Female Reproductive System: Anatomy and Function
Female Reproductive System
Ovarian Development and Function
The female reproductive system begins to form and function in utero at 20 days of gestation. Its activity is cyclical and lasts for many years.
Ovaries
The ovaries are almond-shaped organs that are initially pink but eventually shrivel and darken. Inside, there are many primary follicles, which, after a process, become Graafian follicles.
Fallopian Tubes
The fallopian tubes are two canals that connect to the uterus. They are broader at the ovarian
Read MoreBacterial Differentiation Techniques: Blood Agar, Catalase, Oxidase
Blood Agar
Blood agar differentiates bacteria based on what reaction?
Blood agar is differential. The medium contains 5% sheep red blood cells that are added to trypticase soy agar. It is a rich medium that allows many organisms to grow, and it is differential for the action of bacterial enzymes on red blood cells.
Shows different types of hemolysis.
Alpha, beta, gamma
Beta-hemolytic bacteria produce enzymes that are able to completely lyse red blood cells, which causes a clear transparent zone in the
DNA Replication, Transcription, and Translation Processes
DNA Replication
- At the origin of replication, DNA is unzipped by helicase. Single-strand DNA-binding proteins prevent the double helix from forming again.
- Primase adds RNA primers as a binding site for DNA polymerase.
- DNA polymerase adds nucleotides to synthesize the new strand of DNA at the 3′ end.
- Removal of primers by exonuclease.
- Filling the gap by DNA polymerase. The leading strand is synthesized continuously in the 5′ to 3′ direction, and the lagging strand is synthesized discontinuously in fragments
Sexual Reproduction, Vision Defects, and Human Biology
Advantages of Sexual Reproduction
In sexual reproduction, more variations are produced. Thus, it ensures the survival of species in a population. The newly formed individual has characteristics of both parents. Variations are more viable in sexual mode than in asexual mode. This is because, in asexual reproduction, DNA has to function inside the inherited cellular apparatus.
The Testes
The testes are the male reproductive organs that are located outside the abdominal cavity within a pouch called the
Read MoreNervous and Digestive Systems: Invertebrates & Vertebrates
Nervous System
Function: The nervous system receives, integrates, and transmits information from the external and internal environment, as well as coordinating and monitoring responses. Receptors, sensory nerve pathways, modulators, motor nerve pathways, and effectors are involved.
Nerve Impulse
A nerve impulse is the transmission of signals coming from neurons. It consists of a resting potential, depolarization, action potential, and repolarization. The excitability threshold is the minimum intensity
Read MoreCell Biology: Organelles, Molecules, and Metabolism
Cellular Components and Functions
- Vacuole: An organelle in plant cells for water storage, secretion, and waste.
- Eukaryotic Cell: Contains genetic material enclosed by a nuclear membrane and membranous organelles.
- Prokaryotic Cell: Hereditary material dispersed in the cytoplasm, lacking membranous organelles.
Cell Theory
The cell is the structural and functional unit of all living organisms.
Organelles
- Membranous Organelle: Cell structure with one or two membranes, fulfilling specific functions.
- Nucleus: