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【多选题】
The increase in systolic blood pressure during strenuous exercise is due to（ ）
A.
Increased stroke volume
B.
Increased heart rate
C.
Increased initial length of myocardium
D.
Increased venous return blood volume
E.
Increased myocardial contractility
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【多选题】What should not be present in normal urine（ ）
A.
Glucose
B.
NaCl
C.
Urea
D.
Protein
E.
Red blood cells
【单选题】In prokaryotes, RNA polymerase can bind upstream sequences of promoters directly. Eukaryotes need some proteins to facilitate the binding. What are the names of these proteins? （ ）
A.
Introns
B.
TATA box proteins
C.
Exons
D.
Transcription factors
【多选题】In order to relax the muscle, which point can be suppressed during the process of the nerve-muscle junction（ ）
A.
Release of ACh from nerve endings
B.
Nerve terminal cytoplasmic Ca2+
C.
ACh receptor gated channel on endplate membrane
D.
Ca2+ channels in nerve endings
E.
cholinesterase on endplate membrane
【多选题】The physiological effects of glucocorticoids are（ ）
A.
Enhance the body's resistance to stress stimulation
B.
Increase hepatic glycogenesis and decrease sugar utilization
C.
Promote catecholamine degradation
D.
Increase the secretion of gastric acid and pepsinogen
E.
Lower the number of lymphocytes
【多选题】Which is correct in the following statement about peripheral neurotransmitters（ ）
A.
Acetylcholine is the transmitter released by most parasympathetic postganglia fibers
B.
The transmitter released by autonomic preganglionic fibers is acetylcholine
C.
The transmitter released by somatic motor nerve endings is acetylcholine
D.
Norepinephrine is the transmitter released by all sympathetic postganglionic fibers
E.
Purine and peptide transmitters are released by nerve plexus cells in the gastrointestinal wall
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A.
provides 3’-OH to synthesize DNA
B.
stays in the daughter DNA duplex
C.
activates DNA polymerase
D.
is required by all Okazaki fragments
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A.
inducible gene
B.
constant gene
C.
housekeeping gene
D.
repressible gene
【单选题】Among the following factors, which one could deliver the aminoacyl-tRNA to the A site of ribosome?（ ）
A.
IF-2
B.
EF-Tu
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EF-G
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EF-Ts
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A.
Thoracic retraction
B.
Alveolar surface tension
C.
Airway resistance
D.
Pulmonary surfactant
E.
Elastic retractive force of lung
【多选题】Which of the following statements about the effect of the sympathetic nerve on the heart is correct（ ）
A.
Increase heart rate
B.
Enhance myocardial contractility
C.
Slow heart rate
D.
Reduce stroke volume
E.
Increase the conduction velocity