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【单选题】

Quantitatively, the most important form of carbon dioxide transport it?( )

A.
CO2 combined with plasma proteins
B.
HCO3- produced in erythrocyte
C.
CO2 dissolved in the erythrocyte
D.
HCO3- produced in plasma
E.
CO2 dissolved in plasma
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【单选题】The wrong description about the role of the sympathetic nerve on the heart is that( )

A.
Beta receptors on the membrane of the heart muscle
B.
The transmitter released from the end is norepinephrine
C.
Increase ventricular end-diastolic volume
D.
Increase cardiac output
E.
It can accelerate heart rate and strengthen myocardial contractility

【多选题】Which of the following organ activities is involved in maintaining homeostasis in the internal environment( )

A.
The digestion and absorption of the digestive system
B.
Excretory function of the kidney
C.
Contraction of skeletal muscle
D.
Respiration
E.
Blood circulation

【多选题】The conditions for determining basal metabolic rate are( )

A.
Fasted at least 12 hours prior to measurement
B.
Take a seat during measurement
C.
Measured shortly after waking in the morning
D.
Keep the room temperature between 20℃ and 25℃
E.
Keep emotion quiet

【单选题】The site of glucose reabsorption in the kidney is at( )

A.
Thick ascending branch of loop of medullary
B.
Proximal tubule
C.
Loop of medullary loop
D.
Distal convoluted tubules and manifolders
E.
Thick segment of descending branch of loop of medullary

【单选题】The energy required for K+ outflow generating the resting potential comes from( )

A.
Electrochemical gradient
B.
Potential gradient
C.
Concentration gradient of Na+ across membrane formed by active transport of Na+ pump
D.
ATP
E.
Its own transmembrane concentration gradient

【单选题】The somatosensory cortex locates mainly at( )

A.
Anterior central gyrus
B.
Temporal cortex
C.
Limbic system
D.
posterior central gyrus
E.
Insular cortex

【单选题】The main cause of presbyopia is( )

A.
Increased corneal curvature
B.
Weakened lens elasticity
C.
Changes in corneal transparency
D.
Lens opacity
E.
Poor aqueous humor circulation

【单选题】The rhythmicity of breathing is thought to originate solely in the:( )

A.
Dorsal respiratory group of medullary neurons
B.
Apneustic center
C.
Ventral respiratory group of medullary neurons
D.
Rapidly adapting pulmonary stretch receptors
E.
Pons

【单选题】Secreting endogenous factors is( )

A.
Stem cells
B.
Chief cells
C.
Myxocytes
D.
Wall cells
E.
G cells in the gastric pylorus