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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. Where myosin heads can attach. 2 proteins usualy cover the locations of attachments for the myosin heads: troponin and tropomyosin.
canliculi
myosin binding sites
secretion
adductor
2. Blood vessels that carry blood back to the heart
adrenal glands
veins
apoptosis
cartilage
3. This poison that can carru protons across inner membrane; uncouples the electron transport chain from the proton gradient established across the inner mitochondrial membrane.
Solvation
hypophysis
smooth ER
dinitrophenol
4. Form gametes which combine to form zygotes that develope into more sporozoites
fetal gas exchange
corticosteroids
ubiquinone
gametocytes
5. Used to create ATP. H+ in the thylakoid space can only diffuse down it gradient through an enzyme called ATPsynthase. ATPsynthase consists of two parts. One is a proton channel that allows the H+ to diffuse into the stroma. The other part couples thi
electron transfer
hypercapnia
proton gradient
trophoblast
6. Abnormally low blood sugar usually resulting from excessive insulin or a poor diet
hypoglycemia
lactic acid
dinitrophenol
peristalsis
7. An enzyme complex in the inner membrane of a mitochondrion and the thylakoid membrane of a chloroplast that catalyzes the formation of ATP.
myogenic activity
coronary arteries
ATP synthetase
seminal fluid
8. 1) is the 2nd and deepest layer of the dermis. 2) Compose of Dense Irregular CT. 3) Contains interlacing Collagen and Elastic Fibers. 4) Is packed with oil glands - sweat gland ducts - fat - and hair follicles. 5) It provides strength - extensibility
reticular layer
erythrocytes
cytokinesis
reabsorption
9. Body cell; no egg or sperm
neutrophils
basement membrane
autosomal cell
homologous chromosomes
10. Tissue consisting of long muscle cells that are capable of contracting when stimulated by nerve impulses. Three types skeletal - cardiac - and smooth.
parathyroid glands
synapsis
Muscle Tissue
cortisone
11. Activated in the duodenum by enterokinase - which is produced in the cells lining the duodenum
Hydrophobic
tidal volume
secretin
trypsinogen
12. Minerals that carry electrical charges that help maintain the body's fluid balance
cilia
electrolytes
countertransport
Fatty acids
13. Process by which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell
melanocyte
ctive site
basement membrane
meiosis
14. First and longest phase of mitosis - during which the chromosomes become visible and the centrioles separate and take up positions on the opposite sides of the nucleus
veins
thromboplastin
fertilization membrane
prophase
15. Two components: organinc which is collagen fibers and inorganic which is hydroxyapatite crystals
bone matrix
movable joints
neural crest
Carbohydrate
16. (Vh and Vl) variable N- terminal portions of the L and H chains that cause the differences between antibodies and combine to make up the antigen - binding region of the antibody.
variable regions
spindle fibers
proteome
follicular phase
17. 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
haversian canal
glucocorticoids
exocrine glands
motor neuron
18. Reproduction that consists of only females that produce more females from unfertilized eggs
parthogenesis
TRH
hypodermis
nucleotides
19. The thin endometrium layer of the uterus that does not shed and is responsible for forming a new functional layer after menstruation ends
stratum basalis
acid
fetal gas exchange
extracellular digestion
20. The contraction of the chambers of the heart (especially the ventricles) to drive blood into the aorta and pulmonary artery
emulsification
systole
carboxyhemoglobin
fibroblasts
21. Small nuclear ribonucleoproteins; recognize the splice sites in the pre - mRNA; located in the nucleus and are composed of proteins and RNA
hypodermis
snRNP
autosomal cell
autonomic nervous system
22. Stimulates and sustains a woman's milk production following the birth of an infant
stratum basalis
duodenum
prolactin
cotransport
23. Enzyme in the intestinal juice that converts inactive trypsinogen into active trypsin
enterokinase
norepinephrine
synovial fluid
substrate level phosphorylation
24. Duct formed by the union of the vas deferens with the duct of the seminal vesicle; its fluid is carried into the urethra
ejaculatory duct
cAMP
coronary sinus
memory cell
25. Aid in expiration by contracting to pull the ribs downward and decrease the volume of the thoracic cavity (internal intercostal muscles originate in the inferior rib and insert on the superior rib)
metabolism
collagenous fibers
internal intercostal muscles
loop of henle
26. A solution in which the concentration of solutes is greater than that of the cell that resides in the solution
thromboplastin
hypertonic solution
IgM
gametocytes
27. Presence of an abnormal amount of ketone bodies in the blood and urine indicating an abnormal utilization of carbohydrates as seen in uncontrolled diabetes and starvation
Hydrophobic
atrial natriuretic hormone
ketoacidosis
axial skeleton
28. Consists of layer of compact bone encloses in spongy bone at the ends of the long bones
diastole
angiotensin
epiphyses
Hydrophobic
29. Stage of the cell cycle when a cell is actively dividing - the part of the cell cycle when mitosis divides the nucleus and distributes its chromosomes to the daughter nuclei and cytokinesis divides the cytoplasm - producing two daughter cells.
Mitotic phase
oxytocin
peristalsis
cascade effect
30. Thin - walled microscopic air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place
quarternary structure
alveoli
diploid
thyroid gland
31. A fluid - filled sphere formed about 5 days after fertilization of an ovum that is made up of an outer ring of cells and inner cell mass. THis is the structure that implants in the endometrium of the uterus.
striated muscle
thermoregulation
blastocyst
hypophyseal portal system
32. Joint that allows range of movement
chorionic villi
movable joints
alpha helix
Dehydration synthesis
33. Require B and T cells. B cells undergo clonal selection with production of plasma cells and memory B cells after their B- cell receptor combines with a specific antegen. Plasma cells secrete antibodies and eventually undergo apoptosis. Memory B cells
nonspecific defense mechanism
ileum
blastula
medulla oblongata
34. The coupling of the 'downhill' diffusion of one substance to the 'uphill' transport of another against its own concentration gradient
lactase
telophase I
cotransport
enzyme specificity
35. Organelles that serve as specialized containers for metabolic reactions.
neurotransmitters
portal systems
microbodies
tonus
36. Area of prokaryotic cells where the DNA is concentrated.
creatine phosphate
light chains
Nucleoid region
proton gradient
37. Corticotropin releasing factor; secreted by hypothalamus and stimulates the pituitary gland and activated adrenal gland and then get the release of corisol as part of the 'stress response'
CRF
homeotherm
endoderm
androgens
38. The production - growth - and maturation of an egg - or ovum
corticosteroids
intermembrane space
oogenesis
receptor mediated endocytosis
39. Glands located in the walls of the stomach - secreting the hormone gastrin in response to certain substances in food.
axial skeleton
Meiosis II
pyloric glands
lactic acid
40. A vein connecting the capillary bed of the intestines with the capillary bed of the liver. This allows amino acids and gluocse absorbed from the intestines to be delivered first to the liver for processing before being transported throughout the circ
dsRNA
fetal hemoglobin
hepatic portal vein
neural folds
41. Neuroepithelial edges of the neural groove - the apical edges of which meet in the midline to close the neural tube
neural folds
trophoblast
neutrophils
glomerulus
42. Measurement of amount of blood ejected from a ventricle in one contraction
amino acid derived hormones
blastula
stroke volume
compounds
43. The model of the enzyme that shows the substrate binding to the active site and the active site altering slightly is the
T lymphocyte
addison's disease
induced fit model
apoenzyme
44. The removal of an amino group from an organism - particularly from an amino acid
periosteum
Michaelis constant
deamination
functional groups
45. 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
gluconeogenesis
Haploid cell
prophase
prophase II
46. Excited electrons are passed from protein to protein in the thylakoid membrane
mitochondria
flagella
blastula
ETS
47. An amino acid in a polypeptide that is not the N or C terminal AA. This refers to every amino acid in a polypeptide chain.
endochondral ossification
immovable joints
glucocorticoids
amino acid residue
48. Tiny passageways interconnecting the lacunae/osteocytes with the blood vessels - nerves - etc. in the Haversain Canal of an Haversian System
canliculi
respiratory center
dissociation curve
lacteals
49. Any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes - thus producing an immune response
adductor
lock and key theory
facilitated diffusion
antibody
50. The transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
nephron
Facilitated diffusion
microfilaments
glycolysis