Biology Questions and Answers
Basic Histology
- What is the logical order in
which the concepts of atoms,
molecules, cells... up to
biosphere are associated?
Atoms fothat form tissues that form molecules that form organs thatrm cells (^)
form systems.constitute individuals that form Systems, in their turn,
populations that compound (biological)
communitiescomponents of that form the bioticecosystems. All
ecosystems of earth form the biosphere.
- From the zygote,
pluricellular organisms are
formed by serial mitosis.
Would this formation be
possible if each cell made by
mitosis had an identical life in
relation to its antecedent
cells? How did evolution solve
that problem?
The formation pluricellular organisms woof complex uld not beand distinct
possible if only daughter cells with amitosis in embryos prn identicaloduced life (^)
history as the mother cell, since there
would not be differentiation anstructural or functional specializationd (^)
among cells.
Evolution the cellular solved differentiation prthe problem crocess byeating
which, motivated by stimulus not yet
well-known by science, different and
specialized cdifferent tissues,ell lineages gave birth to organs and systems (^)
that, as a whole, form the pluricellular
organisms.
Cellular differentiation probably is a
very intricate prinactivates some gocess that activatesenes within the cell in and (^)
response to some stimulus.
- What are the main types of
animal tissue?
The main animal cell tissues are the
epithelial tissue, tmuscle tissue and the connective tissue.he nervous tissue, the - What are epithelial tissues?
What are their general
function and how is that
function associated to the
features of the tissue?
Epithelial tissues, also called are tissues specialized in the coverinepithelia,g of (^)
external and internal surfaces of the
body.
The general function of the epithelium is
to provide protection impermeability (or selectiveand (^)
permeability) to the covered structure.
This justifies thfeatures: the cellular je epithelium's typicaluxtaposition
forming layers of very proximate cells
with diminishespace between each two nd or none intercellulareighbor cells.
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