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【单选题】
The common component composed of DNA and RNA is _____（ ）
A.
D-2-deoxyribose
B.
Thymine
C.
D-ribose
D.
Guanine
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刷刷题刷刷变学霸
举一反三
【单选题】In general, the diastolic pressure can reflect（ ）
A.
Elasticity of the aorta
B.
Stroke volume
C.
Peripheral resistance
D.
How much blood is returned
E.
Heart rate
【单选题】Intravenous injection of 20% glucose solution in rabbits resulted in increased urine output due to（ ）
A.
Increased glomerular filtration rate
B.
Increased solute concentration of tubule fluid
C.
Increased aldosterone secretion
D.
ADH secretion is decreased
E.
Increased glomerular effective filtration pressure
【多选题】Digestive juices that can digest protein are（ ）
A.
Pancreatic juice
B.
Small intestinal juice
C.
Gastric juice
D.
Bile
E.
Saliva
【单选题】Sequences that are removed from the primary RNA transcript in eukaryotes are called________.（ ）
A.
operons
B.
mRNA
C.
introns
D.
exons
【单选题】Substance that achieve the excitation-contraction coupling is（ ）
A.
K+
B.
Mg2+
C.
Ca2+
D.
Na+
E.
Cl-
【单选题】Which of the following stimulates glycogen synthesis in hepatic cells?（ ）
A.
Glucagon
B.
Growth hormone
C.
Insulin
D.
Glucagon
E.
Epinephrine
【单选题】Animals that are cut the brain stem between the upper and lower colliculus of the midbrain will appear（ ）
A.
Upper motor neuron palsy
B.
Spinal shock
C.
Spastic paralysis of the limbs
D.
Rigor mortis after cortical removal
E.
Brain rigor mortis
【多选题】The physiological characteristics of red blood cells are（ ）
A.
Plastic deformation
B.
Osmotic brittleness
C.
Suspension stability
D.
Chemotaxis
E.
Release
【单选题】The main reason for decreased urine production during tempestuous exercise is（ ）
A.
Elevated blood pressure in glomerular capillaries
B.
Renal arterioles contracted and renal blood flow decreased
C.
Increased secretion of aldosterone
D.
Increased secretion of antidiuretic hormone
E.
decreased glomerular filtration area
【多选题】Ventricular muscle cells differ from skeletal muscle cells in（ ）
A.
Long effective refractory period
B.
The ascending and descending branches of the action potential are asymmetrical
C.
Depolarization is caused by calcium influx
D.
There is an obvious plateau
E.
Duration of action potential