SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
Search
Test your basic knowledge |
MCAT Biology 2
Start Test
Study First
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. Lipid substances with linked sugar groups that are key structural elements in cell membranes and precursors of other biologically active molecules important in cell signaling.. Are also amphipathic and are found in myelinated cells composing the huma
glycolysis
collagenous fibers
Glycolipids
testicular feminization
2. The widening of the chambers of the heart between two contractions when the chambers fill with blood
diastole
variable regions
ureter
neutrophils
3. Human Chorionic Gonadotropin - a hormone secreted by the trophoblast cells of a blasocyst (i.e. developing embryo) that prolongs the life of the corpus luteum - and thus increases the duration and amount of secreted progesterone. This helps to mainta
Glucose
plasma
neural folds
Hcg
4. Cortisol and Cortisone are types of these hormones - produced in the Adrenal cortex - which increase blood glucose levels through stimulation of gluconeogenesis and the decrease of protein synthesis. They also reduce the body's immunological and infl
glucocorticoids
catecholamines
tidal volume
cristae
5. The minimum amount of energy required to start a chemical reaction reduced by enzymes.
alimentary canal
hemophilia
activation energy
ATPase
6. Layer of bone tissue having many small spaces and found just inside the layer of compact bone.
endoplasmic reticulum
electron transfer
spongy bone
calcitonin
7. One of the main pancreatic proteases; it is activated (from chymotrypsinogen) by trypsin.
ATP synthetase
IgA
chymotrypsin
epiphyseal plate
8. The endocrine system's most influential gland. Under the influence of the hypothalamus - the pituitary regulates growth and controls other endocrine glands
anaphase I
pituitary gland
asters
purkinje fibers
9. Blood cells containing hemoglobin that carry oxygen through the bloodstream
neuromuscular junction
T cells
ed blood cells
microtubule
10. Steroid hormones secreted from the adrenal cortex. The two major classes are teh mineralocorticoids and glucocorticoids. Aldosterone is the principal mineralocorticoid - and cortisol is the principal glucorcorticoid.
corticosteroids
genetic recombination
somatic cell
ADH
11. A chemical change in which a single compound breaks down into two or more simpler products
telophase II
decomposition reaction
cervix
Muscle Tissue
12. A spiral shape constituting one form of the secondary structure of proteins - arising from a specific hydrogen - bonding structure.
ADP
Vmax
ectoderm
alpha helix
13. Found in the cytosol and contains - microfilaments - microtubules - and intermediate fibers. Gives the cell its shape and and anchor organelles. Functions in intracellular transport.
vacuole
oxidation
cytotoxic T cells
cytoskeleton
14. The second of two major stages in photosynthesis (following the light reactions) - involving atmospheric CO2 fixation and reduction of the fixed carbon into carbohydrate.
prostate gland
acromegaly
Nucleic acids
calvin cycle
15. The cavity in the vertebrate body enclosed by the ribs between the diaphragm and the neck and containing the lungs and heart
cytoskeleton
forces creating tertiary structure
binary fission
thoracic cavity
16. Thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles - birds and mammals)
amnion
parietal pleura
z lines
seminiferous tubules
17. Made from cholesterol. Composed of 4 carbon rings attached to distinctive side chains that determine the unique properties of the hormones. Hydrophobic and fat soluble.
cytoskeleton
steroid hormones
medulla oblongata
alcohol fermentation
18. The organs that hormones act on to either increase or decrease the organ's activity level.
Proteoglycan
kinase
target organs
allosteric inhibitor
19. Hairlike structures with the capacity for movement - short structures projecting from a cell and containing bundles of microtubules that move a cell through its surroundings or move fluid over the cell's surface
cascade effect
acrosomal process
cilia
filtration
20. Process in which food is broken down outside the cells in a digestive tract
parietal cells
extracellular digestion
coronary sinus
compounds
21. Smooth muscle vesicle - like structure that serve a purpose like T- tubules
ATPase
caveolae
peroxisomes
umbilical vessels
22. Diploid cells resultinf rom the activation of a spermatogoium; primary spermatocytes are ready to enter meiosis I. remember: cyte means ready to undergo meiosis.
primary spermatocytes
determinate cleavage
spindle fibers
hypertonic solution
23. A complex assembly that interacts with the ends of an RNA intron in splicing RNA - releasing the intron and joining the two adjacent exons.
capsid
Conjugated protein
spliceosome
chyme
24. This poison that can carru protons across inner membrane; uncouples the electron transport chain from the proton gradient established across the inner mitochondrial membrane.
potential osmotic pressure
dinitrophenol
alimentary canal
platelets
25. Pertaining to substances that don't contain carbon; a substance that is produced from the breakdown of PC and is the leading cause of fatigue in working muscles
inorganic phosphate
Prostaglandins
polar body
anasarca
26. Generation of glucose from non - sugar carbon substrates like pyruvate - lactate - glycerol - and amino acids The vast majority takes place in the liver and - to a smaller extent - in the cortex of kidney. This process occurs during periods of fastin
uterus
FADH
gluconeogenesis
epiphyseal plate
27. This system's funtions are (1) to transport tissue fluid to the blood vessels - and (2) to protect the body by removing foreign material such as bacteria from the lymphatic stream and by serving as a cite for lymphocytes 'policing of body fluids and
Passive immunity
lymphatic system
catabolism
papillary layer
28. Any of the many tiny canals that contain blood vessels and connective tissue and that form a network in bone
haversian canal
bundle of his
carboxyhemoglobin
bowmans capsule
29. The body system that consists of the heart - blood vessels - and blood - and that carries needed substances to cells and carries waste products away from cells
cardiovascular system
epithelial tissue
hypodermis
basement membrane
30. All multicellular and unicellular nonbacteria organisms. Is bounded by a cell membrane and contains cytoplasm. cytoplasm contains organellessuspended in a semifluid mediumcalled cytosol. The genetic material consists of linear strands of DNA organize
negative pressure breathing
Eukaryotes
tertiary structure
ectoderm
31. Reproduction that consists of only females that produce more females from unfertilized eggs
spermatogonia
Solvation
parthogenesis
DNA polymerase
32. Finger - like projections that increase the surface area and increase absorption
autotrophic
mucous cells
villi
adenylate cyclase
33. Reproduction of some unicellular organisms (such as yeasts) by growth and specialization followed by the separation by constriction of a part of the parent
budding
B cell
thyroxine
PKU
34. The tendency of certain factors to stablize the hemoglobin in the tense conformation - thus reducing its affinity for oxygen and enhancing the relase of oxygen to the tissues. The factors include increased PCO2 - increase temperature - increased bisp
Fatty acids
tonus
lymphocytes
bohr effect
35. Replicated forms of a chromosome joined together by the centromere and eventually separated during mitosis or meiosis II.
chymotrypsin
sister chromatids
antigen binding site
parthogenesis
36. Excited electrons are passed from protein to protein in the thylakoid membrane
total lung capacity
Golgi apparatus
ETS
hemophilia
37. Points in which two cells are fastened together into strong sheets. Intermediate filaments anchor these. Also called anchoring junctions.
ligaments
PTH
asters
desmosomes
38. Polypeptide chains that contribute to the structure of an antibody. Two identical light chains and two identical heavy chains - joined by disulfide bridges - form a Y- shaped antibody molecule.
light chains
peptide hormones
lymphocytes
Solvation
39. Organisms that first forms a mouth when it develops.
reabsorption
protostomes
TSH
emulsification
40. Smooth muscle and cardiac muscle has the property of flexing without nervous stimulation called...
myogenic activity
reversible reaction
ureter
erythrocytes
41. (genetics) the organic process whereby the DNA sequence in a gene is copied into mRNA
yellow marrow
transcription
anaphase
metaphase
42. Antibody found in blood and secretions - made more than any other isotype - most abundunt in the tears - sweat - saliva and mucosa.
translation
atoms
atrioventricular node
IgA
43. Cells located in the seminiferous tubules to nourish spermatids
pancreas
nerve terminal
end product inhibition
sertoli cells
44. A nucleotide found in muscle cells and important in metabolism
hyperglycemia
oxidation
AMP
lactic acid fermentation
45. Nonenzymatic binding of glucose to other molecules such as proteins - fats - or nucleic acids.
allantois
atrial natriuretic hormone
veins
Glycosylation
46. A type of cell death in which the cell uses specialized cellular machinery to kill itself
stratum granulosum
semilunar valve
apoptosis
cyanobacteria
47. Water passively moves out - esp - in hypertonic medulla. Deeper more hypertonic=more H2O absorbed by kidney.
glucocorticoids
heart
trypsinogen
descending limb
48. System of tubules that provides channels for ion flow throughout the muscle fibers to facilitate the propagation of an action potential.
transverse tubules
homeotherm
CCK
osteoblasts
49. Condition that occurs when the pancreas produces too little insulin - resulting in an increase in the level of blood glucose
reabsorption
induction
diabetes mellitus
umbilical arteries
50. A flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates
notochord
prophase
coenzymes
effector cell