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NAFC TEST 2024/2025 UPDATE COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS GET IT 100% RIGHT
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NAFC TEST 2024/2025 UPDATE COMPREHENSIVE QUESTIONS AND VERIFIED ANSWERS GET IT 100% RIGHT
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NAFC TEST 2024/2025 UPDATE COMPREHENSIVEQUESTIONS AND VERIFIED ANSWERS GET IT 100%
RIGHT
Cytology - (correct answer) The study of structure and function of
cells
Homeostasis - (correct answer) The property of a system (Cell,
Tissue, Organ, Organism) either open or closed, that regulates its
internal environment and tends to maintain a stable, constant
condition.
A typical cell.. - (correct answer) -Is surrounded by extra-cellular
fluid, which is the interstitial fluid of the tissue.
-Has an outer boundary called a cell membrane
-Has many components including the cellular organelles. These
organelles carry out all the vital processes required for life.
-Must take in nutrients from the interstitial fluid; use those nutrients to
create all the substances needed to carry on life; secrete any products
meant for use outside the cell; as well as excrete all waste products
Cell Membrane - (correct answer) The outer boundary of a cell
,DNA - (correct answer) Is a sequence of chemical bases that
essentially stores information in a "code" that tells the cell what
proteins to make
When unraveled, how far would the DNA in each cell stretch? -
(correct answer) 2-3 meters long
When unraveled, all of the DNA in a single body would stretch how far?
- (correct answer) From the Earth to the Sun and around 400 times
What is the Structural and Functional Unit of any complex organism -
(correct answer) Cell
Characteristics of Healthy Cells - (correct answer) -Take in only the
nutrients needed to function properly
-Grow to a fairly uniform size and shape
-Multiply only when needed or directed to
-Don't infringe on each other's space
-Communicate and cooperate with each other for the good of the
whole organism
Characteristics of Unhealthy Cells - (correct answer) -Take in all the
nutrients they can get, thereby depriving surrounding cells of vital
nutrients
-Keep growing beyond their normal preprogrammed size and shape.
,-Multiply out of control
-Infringe upon and push into and damage surrounding healthy cells
-Cease to communicate and/or cooperate with other cells or the body
as a whole. This leads to a breakdown in the function and structural
integrity of the tissue or organ involved.
Cell Theory States.. - (correct answer) -Cells are the building blocks
of plants and animals
-All cells are produced by the division of pre-existing cells
-Cells are the smallest units that perform all vital physiological functions
-Each cell maintains homeostasis at the cellular level
-Homeostasis at higher levels, reflects combined, coordinated action of
many cells
-The human body contains many different types of cells
How many DNA are in the body? - (correct answer) Approximately
35,000 genes that make up 300,000 different proteins
Gene Activation - (correct answer) Initiates with Ribonucleic Acid
(RNA) Polymerase binding to the gene. (RNA Polymerase is a large
protein)
Transcription - (correct answer) The formation of Messenger
Ribonucleic Acid (mRNA) from DNA.
, mRNA - (correct answer) Carries instructions from the nucleus to the
cytoplasm.
What are the two types of organelles found in cells? - (correct
answer) Membranous and Non-membranous
Membranous Organelles are surrounded by - (correct answer) Lipid
Membranes
Membranous Organelles also feature - (correct answer) -
Endoplasmic reticulum
-Golgi Apparatus
-Lysosomes
-Peroxisomes
-Mitochondria
Non-Membranous Organelles are - (correct answer) not enclosed by
a membrane and always in touch with the cytosol.
Non-Membranous Organelles also consist of - (correct answer) -
Cytoskeleton
-Microvilli
-Centrioles
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