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【单选题】
The maximum action potential is generated when the cell is properly stimulated（ ）
A.
Normal period
B.
Subnormal period
C.
Relative refractory period
D.
Supernormal period
E.
Absolute refractory period
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参考答案：
参考解析：
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举一反三
【单选题】Hormones that promote gastric secretion and gastric motility are （ ）.
A.
Pancreatic polypeptide
B.
Cholecystokinin
C.
Gastrin
D.
Trypsin
E.
Gastric inhibitory peptides
【多选题】The functions of cone cells are（ ）
A.
High visual acuity
B.
There is only one visual pigment
C.
Distinguish the colors of objects
D.
Poor sensitivity to light
E.
Photopic vision
【多选题】The following components associated with ESR are（ ）
A.
Plasma
B.
the platelet
C.
Red blood cells
D.
White blood cells
E.
Monocytes
【单选题】The main function of the specific projection system of the thalamus is（ ）
A.
Maintain awareness
B.
Regulate visceral function
C.
Coordination muscle tension
D.
Cause specific feelings
E.
Cause referred pain
【单选题】The concentration of hormones in the blood is extremely low, but the physiological effects are very obvious because（ ）
A.
Hormones are distributed throughout the body along with the blood
B.
high specificity of hormone
C.
Hormones have very long half-lives
D.
There is a highly efficient bioamplification system in cells
E.
Long duration of hormone secretion
【单选题】All the following shift the oxyhemoglobin dissociation curve to the right except: （ ）
A.
An increase in PCO2
B.
An increase in PCO
C.
Increase in 2, 3-DPG
D.
An increase in the concentration of H+ in blood
E.
An increase in temperature
【单选题】Which can measure cardiomyocyte autorhythmicity（ ）
A.
The level of threshold potential
B.
Maximum repolarization potential level
C.
Amplitude of the action potential
D.
Rate of depolarization in phase 0
E.
Rate of automatic depolarization in phase 4
【多选题】Belongs to the internal environment is（ ）
A.
Urine
B.
Cerebrospinal fluid
C.
Plasma
D.
Lymph
E.
Interstitial fluid
【单选题】Which is correct about the following description of ADH（ ）
A.
When the osmotic pressure of plasma crystal increases, its release volume decreases
B.
Synthesized and secreted by the neurohypophysis
C.
When arterial blood pressure decreases, its release volume increases
D.
When circulating blood volume increases, its release volume increases
E.
Improve water reabsorption by proximal tubules
【单选题】In the depolarization phase of nerve cell action potential Na+ transport belongs to（ ）
A.
Primary active transport
B.
Secondary active transport
C.
Exocytosis
D.
Facilited diffusion
E.
Simple diffusion