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General Biology: Definitions and explanations page 18 PDF | Download eBooks

Learn general biology terms with definitions and explanations, biology terminologies (Page 18) for biology degree programs.


  1. What is Passive immunity?
    A different type of immunity results when the igg antibodies in the blood of a pregnant ...
  2. What is Immunization?
    Immunization is the process by which an individual's immune system becomes encouraged or strengthens against an ...
  3. What are Monoclonal antibodies?
    Monoclonal antibodies are antibodies that are made by identical immune cells that are all clones of ...
  4. What is Immune rejection?
    A good example of immune rejection is the skin transplanted from one person to a genetically ...
  5. What is Allergy?
    Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the ...
  6. What is Autoimmune response?
    Such a loss of self-tolerance has many forms. for example in systemic lupus erythematosus, commonly called ...
  7. What is Rheumatoid arthritis?
    Rheumatoid arthritis is a long-term autoimmune disorder that primarily affects joints. it normally results in warm, ...
  8. What is Inborn immunodeficiency?
    Depending on the specific defect, either innate or adaptive defenses - or both - may be ...
  9. What is Acquired immunodeficiency?
    Drugs used to fight autoimmune diseases or prevent transplant rejection suppress the immune system, leading to ...
  10. What is Pandemic?
    A pandemic is an epidemic of disease that has spread across a large region; for instance ...
  11. What is Latency?
    Latent viruses do not trigger an adaptive immune response everince production of most viral proteins and ...
  12. What is Human Immunodeficiency Virus?
    Hiv virus has an elaborate pathogenesis. once introduced into the body, hiv infects helper t cells ...
  13. What is Osmoregulation?
    Osmoregulation is the active regulation of the osmotic pressure of an organism's body fluids which happens ...
  14. What is Osmolarity?
    Osmolarity is another name for osmotic concentration which measures the solute concentration. it is caluculated as ...
  15. What is Anhydrobiosis?
    The term anhydrobiosis is most usually used for the desiccation acceptance or tolerance seen in certain ...
  16. What are Malpighian tubes?
    The malpighian tubule system is a type of excretory and osmoregulatory system found in some insects, ...
  17. What is Kidney?
    The kidneys are two bean-shaped organs found in vertebrates. they are located on the left and ...
  18. What is Ureter?
    In human anatomy, the ureters are tubes made of smooth muscle fibers that expel urine from ...
  19. What is Urinary bladder?
    The urinary bladder is a organ that is hollow and muscular in humans and some other ...
  20. What are Nephrons?
    The nephron is the microscopic structural and functional unit of the kidney and comprises of a ...
  21. What are Hormones?
    A hormone is any member of a group of signaling molecules produced by glands in multicellular ...
  22. What is Endocrine system?
    The endocrine system is a chemical messenger system comprising feedback loops of hormones released by internal ...
  23. What is Human Nervous System?
    The nervous system is a very intricate part of an animal that manages its actions and ...
  24. What are Neurotransmitters?
    Neurotransmitters are endogenous chemicals messengers that enable neurotransmission. it is a type of chemical messenger which ...
  25. What are Neurohormones?
    A neurohormone is any hormone produced and released by neuroendocrine cells into the blood. these neaurohormones ...
  26. What is Pheromones?
    For example, when a foraging ant discovers a new food source, it marks its path back ...
  27. What is Nitric oxide?
    Nitric oxide (no) is fundamentally a gas and it functions in the body as both a ...
  28. What is Signal transduction?
    Signal transduction is the process by which a chemical or physical signal is conveyed through a ...
  29. What is Epinephrine?
    Adrenaline is also known as epinephrine. it is a hormone and a neurotransmitter. adrenaline is normally ...
  30. What is Pineal gland?
    The pineal gland is a small endocrine gland in the brain of most vertebrates. the pineal ...
  31. What is Hypothalamus?
    The hypothalamus is a portion of the brain has a variety of functions. one of the ...
  32. What is Thyroid gland?
    The thyroid gland is an endocrine gland located in neck, consists of two lobes. it is ...
  33. What are Adrenal glands?
    The adrenal glands are an example of endocrine glands. they produce a variety of hormones including ...
  34. What is Pancreas?
    The pancreas is an important organ of the digestive system and also an endocrine gland. the ...
  35. What is Ovaries?
    The ovary is an impotant organ in the female reproductive system that produces an ovum. when ...
  36. What is Testes?
    Testicles are the male reproductive gland or gonad in all animals, including humans. they are the ...
  37. What is Growth hormone?
    Growth hormone is also known as human growth hormone. it is a peptide hormone that incites ...
  38. What is Zygote?
    A zygote is a cell, eukaryotic, that is formed by a fertilization event between two gametes. ...
  39. What is Egg?
    The egg is a structure that contains the zygote in which an embryo develops until it ...
  40. What is sperm?
    Sperm is the reproductive cell of a male. a sperm cell that has a flagella and ...
  41. What is Ovulation?
    Ovulation is the discharge of eggs from the ovaries. this even happens when ovarian follicles break ...
  42. What is Hermaphroditism?
    A hermaphrodite is an any living organism that has incomplete reproductive organs or may have reproductive ...
  43. What is Scrotum?
    The scrotum is a reproductive structure in males that consists of a hanging sack of skin ...
  44. What is Ejaculation?
    Ejaculation is the release of semen from the male reproductory tract. the semen contains sperm and ...
  45. What is Uterus?
    The uterus is a main female hormone-responsive secondary sex organ of the reproductive system and is ...
  46. What is Endometrium?
    The endometrium is the internal epithelial layer of the uterus of a mammal.the layer thickens and ...
  47. What is Spermatogenesis?
    Spermatogenesis is the route through which haploid spermatozoa develop from their ancestoral germ cells. this occurs ...
  48. What is Oogenesis?
    Oogenesis is the variation of the ovum into a cell proficient to further develop when its ...
  49. What are Mammary glands?
    A mammary gland is an exocrine gland in mammals that produces milk. this milk is to ...
  50. What is Menstruation?
    Menstruationis the regular discharge of blood and mucosal tissue from the inner lining of the uterus ...
  51. What is Endometriosis?
    Endometriosis is a condition in which cells comparable to those in the the layer of tissue ...
  52. What is Estrous cycle?
    The estrous cycle is the periodic physiological changes that happen due to fluctuations in reproductive hormones ...
  53. What is Menopause?
    Menopause is the time in a females life when menstrual periods cease permanently, andthe women are ...
  54. What is Organogenesis?
    Organogenesis is the stage of embryonic development that starts at the end of gastrulation and lasts ...
  55. What is Fetus?
    A fetus is the unborn progeny of an animal that grows from an embryo. in humans, ...
  56. What is Abortion?
    Abortion is the termination of a pregnancy by removal or eviction of an embryo before it ...
  57. What is Contraception?
    Birth control is also known as contraception. it is a method that is used to prevent ...
  58. What are Model organisms?
    A model organism is any species that is not human and is comprehensively studied to understand ...
  59. What is Acrosome?
    The acrosome is an organelle that develops over the frontal part of the sperm of many ...
  60. What is Notochord?
    The notochord is an elastic or flexible rod made out of a material that has a ...