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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. Hormone secreted by the hypothalamus that can suppress secretion of hormones by the anterior pituitary






2. Self - digestion occurring in plant and animal tissues - particularly after they have ceased to function properly






3. On a hydra - they secrete mucus onto the body surface - particularly around the mouth and basal disc






4. The minimum amount of energy required to start a chemical reaction reduced by enzymes.






5. The process that synthesizes a complex molecule from simpler compounds - thus requiring energy.






6. Genes located on the same chromosome that tend to be inherited together in genetic crosses






7. Neuroepithelial edges of the neural groove - the apical edges of which meet in the midline to close the neural tube






8. Pressure that has already developed in a solution due to osmosis.






9. Immunoglobulin. Less than 3%. Found only as a receptor on B cell membrane - Doesn't allow antigens to get into the body - Not secreted - stays attached to B cell






10. Tough fibers of the extracellular matrix. They are made of collagen that are nonelastic and do not tear easily when pulled lengthwise.






11. Compounds that reduce the concentration of hydrogen ions in a solution






12. A type of embryonic development in deuterostomes - in which each cell produced by early cleavage divisions retains the capacity to develop into a complete embryo.






13. An extensible membrane enclosing the contractile substance of a muscle fiber






14. Lines the surface of the lung and follows the contours of the lung itself






15. Tissue consisting of long muscle cells that are capable of contracting when stimulated by nerve impulses. Three types skeletal - cardiac - and smooth.






16. Measurement of amount of blood ejected from a ventricle in one contraction






17. Weak chemical bond formed by the attraction of positively charged hydrogen atoms to other negatively charged atoms.






18. Small - elongated mass of specialized cardiac muscle tissue just beneath the epicardium in the right atrium near the opening of the superior vena cava - starts impulses






19. The cavity in the vertebrate body enclosed by the ribs between the diaphragm and the neck and containing the lungs and heart






20. Substance produced by the body that inactivates or destroys another substance that is introduced into the body; antibody






21. A skeleton on the inside of a creature's body - typically composed of bone or cartilage






22. The part of an organism that connects the head to the rest of the body






23. The digestive secretion of the pancreas containing sodium bicarbonate - amylase - proteases - and lipases






24. 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).






25. The loss of electrons from a substance involved in a redox reaction.






26. A type of intercellular junction in animal cells that allows the passage of material or current between cells






27. Immunity provided by the body producing its own antibodies against a particular antigen; results from exposure to the antigen via infection or vaccine






28. An iron - containing protein that is a component of electron transport chains in the mitochondria and chloroplasts of eukaryotic cells and the plasma membranes of prokaryotic cells. Examples are hgb and the ones involved in the ETC in the inner membr






29. Km - is the ratio of the breakdown of an enzyme - substrate complex to its formation in simple Michaelis - Menton reactions. Km is also half Vmax - and a low Km indicates a strong affinity between an enzyme and its substrate.






30. Strawlike tube between an ovary and the uterus through which an ovum passes after ovulation






31. Head of the sperm that releases hydrolytic enzymes allowing it to enter the egg






32. 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






33. 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






34. Person with type AB blood who can recieve any blood because it has no antibodies






35. Structure in the male reproductive system in which sperm are fully matured and are stored






36. A mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal viscera






37. Simplest starch which is a long unbranching chain of glucose molecules has the same alpha linkages as glycogen






38. Strong connective tissue that supports the body and is softer and more flexible than bone






39. A substance that resembles gelatin and is obtained by boiling cartilage in water






40. A small cellular inclusion consisting of a ring of DNA that is not in a chromosome but is capable of autonomous replication






41. The outermost of the three primary germ layers in animal embryos; gives rise to the outer covering and - in some phyla - the nervous system - inner ear - and lens of the eye






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






43. Enzyme in the intestinal juice that converts inactive trypsinogen into active trypsin






44. Condition that occurs when the pancreas produces too little insulin - resulting in an increase in the level of blood glucose






45. Neurological tissue in the center of the heart that receives and amplifies the conduction of impulses from the SA node to the bundle of His






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






47. Sequence of nucleotides on a gene that gets transcribed and translated






48. Also known as adenylyl cyclase - adenyl cyclase or AC) is a lyase enzyme. It is a part of the cAMP- dependent pathway catalyzes the conversion of ATP to 3' -5'- cyclic AMP (cAMP) and pyrophosphate






49. Connects the embryo to the placenta; moves food and oxygen from the placenta to the embryo and removes the embryo's waste products






50. The portion of the skeleton that attaches to the axial skeleton and has the limbs attached to it