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Lecture Exam 3 (A)

Navigation   » List of Schools  »  East Los Angeles College  »  Physiology  »  Physiology 001 – Introduction to Human Physiology  »  Winter 2021  »  Lecture Exam 3 (A)

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Below are the questions for the exam with the choices of answers:

Question #2
A  The slope of diastolic depolarization in SA node cell action potentialsdetermines the heart rate.
B  Stimulation of sympathetic nerves to the heart causes an increase in heart rate.
C  A person whose heart lacks autonomic innervation has a faster heart rate at rest than a person with a normally innervated heart.
D  Stimulation of parasympathetic nerves to the heart causes a slowing of heart rate.
E  The slope of diastolic depolarization in SA node cell action potentialsdetermines the heart rate. Stimulation of sympathetic nerves to the heart causes an increase in heart rate. A person whose heart lacks autonomic innervation has a faster heart rate at rest than a person with a normally innervated heart. Stimulation of parasympathetic nerves to the heart causes a slowing of heart rate.
Question #3
A  peristalsis.
B  receptive relaxation.
C  mass movement.
D  segmentation.
E  migrating motility complex.
Question #4
A  Helicobacter pylori.
B  Streptococcus pyogenes.
C  Clostridium difficile.
D  Staphylococcus aureus.
E  Eschericia coli.
Question #5
A  During digestion of a high-carbohydrate meal, such as a bagel.
B  Elizabeth is likely to be in the same amount of pain all the time.
C  During the digestion of a high-protein meal, such as a steak.
D  During periods of hunger.
E  During the digestion of a high-fat meal, such as greasy French fries.
Question #11
A  There are no afferent neuronal pathways from the GI tract to the central nervous system.
B  If the autonomic nerves to the GI tract were cut, digestion and absorption of food could no longer take place.
C  Networks of neurons in the wall of the GI tract innervate the wall’s smooth muscle.
D  The nerve plexus of the GI tract exists in a single layer, just outside of the serosa.
E  Smooth muscle of the GI tract is innervated by both sympathetic and somatic motor nerves.
Question #12
A  A snack rich in protein, such as a dried meat stick
B  A snack rich in lipids, such as slices of cheese
C  All of these will have equal impacts on blood glucose level
D  A snack rich in digestible polysaccharides such as a cooked potato
E  A snack rich in cellulose, such as a bag of celery
Question #13
A  Strenuous exercise
B  Severe vomiting
C  Severe diarrhea
D  Hypoventilation
E  Hyperventilation
Question #14
A  HCl and gastrin
B  HCl and intrinsic factor
C  HCl and pepsinogen
D  pepsinogen and intrinsic factor
E  gastrin and intrinsic factor
Question #17
A  Free amino acids are the only product of protein digestion that can beabsorbed from the lumen into intestinal epithelial cells.
B  After absorption, the products of protein digestion are carried by blood directly to the liver.
C  Only the exocrine pancreas produces enzymes that can digest proteins.
D  The enzymes that digest protein are secreted in active form.
E  Pepsin digests protein mainly in the small intestine.
Question #18
A  A fetus with type B blood may be at risk if its mother has type O blood.
B  The risk to anRh-positive fetus of an Rh-negative mother is lessened if she haspreviously carried anRh-negative fetus.
C  An Rh-negative fetus may be at risk if its mother is Rh-positive.
D  The greatest risk to a fetus occurs when both mother and fetus are Rh-positive.
E  An Rh-positive fetus may be at risk if its mother is Rh-negative.
Question #19
A  Delayed hypersensitivity
B  Immune-complex hypersensitivity
C  Cytotoxic hypersensitivity
D  Immediate hypersensitivity
Question #20
A  None of these are true.
B  The patient will have increased immunity to bacterial infections.
C  Many cells of the body will increase their cellular production of antiviral proteins.
D  The patient will have increased immunity to viral infections.
E  The patient may have increased immunity to the progression of cancer tumors.
Question #21
A  Certain unusual cancers such as Kaposi’s sarcoma co-occur with relatively high frequency.
B  The HIVvirus preferentially enters and disables B cells.
C  It is caused by a retrovirus.
D  It is transmitted by intimate contact with infected blood, sexual intercourse with an infected partner, or by an infected mother to her breast-fed infant.
E  It is caused by a virus that contains RNA.
Question #22
A  Neutrophils
B  B cells
C  Cytotoxic T cells (CD8 cells)
D  NK cells
E  Helper T cells (CD4 cells)
Question #23
A  B cells and helper T cells
B  Cytotoxic T cells and helper T cells
C  Marcrophages and natural killer cells
D  B cells and plasma cells
E  Natural killer cells and B cells
Question #25
A  There is reduced breakdown of triglycerides in adiopse tissue and a decrease in plasma free fatty acids compared to normal.
B  The body’s set point temperature is reset so that body temperature is maintained lower than normal.
C  Secretion of cortisol by the adrenal cortex is decreased.
D  The liver retains iron and zinc so plasma levels are decreased from normal.
E  Appetite generally increases compared to normal.
Question #26
A  refers to dilation of blood vessels by chemicals released by damaged tissue cells.
B  refers to the engulfing of microbes and foreign molecules by macrophages.
C  refers to the chemical attraction of neutrophils to a site of inflammation.
D  is important only for innate immune responses.
E  is important only for adaptive immune responses.
Question #29
A  A decrease in alveolar P O2
B  The same alveolar P CO2 as under normal conditions
C  An increase in alveolar P CO2
D  Increased alveolar P O2
E  Decreased alveolar P CO2
Question #30
A  The alveolar O 2 level has increased toward atmospheric levels.
B  The level of O 2 in her blood has increased.
C  The alveolar CO 2 has decreased to near atmospheric levels.
D  The level of H + ions in her blood has increased.
E  The pH of her blood has increased.
Question #31
A  A β2-adrenergic antagonist
B  A muscarinic agonist
C  Histamine
D  Pulmonary surfactant
E  A β2-adrenergic agonist
Question #32
A  Receptors in the aortic and carotid bodies
B  Receptors that mediate the Hering-Breuer reflex
C  Hair cells in the cochlea
D  Baroreceptors in the aortic and carotid arch
Question #34
A  Decreased arterial PC O2
B  Increased arterial P CO2
C  Decreased arterial P O2
D  Increased respiratory rate
E  Increased arterial P O2
Question #35
A  TRUE
B  FALSE
Question #36
A  It increases airway resistance.
B  It can only interact with other lipid molecules
C  It increases the compliance of the lungs.
D  It is secreted by type I alveolar cells.
E  It is secreted into the intrapleural space.
Question #39
A  Pneumothorax
B  Exhalation/expiration
C  Emphysema
D  A collapsed lung
E  Inhalation/inspiration
Question #40
A  the duration of systole is greater than that of diastole.
B  the contraction of the atria overlaps in time with the ventricular systole.
C  the volume of blood leaving the left side of the heart is greater than that leaving the right side.
D  the pressure of blood leaving the right ventricle is greater than that leaving the left ventricle.
E  the duration of diastole is greater than that of systole.
Question #42
A  The rate of flow in a tube will decrease if the resistance to flow is decreased.
B  The greater the resistance to flow in a tube, the greater the rate of flow for any given pressure difference.
C  The rate of fluid flow in a tube will increase if the pressure at the beginning is increased while the pressure at the end of the tube stays the same.
D  The flow of fluid in a tube depends upon the absolute pressure at the beginning of the tube.
E  If both the resistance and the pressure gradient in a tube increase, the flow must also increase.
Question #43
A  Decreased blood flow to tissues that results in vasodilation
B  Decreased blood flow to tissues that results in vasoconstriction
C  Increased metabolic activity that results in vasodilation
D  Increased metabolic activity that results in vasoconstriction
E  Increased blood pressure that drives blood more rapidly through tissues
Question #46
A  The atria and ventricles would no longer beat in synchrony.
B  The SA node would no longer set the pace for ventricular contraction.
C  The ventricles would contract more frequently than the atria.
D  The Purkinje fibers would not receive their typical action potential frequency from the bundle branches.
E  There would be a slowing of the frequency of contraction of the ventricles.
Question #47
A  sympathetic; reactive hyperemia; dilation; intrinsic; extrinsic
B  parasympathetic; active hyperemia; constriction; extrinsic; intrinsic
C  parasympathetic; reactive hyperemia; dilation; extrinsic; intrinsic
D  sympathetic; active hyperemia; dilation; extrinsic; intrinsic
E  sympathetic; flow autoregulation; constriction; intrinsic; extrinsic
Question #48
A  The set point for normal arterial blood pressure
B  A disease in which blood clot formation is impaired
C  The prevention or stoppage of blood loss
D  A protein inside red blood cells that binds oxygen with high affinity
E  The maintenance of relatively stable conditions in the internal environment
Question #51
A  A blood clot is a network of interlacing strands of fibrinogen.
B  Blood clotting occurs too rapidly in individuals with the disease hemophilia.
C  Blood clotting is enhanced by prostaglandin I2 (PGI2) and nitric oxide.
D  Blood clotting requires activation of thrombin.
E  Injecting tissue plasminogen activator (t-PA) into a patient who is bleeding will aid blood clotting.