Navigation » List of Schools » East Los Angeles College » Physiology » Physiology 001 – Introduction to Human Physiology » Winter 2021 » Lecture Exam 1 (A)
Below are the questions for the exam with the choices of answers:
Question #1
A TRUE
B FALSE
Question #2
A FALSE
B TRUE
Question #3
A Increasing the expression of cAMP
B Acting as an agonist on the receptor for epinephrine, a hormone that increases heart contractility
C Decreasing the activity of cAMP-dependent protein kinase
D Inhibiting phosphodiesterase activity
E Increasing the availability of phosphodiesterase molecules
Question #4
A Upregulation of insulin receptors
B Saturation of the insulin receptor
C Increased affinity of insulin for its receptor
D Downregulation of insulin receptors
E Decreased expression of the second messenger in the insulin pathway
Question #5
A cAMP
B Tyrosine residues
C Enzymes
D G-protein coupled receptor
Question #6
A TRUE
B FALSE
Question #7
A is an agonist to the enkephalin receptor.
B decreases enkephalin in the brain
C increases enkephalin’s affinity for its receptor.
D increases enkephalin in the brain.
Question #8
A FALSE
B TRUE
Question #9
A TRUE
B FALSE
Question #10
A Cyclic AMP-dependent protein kinase activates two kinds of enzymes.
B Cyclic AMP directly activates enzymes that catabolize glycogen and fat.
C The activated receptor complex stimulates production of two different second messengers.
D Epinephrine is binding to two types of receptors in the plasma membrane.
Question #11
A allows small amounts of hormones to produce large responses in target cells.
B allows a cell to respond to more different hormones.
C results in the production of more of the first messenger.
D takes small molecules and makes polymers out of them.
Question #12
A Diacylglycerol
B Epinephrine
C Adenylyl cyclase
D ATP
E Phospholipase C
Question #13
A FALSE
B TRUE
Question #14
A Epithelial cells lining the small intestine have Na +-K +-ATPase pumps only in their basolateral membranes.
B Epithelial cell membranes express different transport proteins on different cell surfaces.
C The plasma membrane of epithelial cells that face the inside of a hollow or fluid-filled chamber in the body is called the basolateral membrane.
D When substances cross epithelial barriers by going through the cell membranes and cytosol, it is called the transcellular pathway.
E The pathway taken by substances that flow between epithelial cells is called the paracellular pathway.
Question #15
A FALSE
B TRUE
Question #16
A TRUE
B FALSE
Question #17
A false, because nonpolar molecules diffuse through more rapidly because much of the bilayer is nonpolar.
B false, because polar molecules diffuse through less rapidly because the bilayer is nonpolar throughout its width.
C false, because the rate of diffusion of nonpolar and polar molecules through the bilayer is essentially the same as long as the molecules are the same size.
D false, because polar molecules diffuse through less rapidly because the bilayer is polar throughout its width.
E true.
Question #18
A Ion concentration gradients would reach equilibrium across the cell membrane.
B Facilitated diffusion of molecules would cease.
C Secondary active transport of molecules would cease
D Primary active transport of molecules would cease.
E All transport processes would cease immediately when the ATP was depleted.
Question #19
A endocytosis.
B apoptosis.
C facilitated diffusion.
D osmosis.
E diffusion.
Question #20
A FALSE
B TRUE
Question #21
A At equilibrium, the netflux of X across the cell membrane is zero.
B At equilibrium, movement of X across the membrane will be much faster in one direction than in the other.
C At equilibrium, X will cease movingacross the cell membrane.
D Solute X will reach equilibrium, but the concentration will be much higher on the inside of the cell because of the smaller volume.
E Solute X will be unable to reach equilibrium because it is nonpolar.
Question #22
A Its penetrating solute concentration is greater than that of a normalcell
B Its nonpenetrating solute concentration is less than that of a normalcell
C Its penetrating solute concentration is less than that of a normalcell.
D Its nonpenetrating solute concentration is equal to that of a normalcell.
E Its nonpenetrating solute concentration is greater than that of a normalcell.
Question #23
A The reaction is catabolic and the energy content of the products are equal to that of the reactant.
B The reaction is anabolic and the energy content of the products is greater than that of the reactant.
C The reaction is anabolic and the energy content of the reactant is greater than that of the products.
D The reaction is catabolic and the energy content of the products is greater than that of the reactant.
E The reaction is catabolic and the energy content of the reactant is greater than that of the products.
Question #24
A FALSE
B TRUE
Question #25
A The forward direction (toward more carbonic acid accumulation)
B The reverse direction (toward more water and carbon dioxide accumulation)
C The net rate will be unaffected by an increase in carbonic acid concentration.
Question #26
A Over time, the substrate molecules are denaturing.
B The enzyme molecules are being used up and broken down by the reaction.
C The temperature of the room needs to increase to increase the rate of reaction.
D The substrate solution has become contaminated with an allosteric inhibitor.
E The enzyme has become saturated.
Question #27
A FALSE
B TRUE
Question #28
A FALSE
B TRUE
Question #29
A ribosomes
B mitochondria
C peroxisomes
D endosomes
E lysosomes
Question #30
A Krebs cycle
B Glycolysis
C The breakdown of fatty acids to CO 2 and H 2O
D None of the choices are correct.
E Oxidative phosphorylation
Question #31
A TRUE
B FALSE
Question #32
A Synthesis of lipids and intracellular storage of calcium ions
B Digestion of engulfed bacteria and cellular debris
C Transcription of DNA into RNA
D Generation of ATP
E Synthesis and packaging of proteins for secretion from the cell or export to other organelles
Question #33
A TRUE
B FALSE
Question #34
A TRUE
B FALSE
Question #35
A Electrolytes
B Gasses
C Isotopes
D Free radicals
E Vitamins
Question #36
A TRUE
B FALSE
Question #37
A Oxygen and hydrogen, connected by hydrogen bonds
B Carbon and oxygen, connected by polar covalent bonds.
C Carbon and hydrogen, connected by ionic bonds
D Carbon and hydrogen, connected by non-polar covalent bonds
E Carbon and hydrogen, connected by hydrogen bonds
Question #38
A FALSE
B TRUE
Question #39
A FALSE
B TRUE
Question #40
A Vitamins
B Sugars that were broken down for energy
C Ionic forms of mineral elements
D Lipids that form the membranes of cells
E Oxygen and gases used by metabolism
Question #41
A They can form different numbers of chemical bonds.
B They have different numbers of electrons.
C They have different numbers of neutrons.
D They have different number of energy shells
E They have different numbers of protons.
Question #42
A TRUE
B FALSE
Question #43
A FALSE
B TRUE
Question #44
A They are polymers of subunits containing a phosphate group, a sugar, and a purine or pyrimidine base.
B They are polymers of subunits containing glucose, a phosphate group, and an amino acid.
C They are polymers of subunits containing glucose andamino acids.
D They are long polymers of amino acids, folded into an alpha helix.
E They are polymers of subunits containing a phosphate group, a sugar, and an amino acid.
Question #45
A TRUE
B FALSE
Question #46
A Leave the amount of sodium unchanged
B Inhibit the ingestion of more sodium
C Increase the amount of sodium in the blood
D Decrease the amount of sodium in the blood
E Change the set point for sodium
Question #47
A Ventricles of the heart
B Endocrine gland in the gonads
C Suprachiasmatic nucleus of the brain
D Photoreceptors of the eye
E The adrenal glands
Question #48
A TRUE
B FALSE
Question #49
A TRUE
B FALSE
Question #50
A Effector, efferent pathway, integrating center, afferent pathway, receptor
B Integrating center, receptor, afferent pathway, efferent pathway, effector
C Receptor, afferent pathway, integrating center, efferent pathway, effector
D Receptor, efferent pathway, integrating center, afferent pathway, effector
E Effector, afferent pathway, integrating center, efferent pathway, receptor
Question #51
A FALSE
B TRUE
Question #52
A the structure of the body.
B two of the choices are correct.
C how organisms function.
D the spread of diseases.
E how two organisms interact.