FINAL FINAL FINAL FINAL Flashcards
contains nucleic acids, proteins, carbs, and lipids composed of cells grow and reproduce use energy and raw materials respond to environment maintain homeostasis have adaptive traits
7 characteristics of life
smallest unit of life
cells
relatively constant and self correcting internal environment
homeostasis
list the four kingdoms within the domain eukarya
protists fungi plants animals
method for gathering information and acquiring knowledge
scientific method
classifications of humans
domain- eukarya kingdom- animals phylum- chordates class- mammals order- primates family- hominids genus- homo species- homo sapiens
steps in the scientific method
observe and ask a question form hypothesis test experiment and collect new data draw conclusions repeat as needed possibly form theory
goes through all the steps of the experiment but lacks factor being tested
control
factor being tested
experimental/ independent
change/effect that occurs because of experimental variable
responding/dependent
6 most common elements found in the body
O, C, H, N, Ca, P
smallest unit of an element
atom
contains protons and neutrons
nucleus
+
protons
0
neutrons
- ; move around the nucleus
electrons
2 or more atoms bond to each other
molecule
a molecule with atom of at least two different elements bonding
compound
atoms share electrons to complete outer shell
covalent bond
atom or group of atoms that carries either a + or - electrical charge
ionic bonds
very weak bond/ easily broken
hydrogen bond
result from the transfer of electrons between atoms
ionic bond formation
pH 7.0
neutral
pH
acid
pH> 7.0
base
pH of blood
7.4
4 groups of polymers/macromolecules found in living things
carbs lipids protein nucleic acid
3 best know monosaccrides
glucose, frutose, galactose
permanent disruption of protein structure/shape - loss of function
denaturation
what causes denaturation
caused by high temps or changes in pH
what is the function of enzymes
speeds up chemical reaction
how are most enzymes named
“ase” and named for their subtrate
genetic info in cells- in chromosomes
DNA
converts the genetic info in DNA into proteins
RNA
3 phosphate groups
ATP
TWISTED DOUBLE STRAND
DNA
single strand
RNA
adenine, ribose, (adenosine)
ATP
deoxyribonucleic acid
DNA
ribonucleic acid
RNA
adenosine triphosphate
ATP
cell- simpler and smaller; primary bacteria
prokaryotic
cells of all other organisms, including animals
eukaryotic
e.coli
prokaryotic
plants, animals
eukaryotic
2 major components of the plasma membrane
phospholipid and proteins
thin outer covering of cell
plasma membrane
regulates movement of substances into and out of cell
selectively permeable
random movement of a substance from a region of higher concentration to a region of lower concentration
simple diffusion
type of diffusion in which H2O moves across a membrane from a region of high H2O concentration to a region of lower H2O concentration
osmosis
movement of substances across membrane from a lower conc to a higher conc with the aid of a carrier protein
active transport
movement of a substance from a region of higher conc to a region of lower conc to a region of lower conc with the aid of a membrane protein
facilitated diffusion
movement when large substances leave cell
exocytosis
movement when cell engulfs substance
endocytosis
cell eating
phagocytosis
cell drinking
endocytosis
is a passive movement
facilitated transport
is an active movement
active transport
H2O moves out of cell
hypertonic
H2O moves into and out of cell equally
isotonic
H2O moves into cells
hypotonic
jellylike solution inside cell
cytoplasm
contains genetic info (DNA) that is passed from generation to generation
nucleus
separates nucleus from cytoplasm
nuclear envelope
openings in the nuclear envelope
nuclear pore
protein synthesis- where amino acids are assembled into proteins
ribosomes
system of interconnecting membrane channels
endoplasmic reticulum (ER)
set of interconnected, flattened membranous sacs
golgi complex
membrane bound vesicles
lysosome
energy needs of cell
mitochondria
complex network of fibers within cytoplasm
cytoskeleton
short and numerous- sweeps stuff
cillia
long- usually just one; move cell
flagella
how many chromosomes do have cells have
46 chromosomes - 23 pairs
the “powerhouse” of the cell
mitochondria
cellular energy is in what form
food?
series of many chemical reactions where O2 is required ; aerobic respiration
cellular respiration
the breakdown of glucose without o2
fermentation
4 phases of cellular respiration
glycolysis
transition reaction
citric acid cycle
electron transport chain
is cellular respiration or fermentation more energy efficient
cellular respiration
what happens to the co2 produce during cell respiration
diffused out of cells into blood and taken to lungs to be exhaled
when does fermentation occur
process stops at end of glycolysis
list the list of how life is organized from cell to organ systems
cells-tissues-organs-organ system
cover body surfaces, lines body cavities and organs, and forms glands
epithelial tissue
provides body and its organs with protection and support
connective tissue
responsible for body movement and movement of substances through the body
muscle tissue
conducts nerve impulses from one part of the body to another
nervous tissue
attached to bone
skeletal
only found in heart
cardiac
in walls of hollow organs
smooth
muscle tissues that are involuntary
cardiac smooth
muscle tissue that is voluntary
skeletal
makes up brain, spinal cords, and nerves
nervous tissue
consists of skin, hair, nails, sweat and oil glands
integumentary system
two systems that maintain homeostasis in the body
nervous and endocrine system
what happens if homeostasis fails
illness or death
support movement protection storage of minerals storage of fat blood cell formation
functions of bones
examples of bones used for protection
skull, sternum, ribs
what minerals are stored in bones
calcium and phosphorus
where are blood cells formed
in red bone marrow
why is bone a living tissue
it has many cells -osteocytes
how many bones do we have in our body
206
places where bones meet
joints
movement posture support internal organs move blood and lymph generates heart
functions of skeletal muscle
integrates and coorindates all the bodys varied activities
nervous sytem
conduct info toward brain and spinal cord
sensory neurons
carry info away from brain and spinal cord to an effector
motor neurons