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MCAT Biology 2

Subjects : mcat, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Is a swelling of the axial terminal - The presynaptic swelling of the axon terminal From which neural messages travel across synaptic cleft to other neurons






2. In this time during cleavage the morula (solid ball of embryonic cells) becomes the blastula (blastocyst in mammals). Implants in the uterine wall during this time.






3. It is the lowermost layer of the integumentary system in vertebrates. Types of cells that are found in the hypodermis are Fibroblasts - Adipose Cells - and Macrophages






4. A muscle that is connected at either or both ends to a bone and so move parts of the skeleton






5. Diploid cells resulting from the activation of an oogoium; primary oocytes are ready to enter meiosis I. remember: cyte means ready to undergo meiosi






6. Points in which two cells are fastened together into strong sheets. Intermediate filaments anchor these. Also called anchoring junctions.






7. Small cavities in the bone or cartilage that hold individual bones or cartilage cells.






8. Receives blood from lower limbs and abdominal organs and empties into the posterior part of the right atrium of the heart






9. A chemical process in which a compound is broken down and changed into other compounds by taking up the elements of water. Breaks apart most macromolecules of living cells.






10. Found in the cytosol and contains - microfilaments - microtubules - and intermediate fibers. Gives the cell its shape and and anchor organelles. Functions in intracellular transport.






11. Process by which a liquid or gas passes through a filter to remove wastes






12. Process in which homologous chromosomes exchange portions of their chromatids during meiosis






13. The maximal volume of air that the lungs can contain. Total lung capacity is the sum of the vital capacity and the residual volume - and is typically about 6000 mL (6L).






14. A four - carbon molecule that binds with the two - carbon acetyl unit of acetyl - CoA to form citric acid in the first step of the Krebs cycle.






15. Rapid antibody production that occurs following re - exposure to the antigen. IgG is the predominant antibody produced during this.






16. The membrane that forms around a fertilized ovum and prevents penetration by additional spermatozoon






17. An electron - proton - or neutron; one of the three major particles of whoch atoms are composed






18. The part of the small intestine between the jejunum and the cecum - End portion of the small intestine






19. A type of embryonic development in protostomes that rigidly casts the developmental fate of each embryonic cell very early






20. The period of the cell cycle during which the nucleus is not undergoing division - typically occurring between mitotic or meiotic divisions






21. Secrete mucous which forms a protective barrier to prevent digestion of the stomach; absorption of small amounts of water - ions - fatty acids & some drugs & alcohol enters the blood stream






22. The part of the small intestine between the stomach and the jejunum






23. The process by which wastes are removed from the body






24. A lymphocyte - like cell that develops from a B lymphocyte in reaction to a specific antigen - Lymphoid cell that secretes an antibody and originates from B lymphocytes






25. One of the main pancreatic proteases; it is activated (from chymotrypsinogen) by trypsin.






26. Any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active






27. A nerve or muscle fibre responds completly or not at all to a stimulus






28. This poison that can carru protons across inner membrane; uncouples the electron transport chain from the proton gradient established across the inner mitochondrial membrane.






29. The substance acted upon by an enzyme or ferment






30. Mesodermal tissue that forms connective tissue and blood and smooth muscles






31. Gland that releases its secretions through tubelike structures called ducts






32. In immune network theory - an idiotope - an antigenic site of an antibody that is responsible for that antibody binding to an antigenic determinant (epitope).






33. Joint - lubricating fluid secreted by the synovial membrane






34. Molecule binds to an enzyme somewhere other than active site and inhibits. - change the shape of the active site - and may enhance enzyme function






35. A helical protein that winds around actin helices in skeletal and cardiac muscle cells to form the thin filament of the sarcomere. In the absence of Ca2+ - tropomyosin covers the myosin - binding sites on actin and prevents muscle contraction. When c






36. Assist the enzyme by building the enzyme on a site other than the active site to boost the activivty.






37. Colorless watery fluid of blood and lymph containing no cells and in which erythrocytes and leukocytes and platelets are suspended






38. An energy storage molecule used by muscle tissue. The phosphate from creatine phosphate can be removed and attached to an ADP to generate ATP quickly.






39. A semiliquid mass of partially digested food that passes from the stomach through the pyloric sphincter into the duodenum






40. Alpha helix and beta pleated sheet formed through formation of hydrogen bonds. - The second level of protein structure; the regular local patterns of coils or folds of a polypeptide chain.






41. Inner tissue layer of the kidney. Contains loops of Henle and collecting tubules. Contains pyramids.






42. A small cell containing little cytoplasm that is produced along with the oocyte and later discarded






43. Reproduction that consists of only females that produce more females from unfertilized eggs






44. Protein filaments inside a myofibril are organized into repeating functional units - (10 -000/myofibrils) smallest function unit of muscle fibers 1- thick filaments - myosin 2- thin fillament - actin 3- proteins that stablize 4- proteins that will re






45. An organism that uses energy to control its internal environment






46. An enzyme present in erythrocytes (as well as in other places) that catalyzes the conversion of CO2 and H2O into carbonic acid (H2CO3).






47. An internal membrane system in which components of cell membrane and some proteins are constructed. Involved of the transport of materials throughout the cell.






48. The production - growth - and maturation of an egg - or ovum






49. Relatively massive bundles of subunits composed of the protein myosin that can reach 15nm in diameter






50. Membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi