Myself birthing my 8lb 2oz son :)

CLIPSHARE

Added by: heythereelizabeth
Tags: Natural Child birth
Date: 2010-07-13

This video show DNA replication which is a fundamental process occurring in all organisms to copy their DNA. Enzymes needed for the process are discussed. In a cell, DNA replication must happen before cell division in order to keep genetic material.

CLIPSHARE

Added by: sana
Tags: Replication DNA nucleotides
Date: 2007-05-15

An ATP synthase is a general term for an enzyme that can synthesize adenosine triphosphate (ATP) from adenosine diphosphate (ADP) and inorganic phosphate by utilizing some form of energy.

CLIPSHARE

Added by: benchwork
Tags: ATP synthase energy in cell enzymes
Date: 2007-03-28

Day 1: fertilization: all human chromosomes are present; unique human life begins. Day 6: embryo begins implantation in the uterus. Day 22: heart begins to beat with the child's own blood, often a different type than the mothers'. Week 3: By the end of third week the child's backbone spinal column and nervous system are forming. The liver, kidneys and intestines begin to take shape. Week 4: By the end of week four the child is ten thousand times larger than the fertilized egg. Week 5: Eyes, legs, and hands begin to develop. Week 6: Brain waves are detectable; mouth and lips are present; fingernails are forming. Week 7: Eyelids, and toes form, nose distinct. The baby is kicking and swimming. Week 8: Every organ is in place, bones begin to replace cartilage, and fingerprints begin to form. By the 8th week the baby can begin to hear. Weeks 9 and 10: Teeth begin to form, fingernails develop. The baby can turn his head, and frown. The baby can hiccup. Weeks 10 and 11: The baby can "breathe" amniotic fluid and urinate. Week 11 the baby can grasp objects placed in its hand; all organ systems are functioning. The baby has a skeletal structure, nerves, and circulation. Week 12: The baby has all of the parts necessary to experience pain, including nerves, spinal cord, and thalamus. Vocal cords are complete. The baby can suck its thumb. Week 14: At this age, the heart pumps several quarts of blood through the body every day. Week 15: The baby has an adult's taste buds. Month 4: Bone Marrow is now beginning to form. The heart is pumping 25 quarts of blood a day. By the end of month 4 the baby will be 8-10 inches in length and will weigh up to half a pound. Week 17: The baby can have dream (REM) sleep. Week 19: Babies can routinely be saved at 21 to 22 weeks after fertilization, and sometimes they can be saved even younger. Week 20: The earliest stage at which Partial birth abortions are performed. At 20 weeks the baby recognizes its' mothers voice. Months 5 and 6: The baby practices breathing by inhaling amniotic fluid into its developing lungs. The baby will grasp at the umbilical cord when it feels it. Most mothers feel an increase in movement, kicking, and hiccups from the baby. Oil and sweat glands are now functioning. The baby is now twelve inches long or more, and weighs up to one and a half pounds. Months 7 through 9: Eyeteeth are present. The baby opens and closes his eyes. The baby is using four of the five senses (vision, hearing, taste, and touch.) He knows the difference between waking and sleeping, and can relate to the moods of the mother. The baby's skin begins to thicken, and a layer of fat is produced and stored beneath the skin. Antibodies are built up, and the baby's heart begins to pump 300 gallons of blood per day. Approximately one week before the birth the baby stops growing, and "drops" usually head down into the pelvic cavity.

CLIPSHARE

Added by: watchme
Tags: fertilization
Date: 2007-11-23

The cell is the structural and functional unit of all known living organisms, and is sometimes called the "building block of life." Some organisms, such as bacteria, are unicellular (consist of a single cell). Other organisms, such as humans, are multicellular. (Humans have an estimated 100 trillion or 1014 cells; a typical cell size is 10 µm; a typical cell mass is 1 nanogram.) The largest known cell is an ostrich egg.

CLIPSHARE

Added by: second
Tags: cell celllife AmasingAnimation
Date: 2007-07-30

Watch an animation that shows how the human egg is produced and fertilized.

CLIPSHARE

Added by: cagatay
Tags: sexuality conception
Date: 2009-05-30

Child Birth Video

CLIPSHARE

Added by: cagatay
Tags: Child Birth Video
Date: 2009-06-29

A Southern blot is a method routinely used in molecular biology to check for the presence of a DNA sequence in a DNA sample. Southern blotting combines agarose gel electrophoresis for size separation of DNA with methods to transfer the size-separated DNA to a filter membrane for probe hybridization. The method is named after its inventor, the British biologist Edwin Southern. Other blotting methods (i.e., western blot, northern blot, southwestern blot) that employ similar principles, but using RNA or protein, have later been named in reference to Southern's name. As the technique was eponymously named, Southern blot should be capitalized as is required for proper nouns, whereas northern and western blots should not.text ref wikipedia

CLIPSHARE

Added by: mnazirokur
Tags: southern blot
Date: 2009-03-29

DNA and RNA are long chain polymers of nucleotide bases. DNA molecule consists of two strands arranged in a helical structure whereas RNA is composed of a single strand. This video presents comparisons of DNA and RNA structures. Edited by Ashraf.

CLIPSHARE

Added by: technician
Tags: DNA RNA
Date: 2007-09-13

Myosin cross-bridge binds at the myosin cross-bridge binding site of actin. ATP bound to the myosin cross-bridge is then broken down to ADP and inorganic phosphate. The energy released during this reaction, creates power stroke for the myosin cross-bridge to move the next actin molecule.Edited by Ashraf

CLIPSHARE

Added by: mnazirokur
Tags: Role of myosin cross-bridge in the contraction of muscle
Date: 2008-03-30

Actin and myosin cross-bridge cycling causes muscle contraction. Contraction may occur voluntarily of involuntarily. Voluntary contraction is controlled by the impulses generated in the brain and involuntary reflexes are initiated by the spinal cord. Edited by Ashraf

CLIPSHARE

Added by: mnazirokur
Tags: contraction
Date: 2008-03-30

Helicases separates two strands of nucleic acid into their corresponding single chain. This process uses energy derived from hydrolysis of ATP. This video explains the structure of a viral helicases. Edited by Ashraf Many cellular processes (DNA replication, RNA transcription, DNA recombination, DNA repair, Ribosome biogenesis) involve the separation of nucleic acid strands. Helicases are often utilized to separate strands of a DNA double helix or a self-annealed RNA molecule using the energy from ATP or GTP hydrolysis. They move incrementally along one nucleic acid strand of the duplex with a directionality specific to each particular enzyme. There are many helicases (14 confirmed in E. coli, 24 in human cells) resulting from the great variety of processes in which strand separation must be catalyzed.[citation needed] Helicases adopt different structures and oligomerization states. Whereas DnaB-like helicases unwind DNA as donut shaped hexamers, other enzymes have been shown to be active as monomers or dimers. Their precise mechanisms of action remain unclear. Text Reff: http://en.wikipedia.org/wiki/Helicase

CLIPSHARE

Added by: benchwork
Tags: DNA helicase replication enzimes
Date: 2007-03-25

Transcription of some genes can be induces by specific inducer molecules. Lac operon is an example of such inducible gene which is turned on by lactose present in the cells. This video explains how lactose initiates transcription of lac operon. Edited by Ashraf.

CLIPSHARE

Added by: mnazirokur
Tags: lac operon mechanism E.coli inducable genes
Date: 2007-03-17

The western blot (alternatively, immunoblot) is an analytical technique used to detect specific proteins in a given sample of tissue homogenate or extract. It uses gel electrophoresis to separate native or denatured proteins by the length of the polypeptide (denaturing conditions) or by the 3-D structure of the protein (native/ non-denaturing conditions). The proteins are then transferred to a membrane (typically nitrocellulose or PVDF), where they are probed (detected) using antibodies specific to the target protein.[1] [2] There are now many reagent companies that specialize in providing antibodies (both monoclonal and polyclonal antibodies) against tens of thousands of different proteins[3]. Commercial antibodies can be expensive, although the unbound antibody can be reused between experiments. This method is used in the fields of molecular biology, biochemistry, immunogenetics and other molecular biology disciplines. Other related techniques include using antibodies to detect proteins in tissues and cells by immunostaining and enzyme-linked immunosorbent assay (ELISA). The method originated from the laboratory of George Stark at Stanford. The name western blot was given to the technique by W. Neal Burnette[4] and is a play on the name Southern blot, a technique for DNA detection developed earlier by Edwin Southern. Detection of RNA is termed northern blotting and the detection of post-translational modification of protein is termed Eastern blotting.

CLIPSHARE

Added by: mnazirokur
Tags: western blot
Date: 2009-03-29

Lecture Two—Hermaphrodites: The Safer Sex, by Barbara J. Meyer, Ph.D. www.hhmi.org

CLIPSHARE

Added by: tubeman
Tags: sexdeterminationlecture2
Date: 2007-09-22

Video of mitosis Mitosis Wiki reff: Mitosis is the process by which a cell duplicates the chromosomes in its cell nucleus, in order to generate two, identical, daughter nuclei.It is generally followed immediately by cytokinesis, which divides the nuclei, cytoplasm, organelles and cell membrane into two daughter cells containing roughly equal shares of these cellular components. Mitosis and cytokinesis together define the mitotic (M) phase of the cell cycle, the division of the mother cell into two daughter cells, each with the genetic equivalent of the parent cell. cell cycle

CLIPSHARE

Added by: bio_david
Tags: mitosis
Date: 2008-04-16

Sperm and egg fusion is called fertilization. It takes place in tube. After fertilization zygote begin to multiply, staying clustered together in a ball. This ball of cells, called a blastocyst, slowly makes its way down to the uterus (three or four days after ovulation) and burrows into the uterine wall.

CLIPSHARE

Added by: okur
Tags: egg fertilization
Date: 2007-05-28

This is a video that I merged from the videos on the site http://www.ehd.org to make a full explanation of the embryonic development of the human, from the fertilization and all that stuff. zygote blastocist hCG pregancy mitosis meiosis implantation fertilization

CLIPSHARE

Added by: ktycat
Tags: embryo
Date: 2008-04-20

How are proteins synthesized? This interactive animation will help you to understand the process. For more information about protein synthesis: Legend: Process whereby DNA encodes for the production of amino acids and proteins. This process can be divided into two parts: 1. Transcription Before the synthesis of a protein begins, the corresponding RNA molecule is produced by RNA transcription. One strand of the DNA double helix is used as a template by the RNA polymerase to synthesize a messenger RNA (mRNA). This mRNA migrates from the nucleus to the cytoplasm. During this step, mRNA goes through different types of maturation including one called splicing when the non-coding sequences are eliminated. The coding mRNA sequence can be described as a unit of three nucleotides called a codon. 2. Translation The ribosome binds to the mRNA at the start codon (AUG) that is recognized only by the initiator tRNA. The ribosome proceeds to the elongation phase of protein synthesis. During this stage, complexes, composed of an amino acid linked to tRNA, sequentially bind to the appropriate codon in mRNA by forming complementary base pairs with the tRNA anticodon. The ribosome moves from codon to codon along the mRNA. Amino acids are added one by one, translated into polypeptidic sequences dictated by DNA and represented by mRNA. At the end, a release factor binds to the stop codon, terminating translation and releasing the complete polypeptide from the ribosome Text Reff: http://www.accessexcellence.org/RC/VL/GG/protein_synthesis.html

CLIPSHARE

Added by: tubeman
Tags: proteinsynthesis
Date: 2007-04-01

NurseReview.Org for more animation ... NurseReview.Org Animation on Enema atria nclex review cgfns nle medical physical science medicine

CLIPSHARE

Added by: arsinsol
Tags: NurseReview.Org Animation on Enema atria nclex review cgfns nle medical physical science medicine
Date: 2009-04-24