In skin, the cells of the epidermis connect to the basal lamina through cellular junctions known as hemidesmosomes. Select the cytoskeletal element that helps maintain the integrity of this connection. intermediate filaments both intermediate microtubules and microfilaments microfilaments only microtubules only

The correct answer is ''intermediate filaments.''

Explanation:

The intermediate filaments are made up of thick and resistant protein fibers, with an intermediate thickness between that of the microfilaments and that of the microtubules. They provide mechanical resistance to the cell, avoiding the rupture of the membranes of the cells subjected to stress. The macromolecules that make up the basal lamina interact specifically with specific receptor proteins present in the plasma membrane of the cell base, which in turn interact in the cytoplasm with filaments of the cell cytoskeleton. When the junction is associated with intermediate filaments, it is a hemidesmosome and when it is the actin cytoskeleton that is anchored in the junction, it is focal contacts. Hemidesmosomes are formed by a dense plate attached to the cell membrane, in which the intermediate filaments are inserted by joining connection proteins, such as desmoplakin, which connect to the cytoplasmic portion of the integral proteins of the cell membrane, which belong to the family of integrins.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

it’s lava came from an explosive eruption