Spinal anatomy from 9/99 Flashcards
\_\_\_\_\_\_is contraction as \_\_\_\_\_\_\_\_\_is to relaxation. A. Diastole; systole B. Systole;diastole C. Ejection; filling D. Filling; relaxing
B. Systole;diastole
Which of the following would increase heart rate?
A. increase levels of norepinephrine and/ or epinephrine
B. faster depolarization of the pacemaker potential
C. increased sympathetic stimulation of the SA node
D.decreased parasympathetic stimulation of nodal fibers
E. all of the above
E. all of the above
If the pacemaker cells in the SA node become more permeable to potassium ions, the
A. heart rate will increase
B. membrane will hyperpolarize
C. membrane will depolarize
D. heart rate will decrease
E. both heart rate will decrease and membrane will hyperpolarize
E. both heart rate will decrease and membrane will hyperpolarize
Abnormally slow depolarization of the ventricles would most change the shape of the \_\_\_\_\_\_in an ECG. A. QRS complex B. T wave C. R-T interval D. P wave E. P-R interval
A. QRS complex
A percent fraction of formed elements relative to whole blood is the : A. hematocrit B. specific gravity C. differential cell count D. packed volume E. viscosity
A. hematocrit
The volume of blood ejected from ventricle during a contraction is called the : A. end- diastolic B. cardic output C. cardiac reserve D. end- systolic volume E. stroke volume
E. stroke volume
Each of the following changes will result in increased blood flow to a tissue, except: A. relaxation of precapillary sphincters B. increased vessel diameter C. increased blood pressure D. increased hematocrit E. decreased peripheral resistance
D. increased hematocrit
Total peripheral resistance is related to all of the following, except the : A. osmolarity of intersitial fluids B. blood vessel diameter C. length of a blood vessel D. blood visocosity E. flow characteristics
A. osmolarity of intersitial fluids
Which of the following regulates blood flow through the body? A. turbulence B. vascular resistance C. blood viscosity D. vessel diameter E. all of the above
E. all of the above
Exchange between a blood vessel and the cells that surround it can occur only in: A. arteries B. venules C. arterioles D. caprillaries E. veins
D. caprillaries
Lymphatic vessels commomly occur in association with:
A. hyaline cartilage
B. sensory nerve endings
C. adipode tissue
D. blood vessels
E. both hyaline cartilage and adipode tissue
D. blood vessels
Lymph nodes do all of the following, except that they:
A. Produce antibodies
B. monitor the contents of lymph
C. detect pathogens
D. remove excess nutrients from the lymph
E. remove debris and pathogens
D. remove excess nutrients from the lymph
Platelets function in all of the following , except:
A. initiating the clotting process
B. releasing chemicals the stimulate clotting
C. contraction after clot formation
D. forming a temporary clump in injured areas
E. dissolving a formed clot
E. dissolving a formed clot
People with type AB blood are considered the “universal recipient” for transfusions because:
A. their blood cells lack A and B antigens
B. they are usually Rh negative
C. their blood lacks A or B antibodies
D. they usually have very strong immune systems
E. their blood is plentiful in A and B antibodies
C. their blood lacks A or B antibodies
When the diaphragm and external intercostal muscles contract, A. the lungs shrink B. expiration occurs C. the volume of the thorax decreases D. the volume of the thorax increases E. the volume of the lungs decreases
D. the volume of the thorax increases
In quiet breathing,
A. inspiration and expiration involve muscular contractions
B. inspiration is passive and expiration involve muscle contractions
C. inspiration involves muscular contractions and expiration is passive
D. inspiration and expiration are both passive
E. none of the above
C. inspiration involves muscular contractions and expiration is passive
Which of the following can be calculated if the tidal volume and respiratory rate are known? A. respiratory minute volume B. inspiratory reserve volume C. forced vital capacity D. expiratory reserve volume E. anatomical dead space
A. respiratory minute volume
\_\_\_\_\_\_\_\_\_\_equals the respiratory rate X (tidal volume)- anatomic dead space) A. pulmonary ventilation B. external respiration rate C. respiratory minute volume D. vital capacity E. alveolar ventilation rate
E. alveolar ventilation rate
In response to respiratory alkalosis the, A. respiratory rate increases B.kidneys secrete more hydrogen ions C. tidal volume increases D. kidneys retain more hydrogen ions E. kidneys conrerve biocarbonate
D. kidneys retain more hydrogen ions
The most powerful respiratory stimulus for breathing in healthy person is\_\_\_\_\_\_ A. loss of oxygen in tissues B. increase of carbon dioxide C. pH (acidosis) D. pH (alkalosis)
B. increase of carbon dioxide
For maximum loading of hemoglobin with oxygen at the lungs, the:
A.BPG levels in the red bloods cells should be high
B. PCO2 should be low
C. PCO2 should be high
D. PO2 should be about 70 mmHg
E. pH should be slightly acidic
B. PCO2 should be low
Most of the oxygen transported by the blood is
A. carried by white blood cells
B. dissolved in plasma
C. bound to the same protein as carbon dioxide
D. bound to hemoglobin
E. in iconic form as solute in the plasma
D. bound to hemoglobin
The respiratorty membrane of the gas exchange surfaces consists of:
A. moist cuboidal epithelium
B. simple squamous epthellium
C.cliliated squamous
D. sufactant cells
E. pseudostratified cliliated columar epithelium
B. simple squamous epthellium
The actual sites of gas exchange within the lungs are: A. alveoli B. terminal bronchioles C. interlobular septa D. pleural spaces E. bronchioles
A. alveoli