Explanation:

After digestion of lipids, monoglycerides and fatty acids associate with bile salts and phopholipids to form micelles. Micelles are structures that are necessary for the transport the poorly soluble monoglycerides and fatty acids to the surface of the enterocyte. But, micelles cannot be absorbed by epithelial cell, only freely dissolved monoglycerides and fatty acids can. Free fatty acids and monogycerids can just diffuse across the plasma membrane because of their nonpolar nature.

 Some absorption (e.g. for cholesterol) may be facilitated by specific transport proteins.

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Brain is very important part of our body, explain how it work as an organ? Also, explain
jek_recluse [69]

Answer:

the brain helps with moving our limbs and bones such as how im typing this, it helps us remember to blink and breathe and keep our heart pumping blood.

Explanation:

im not actually sure if this is right but i tried, im sorry if its wrong

7 0
3 years ago
What is 0.640 as a fraction in simplest form?<br> Enter the answer by filling in the boxes.
timama [110]

Answer:

16/25

Explanation:

0.640 = 640

____, cancelling one zero, we have

1000

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___, cancelling by 4, we have

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= 16

___

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5 0
3 years ago
Which specialized cells are created from stem cells? Check all that apply.
vampirchik [111]
<h2>Answer:</h2>

I believe the correct answer is all of the cells.

<h2>Explanation:</h2>

All cells usually arise from stem cells. Stem cells have the ability to reproduce, differentiate or specialize into specific stem cells. There are multipotent, totipotent and pluripotent types of stem cells that give rise to specific types of cells.

<h2>Further Explanation:</h2><h3>1. Red and White blood cells:</h3>

These are essential blood cells confined to blood vessels and tissues. Red blood cells (Erythrocytes) function to carry oxygen to tissues and carbondioxide away from tissues while white blood cells (leukocytes) function as defensive barries protecting the body from infections and any type of foreign/pathogenic material. They have multipotent stem cells called multipotent haematopoietic stem cells that further specialize into the common myeloid progenitor and the common lymphoid progenitor. The common myeloid progenitor differentiates into the megakaryocytes that form platelets, erythrocytes (red blood cells), mast cells and myelocytes ( white blood cells that have granules in them i.e. basophils, neutrophils, eosinophuls and monocytes). The common lymphoid progenitor forms lymphocytes which are small types of white blood cells that fight cancers and viruses. Cancers can cause stem cells of specific cells to multiply uncontrollably or suppress the production of specific cells causing adverse health issues.

<h3>2. Muscle cells:</h3>

Muscle cells grow from stem cell precursors depending on their type. There are skeletal muscles (muscles that support bones in their functions), smooth muscles( found in organs such as the lungs) and cardiac muscles (specific only to the heart). Skeletal muscle stem cells are called satellite cells, while cardiac and smooth muscles arise from the cardiac neural crest stem cell.

<h3>3. Neurons</h3>

Neurons are specialized cells for communication in the body and include neurons found in the central nervous system and the peripheral nervous system and glial cells that provide support for them. They arise from the neural stem cells to form common progenitors differentiating into neurons and glial cells.

<h3>4. Epithelial cells</h3>

They are part of the most abundant cells in the body. They populate every organ surface in the body. They arise from the epithelial stem cells forming different types of epithelial cells in regards to the surface they are found. e.g. Keratinized epithelial cells are found in openings and surfaces of the body i.e. the eyes, skin, vagina, mouth and ear canals while non-keratinized are found in internal hollow surfaces such as the lungs, spleen, liver, kidneys.

Level: High School

7 0
3 years ago
Read 2 more answers
Vitamins are nutrients that are not made by living things. true or false
GrogVix [38]
True, as to why your doctor recommends you to eat more vegetables or go outside among other things to get more vitamins and stay healthy.
7 0
4 years ago
How can homologous structures in the forelimbs of these four organisms be used as evidence to suggest that life changes over tim
sergij07 [2.7K]

<span>The answer is ‘They are evidence that all came from a common ancestor and that life changed over time for all these organisms’. The individuals of the ancestor population probably spread out and became separated b geographical features or behavioral modification. Over time, this caused allopatric or/and sympatric speciation. However, these species still bear homologous structures that show this common ancestry. </span>






3 0
4 years ago
Read 2 more answers
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