41⟩ ABO and rhesus (Rh) system, a person of group O is a universal donor
True
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120 Psychology Questions And Answers
42⟩ ABO and rhesus (Rh) system, the second rhesus positive baby of a Rh negativemother is at a greater risk than the first
True
43⟩ The oxygen dissociation curve is shifted to the right with respiratory acidosis
True
44⟩ ABO and rhesus (Rh) system, the presence of the D antigen means that thesubject is Rh positive
True
45⟩ The oxygen dissociation curve is shifted to the right with poly-cythaemia
False
46⟩ A class of ion passes through an open channel
* a) When there is an electrochemical gradient for this ion across the membrane.
* b) Because ion pumps transport the ion across the membrane
* c) Because the selectivity filter conducts the ion through it.
* d) Because other ions of the same class link up together, and drag the ion with it.
* e) Because the voltage gates act as paddles, to sweep the ions through
Answer - a
47⟩ Social learning experiments on the modeling of aggressive behavior have demonstrated that
* a) Children are not affected by watching violence on television
* b) Abusive parenting accounts for most children’s aggressive acts
* c) Children can develop aggressive behavior simply by watching others perform aggressive acts
* d) Children’s aggressive behavior must be reinforced for it to be repeated
* e) Children imitate aggressive behavior seen on television only if the media violence is performed by children
Answer - c
48⟩ Ion channels in ventricular myocytes
* a) Are highly specialized phospholipids molecules.
* b) Extend from one side of the cell to the other.
* c) Let any substance pass through, so long as it is an ion.
* d) Stay open for several seconds at a time.
* e) Are generally controlled by the voltage across the membrane
Answer - e
49⟩ Pulmonary surfactant
* a) Prevents large alveoli from emptying into smaller alveoli
* b) Prevents forced expiratory efforts from emptying the alveoli.
* c) Increases the filtration of fluid from pulmonary capillaries into the alveoli.
* d) Prevents small alveoli from emptying into large alveoli
* e) Keeps the lungs and thoracic wall together
Answer - d
50⟩ A voltage-gated ion channel in a ventricular myocyte
* a) Usually has a single gate that opens and closes.
* b) Sometimes, have two gates that open and close together.
* c) Is always closed when the cell is resting
* d) Selects the type of ion that passes across the membrane
* e) Usually close when the membrane potential depolarizes.
Answer - d
51⟩ If the heart of a resting normal person is increased from 60 to 90 beats per minute by artificial atrial pacing
* a) Cardiac output will increase by at least 50%.
* b) Stroke volume will not be affected appreciably.
* c) Cardiac output will not be affected appreciably.
* d) Arterial pulse pressure will increase.
* e) Central venous pressure will increase.
Answer - c
52⟩ Red blood cells measured 15 um in diameter
False
53⟩ An 8-year-old normal girl (30 kg body weight) has a breathing frequency of 20 per Minute at rest and a tidal (breath) volume of 80 ml, her total ventilation is closest to
* a) 0.25 L/min.
* b) 0.6 L/min.
* c) 1.6 L/min.
* d) 2.4 L/min.
* e) 32 L/min
Answer - c
54⟩ In a 60-year-old hypertensive person, the commonly observed increase in arterial pulse pressure is caused by
* a) Increased stroke volume
* b) Increased myocardial contractility
* c) Decreased mean circulatory pressure
* d) Decreased arterial compliance
* e) Increased heart rate
Answer - d
55⟩ Hypoxia, such as occurs at high altitude
* a) Increases partial pressure of arterial blood CO2
* b) decreases blood pH.
* c) Decreases peripheral resistance
* d) Increases the respiratory rate
* e) Decreases blood pressure
Answer - d
56⟩ Which of the following statements is correct?
* a) An increase in pressure in the pulmonary artery may cause hypertrophy of the left ventricle.
* b) Rupture of the myocardium is not life threatening as long as the pericardial sac remains intact.
* c) Myocardial rupture would most likely occur sometime after two weeks following a myocardial infarction.
* d) A disease, which increases blood pressure in the pulmonary artery, may lead to right ventricular failure.
* e) None of the above statements is true.
Answer - d
57⟩ Angiotensin converting enzyme (ACE) inhibitors
* a) Inhibit the conversion of angiotensin to renin.
* b) Reduce the synthesis of angiotensin II and the subsequent release of aldosterone.
* c) Inhibit the release of renin by the kidneys.
* d) Inhibit the conversion of angiotensinogen to angiotensin I.
* e) Increase blood pressure by their vasoconstrictor actions in renal arteries.
Answer - b
58⟩ Predominant emphysema
* a) Is typically characterized by a productive cough
* b) Is a reversible disease of large and small airways?
* c) Has a more severe course in people with high levels of antiproteases - (antielastase)
* d) Is caused by pulmonary hypertension
* e) None of the above is correct
Answer - c
59⟩ A single cross-bridge cycle can move a thin filament
* a) Without the release of energy from ATP
* b) About 2.5 mm (2.5 x 10-3m)
* c) Along the entire length of an intact myosin molecule
* d) About 10 nm (10 x 10-9m)
Answer - d
60⟩ During the later stages of pregnancy, maternal blood pressure can fall if the woman lies on her back (supine hypotension). This is due to
* a) A reduction in maternal venous return
* b) A decrease in maternal heart rate because of the uterus pressing on the heart through the diaphragm
* c) Compression of the vena cava
* d) Increased fetal activity associated with discomfort due to compression of the fetus against the maternal vertebral column.
Answer - b
