第 1 題
1 分Which type of white blood cell is characterised by a large, spherical or slightly indented nucleus that occupies most of the cell and produces antibodies during an immune response?
Cambridge International A Level · Biology (9700)
Transport in mammals：練習題
5 條多項選擇題即時批改，另有 2 條文字題附完整解題步驟，全部圍繞「Transport in mammals」。
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第 2 題
1 分What causes the atrioventricular (AV) valves to close during the mammalian cardiac cycle?
第 3 題
1 分Why is there a critical delay of approximately \(0.1\text{ s}\) at the atrioventricular node (AVN) before the electrical excitation spreads down the Purkyne tissue to the ventricles?
第 4 題
1 分Which enzyme inside red blood cells catalyses the reversible conversion of carbon dioxide and water into carbonic acid?
第 5 題
1 分During electrical coordination of the mammalian heart, why is there an essential delay in the transmission of the electrical impulse at the atrioventricular node (AVN)?
第 6 題
6 分Describe the key events during ventricular systole in the human cardiac cycle, including changes in blood pressure, valve actions, and the resultant blood flow.
先自己寫一次答案，再對照解題步驟。
第 7 題
7 分The mammalian heart is a highly efficient pump that ensures continuous blood flow throughout the body.
(a) Describe the sequence of events that occurs during one complete cardiac cycle, referring to pressure changes and valve actions.
(b) Explain how the sinoatrial node (SAN) and atrioventricular node (AVN) coordinate the contractions of the heart chambers.
先自己寫一次答案，再對照解題步驟。
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