Which of the following is false as physiological change in pregnancy?
**Core Concept**
During pregnancy, various physiological changes occur to accommodate the growing fetus and prepare the mother's body for childbirth. These changes involve multiple systems, including the cardiovascular, respiratory, and renal systems. One of the key physiological changes in pregnancy is the increase in blood volume.
**Why the Correct Answer is Right**
The correct answer is related to the physiological changes in the respiratory system during pregnancy. Normally, the respiratory system undergoes changes such as an increase in tidal volume and minute ventilation to compensate for the increased metabolic demand. However, there is no significant decrease in functional residual capacity (FRC) in pregnancy.
* **Option A:** This option might be true and is not the focus of this explanation.
* **Option B:** This option is incorrect because there is an increase in tidal volume and minute ventilation, not a decrease.
* **Option C:** This option is incorrect because there is an increase in respiratory rate and tidal volume, not a decrease.
* **Option D:** This option is incorrect because there is an increase in respiratory rate and tidal volume, not a decrease.
**Clinical Pearl / High-Yield Fact**
It's crucial to remember that respiratory changes during pregnancy are generally adaptive, preparing the mother's body for the increased oxygen demand of the fetus. However, these changes can be influenced by factors such as maternal age, parity, and pre-existing respiratory conditions.
**Correct Answer:** B. There is no significant decrease in functional residual capacity (FRC) in pregnancy.