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【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
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举一反三
【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
【单选题】The main characteristics of ventricular myocyte action potential are（ ）
A.
Phase 4 is the resting period
B.
Formation of phase 2 platform
C.
0 depolarization is slow
D.
No obvious phase 1
E.
Phase 4 automatic depolarization
【多选题】What is true about the physiological description（ ）
A.
The object of study is organism
B.
Belonging to a branch of biology
C.
It is not only a basic medical subject, but also an experimental subject
D.
The normal physiological function of the body
E.
Study the laws of physical movement in the body