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Physiology Practice Test 2 Flashcards

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1
Q
  1. When receptors fire they allow sodium to leak into the cell. Which part of the wave form is described?
    a. Resting potential
    b. Depolarization
    c. Repolarization
    d. Absolute refractory period
A

b. Depolarization

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2
Q
  1. which of the following occurs at the end of the P wave and the beginning of the QRS wave?
    a. The SA node fires
    b. An AV node delay
    c. The impulse travels down the bundle of HIS
    d. Purkinje fibers fire
A

b. An AV node delay

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3
Q
  1. Which part of the breathing cycle occurs after taking a deep breath and before breathing out?
    a. Inspiratory reserve volume
    b. Tidal volume
    c. Inspiratory capacity
    d. Vital capacity
A

c. Inspiratory capacity

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4
Q
  1. The S1 sound of the heart is heard in which part of the cardiac cycle?
    a. AV valves closing
    b. AV valves opening
    c. Semilunar valves closing
    d. Semilunar valves opening
A

a. AV valves closing

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5
Q
  1. The functional residual capacity consists of the residual volume and the ______.
    a. vital capacity
    b. Tidal volume
    c. Inspiratory reserve volume
    d. Expiratory reserve volume
A

d. Expiratory reserve volume

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6
Q
  1. Acute respiratory distress syndrome is caused by which of the following?
    a. Too much surfactant
    b. Deficiency of surfactant
    c. Overstimulation of J cells
    d. Abnormality of chloride channels
A

b. Deficiency of surfactant

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7
Q
  1. which of the following must occur in the body of a diabetic patient in order to balance pH?
    a. Respiratory acidosis
    b. Respiratory alkalosis
    c. Metabolic acidosis
    d. Metabolic alkalosis
A

b. Respiratory alkalosis

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8
Q
  1. The thick ascending limb of the loop of Henle is most able to absorb which substance?
    a. Amino acids
    b. Water
    c. Potassium
    d. Sodium
A

d. Sodium

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9
Q
  1. In which part of the intestine is cyanocobalamin absorbed?
    a. Stomach
    b. Duodenum
    c. Jejunum
    d. Ileum
A

d. Ileum

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10
Q
  1. Following fertilization which of the following hormones is produced by the trophoblasts ?
    a. FSH
    b. LH
    c. HCG
    d. Estrogen
A

c. HCG

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11
Q
  1. In which part of the male anatomy is a vasectomy performed?
    a. Epididymis
    b. Vas deferens
    c. Interstitial cells of Leydig
    d. Sertoli cells
A

b. Vas deferens

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12
Q
  1. Glucose and amino acids are transported into the cells by ______.
    a. Diffusion
    b. ATP
    c. Facilitated diffusion
    d. Co-transport
A

d. Co-transport

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13
Q
  1. Extrafusal fibers receive direct input form which of the following neurons?
    a. gamma motor neurons
    b. Alpha motor neurons
    c. Intermediolateral cells
    d. Clarke’s column
A

b. Alpha motor neurons

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14
Q
  1. Which hormone is responsible for degeneration of the corpus leuteum?
    a. FSH
    b. LH
    c. Estrogen
    d. Progesterone
A

b. LH

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15
Q
  1. Which ion binds with troponin in skeletal muscle to cause Stearic rotation of the troponin-tropomyosin complex?
    a. Ca++
    b. Na++
    c. K+
    d. Cl-
A

a. Ca++

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16
Q
  1. Which of the following organs produces cholecystokinin?
    a. Duodenum
    b. Pancreas
    c. Stomach
    d. Liver
A

a. Duodenum

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17
Q
  1. Which of the following substances is produced by fat cells that shut off the appetite centers in the hypothalamus?
    a. peptide YY
    b. Neuropeptide Y
    c. Ghrelin
    d. Leptin
A

d. Leptin

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18
Q
  1. Which of the following ions binds with calmodulin in smooth muscle contraction?
    a. Ca++
    b. Na++
    c. K+
    d. Cl-
A

a. Ca++

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19
Q
  1. Which of the following is responsible for the transportation of iron through the lumen?
    a. Hemosiderin
    b. Transferrin
    c. Hemoglobin
    d. Ferratin
A

b. Transferrin

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20
Q
  1. The mean arterial pressure which is measured millisecond by millisecond over a period of time is determined to be about ______.
    a. 50% systolic; 50% diastolic
    b. 60% systolic; 40% diastolic
    c. 60% diastolic; 40% systolic
    d. Is not calculated through this method
A

c. 60% diastolic; 40% systolic

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21
Q
  1. The total peripheral resistance can increase with sympathetic stimulation by as much as _____.
    a. Two times
    b. Three times
    c. Four times
    d. Five times
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A

c. Four times

22
Q
  1. Which of the following vitamins aids in the absorption of iron?
    a. Vitamin A
    b. Vitamin B
    c. Vitamin C
    d. Vitamin D
23
Q
  1. The adenohypophysis is responsible for the release of ______.
    a. Thyroid releasing factor
    b. Antidiuretic hormone
    c. Oxytocin
    d. Melanocyte stimulating hormone
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A

d. Melanocyte stimulating hormone

24
Q
  1. In the absence of vasopressin, where does the fluid go after it leaves the papilla?
    a. Minor calyx
    b. Major calyx
    c. Renal pelvis
    d. Ureter
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A

a. Minor calyx

25
25. The paraventricular nucleus produces which of the hormones? a. Vasopressin b. Oxytocin c. Aldosterone d. Cortisol
b. Oxytocin
26
26. Which of the following structures is located in the renal cortex? a. Ascending loop on Henle b. Descending loop of Henle c. Collecting duct d. Proximal convoluted tubules
d. Proximal convoluted tubules
27
27. The dense bodies of smooth muscle are connected to each other by ______. a. Actin b. Myosin c. Calmodulin d. Troponin
a. Actin
28
28. The cardiac gastric cells produce the following substance: a. hydrochloric acid b. Mucus c. Pepsinogen d. Intrinsic factor
b. Mucus
29
29. Which of the following hormones is responsible for making sure there is only one viable follicle releasing during the menstrual cycle? a. Luteinizing hormone b. Estrogen c. Inhibin d. Progesterone
c. Inhibin
30
30. Which of the following substances is produced by the zona fasciculata? a. Glucocorticoid b. Mineralcorticoid c. Androgen d. Catecholamines
a. Glucocorticoid
31
31. Which of the following minerals is required to complete the total process of the chloride shift? a. Ca++ b. Na++ c. Fe++ d. Zn++
d. Zn++
32
32. What of the following cells are responsible for decreasing surface tension in the lungs? a. J cells b. Dust cells c. Type 2 pneumocytes d. Type 1 pneumocytes
c. Type 2 pneumocytes
33
33. The use of ligand gating is classified as which of the following? a. facilitated diffusion b. Primary active transport c. Secondary active transport d. Co-transport
a. facilitated diffusion
34
34. Which of the following receptors is responsible for increasing the speed of cardiac conduction? a. Beta 1 b. Beta 2 c. Nicotine d. Muscarinic
a. Beta 1
35
35. Which of the following hormones is responsible for the initiation of spermatogenesis? a. Testosterone b. FSH c. LH d. Androgens
b. FSH
36
36. The conversion of angiotensin I to angiotensin II takes place in the ______. a. Liver b. Kidney c. Lungs d. Adrenal glands
c. Lungs
37
37. The A-band within the sarcomere contains which of the following? a. myosin fibers only b. Actin fibers only c. Actin and myosin fibers d. Empty space
c. Actin and myosin fibers
38
38. The fascial coverings of both nerve and muscles are made by which of the following cells ? a. Oligodendrocytes b. Schwann cells c. Fibroblasts d. Myoblasts
c. Fibroblasts
39
39. The contraction of a muscle with no joint movement is referred to as a _____ exercise a. Isometric b. Isotonic c. Isokinetic d. Closed chain
a. Isometric
40
40. If the Ph of the stomach increases it will have its greatest effect on the breakdown of which of the following substances? a. Carbohydrates b. Lipids c. Fiber d. Proteins
d. Proteins
41
41. If ATP converts to ADP in the muscle, what effect will it have on skeletal muscle contraction? a. No effect b. Increased contraction c. Slight decrease in contraction d. Strong decrease in contraction
b. Increased contraction
42
42. Which of the following substances is necessary for smooth muscle relaxation to occur? a. ATP b. Myosin phosphatase c. Myosin kinase d. Acetylcholinase
b. Myosin phosphatase
43
43. The reduction of sugar to it’s simple monosaccharide form is accomplished by ______. a. Ptyalin b. Disaccharase c. Dipeptase d. Amylase
b. Disaccharase
44
44. A decrease in estrogen levels will have it’s greatest effect on which part of the menstrual cycle? a. Release of FSH b. Release of inhibin c. Secretory phase d. Proliferative phase
d. Proliferative phase
45
45. The release of somatotropin into the blood will cause which of the following to occur? a. Sparing fats b. Sparing proteins c. Sparing carbohydrates d. Utilization if carbohydrates
c. Sparing carbohydrates
46
46. the inability of the posterior pituitary to release vasopressin will result in ______. a. Cushing's syndrome b. Addison's disease c. Diabetes mellitus d. Diabetes insipidus
d. Diabetes insipidus
47
47. Which of the following is not correct about fast twitch fibers? a. Have explosive powers b. White in color c. Use anaerobic glycolysis d. Have less glycolytic enzymes
d. Have less glycolytic enzymes
48
48. Which of the following brain waves disappears during sleep? a. Alpha b. Beta c. Delta d. Theta
a. Alpha
49
49. Which vitamin is necessary to prevent Nyctalopia? a. Ascorbic acid b. Folic acid c. Retinol d. Menadione
c. Retinol
50
50. When one neuron fires on many other neurons it is known as: a. Temporal summation b. Spatial summation c. Convergence d. Divergence
d. Divergence
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