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【单选题】
The excitatory effect of hypoxia on respiration is via（ ）
A.
Direct stimulation of the respiratory center
B.
Direct excitation of inspiratory neurons in the medulla oblongata
C.
Direct stimulation of the pons respiratory regulation center
D.
Stimulate the central chemoreceptor and stimulate the respiratory center
E.
Reflexive effects achieved by peripheral chemoreceptors
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举一反三
【单选题】The main cause of oliguria caused by injection of norepinephrine is（ ）
A.
Elevated plasma colloid osmotic pressure
B.
The permeability of filtration membrane is reduced
C.
Increased intracapsular pressure
D.
Increased secretion of vasopressin
E.
The glomerular capillary blood pressure was significantly reduced
【多选题】Currents caused by the opening of which of the following channels contribute to the repolarization phase of the action potential of ventricular muscle fibers?（ ）
A.
HCO3- channels
B.
K+ channels
C.
Ca2+ channels
D.
Na+ channels
E.
Cl- channels
【多选题】Factors affecting resting potential level include（ ）
A.
Relative permeability of the membrane to K+ and Na+
B.
Na+ pump activity
C.
Na+ concentration gradient between both sides of the membrane
D.
K+ concentration gradient between both sides of the membrane
E.
Cl- concentration gradient between both sides of the membrane
【多选题】The regulators of eukaryotic gene expression consist of________.（ ）
A.
insulator
B.
enhancer
C.
promoter
D.
silencer
【单选题】Spinal shock is caused by（ ）
A.
Transverse spinal cord injury stimulation
B.
Loss of high central control of the subsectional spinal cord
C.
Loss of initial motor function in the reticular facilitation area of the brainstem
D.
Metabolic disorders due to trauma
E.
Massive bleeding during spinal cord transection
【多选题】The physiological hemostasis process includes（ ）
A.
Agglutination of erythrocytes
B.
Formation of platelet thrombosis
C.
Constriction of blood vessels at the site of injury
D.
Plasminogen becomes plasminase
E.
Fibrinogen becomes fibrin
【单选题】The supraoptic nucleus of the hypothalamus is mainly synthesized（ ）
A.
Antidiuretic hormone
B.
follicle-stimulating hormone
C.
luteinizing hormone
D.
Prolactin
E.
Growth hormone
【单选题】Based on Meselson-Stahl experiment, each daughter DNA molecule is composed of（ ）
A.
two strands with both new and old DNA
B.
one old and one new strand
C.
two new daughter strands
D.
two old parental strands
【多选题】The total lung volume is equal to（ ）
A.
Tidal volume + functional residual capacity
B.
Functional residual capacity + inspiratory reserve volume + tidal volume
C.
Vital capacity + residual volume
D.
Residual volume + inspiratory reserve volume + expiratory reserve volume + tidal volume
E.
Inspiratory reserve volume + expiratory reserve volume