The main productive force in childbirth is
A: Uterine contractility
B: Diaphragm contractility
C: Levator ani muscle contractility
D: Abdominal muscle contractility
A: Uterine contractility
B: Diaphragm contractility
C: Levator ani muscle contractility
D: Abdominal muscle contractility
举一反三
- The factors affecting delivery are ( ). A: uterine action B: birth canal C: uterine contractility (rhythmicity, symmetry, polarity, retraction<br/>effect) D: contractility of abdominal wall muscle and diaphragm and<br/>contractility of levator ani muscle
- The main power in delivery is: () A: Uterine contraction B: Abdominal muscles and C: diaphragm contraction D: levator ani muscle contractility E: The psyche
- The factors enhancing contractility of muscle are () A: Ca2+ B: caffeine C: adrenaline D: hypoxia E: acidosis
- The stroke volume is mainly regulated by A: Preload of the ventricle B: Afterload of the ventricle C: Contractility of the ventricle D: Heart rate E: Tone of the vagus nerve
- Which of the following muscle is voluntary muscle？ A: cardiac muscle B: smooth muscle C: biceps D: diaphragm