[試題] 101下 李士傑 普通生物學丙 第四次小考
課程名稱︰普通生物學丙
課程性質︰
課程教師︰鄭石通 李士傑
開課學院：
開課系所︰物理治療學系 職能治療學系
考試日期（年月日）︰
考試時限（分鐘）：
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1.What is sperm capacitation?
2.Please describe the changes in membrane potential and ion flow across
the membrane during different stages of an action potential.
3.What is the most commonly used olfactory receptor? How many trans-membrane
domains does it have? What is the adaptor protein to transduce its signal
in the cell?
4.Draw the structure of a sarcomere. Tell me why calcium is needed to trigger
the sliding of a sarcomere?
參考答案：
1.
During transportation of sperm in female reproduction tract, sperm gradually
acquire ability to fertilize oocytes. This process is called capacitation.
2.
An electrical stimulus first raises membrane potential to pass threshold.
Na+ channels open that allow the Na+ ion to flow in and cause depolarization
of membrane.
Depolarization close Na+ and open K+ channels
K+ ions leak out of cells to cause hyperpolarization and K+ channels close.
Eventually all channels are back to their resting state and membrane
repolarizes to the resting membrane potential.
3.
G-protein-coupled receptors have 7 transmembrane domains and use G-proteins
to transduce signal.
4.
Calcium binds to tropomyosin to remove its block to sliding.
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