Answer to Question 1
1
Rationale:
1. With hyperventilation, there is a fall in PaCO2, and respiratory alkalosis results.
2. Metabolic alkalosis would not occur with hyperventilation.
3. Respiratory acidosis can occur as a woman's PaCO2 levels rise during the second stage of labor.
4. By the end of the first stage, a mild metabolic acidosis might have developed, not because of hyperventilation but because of compensation to the respiratory alkalosis.
Answer to Question 2
2
Rationale:
1. Only the head of the sperm enters the ovum in a twofold process known as capacitation and acrosomal reaction.
2. Only the head of the sperm enters the ovum in a twofold process known as capacitation and acrosomal reaction.
3. Only the head of the sperm enters the ovum in a twofold process known as capacitation and acrosomal reaction.
4. Only the head of the sperm enters the ovum in a twofold process known as capacitation and acrosomal reaction.
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