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2 years ago

Fat absorption through the plasma membrane of epithelial cells ________.

Biology

1 answer:

erastovalidia [21]2 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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I think it’s .c I’m not sure

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2 years ago

The diploid number of chromosomes in the mustard plant, Arabidopsis thaliana, is 10. Knowing this, answer the following question

Maslowich

Answer:

10 chromosomes

Explanation:

Ten (10) chromosomes would be found in each cell of Arabidopsis thaliana during prophase.

The prophase stage represents the first stage of the mitotic division immediately after the interphase. A diploid cell has 2n number of chromosomes and the ploidy level of a cell remains intact throughout the interphase to the prophase stage of mitosis.

At the prophase, the chromosomes of a cell only condense and become visible under the microscope. Each chromosome is seen as being consisting of two sister chromatids joined together by a structure known as the centromere.

Hence, the number of chromosomes in the cells of Arabidopsis thaliana would remain the same even at the prophase stage of mitosis.

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1 year ago

Use the drop-down menus to match each function with the appropriate organelle. Moves proteins and other substances through the c

Mrac [35]

Answer:

Endoplasmic reticulum

Explanation:

The endoplasmic reticulum makes an extensive internal system of membranes in the eukaryotic cells. It makes a system of tubes and sacs that run throughout the cytoplasm. The ER is connected to the nuclear envelop also and serves in the transport of substances and proteins throughout the cells with the help of transport vesicles. For instance, the proteins formed on the surface of rough ER are packed in vesicles that bud off from the surface of rough ER and are carried to the Golgi apparatus for processing.

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2 years ago

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An older adult client tells the nurse, i give myself a mineral oil enema every day. what is the appropriate nursing response?

babunello [35]

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2 years ago

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MaRussiya [10]

Answer:

C. gene B only

Explanation:

Housekeeping proteins are essential for all cells throughout it human body, to maintain basic function. So, if gene B is expressed in two different organs, such as brain and liver, it suggests that B is a housekeeping protein. Examples of this kind of proteins are the ribosomal proteins, RNA polymerases, cytoeskeleton proteins, and some of the mitochondrial proteins, among others.

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2 years ago