Reproduction

During pregnancy, uterine blood flow in mammals increases to meet the metabolic demands of the growing fetuses.

The table below shows the rate of blood flow per kilogram of uterine tissue for a pregnant and a non-pregnant rabbit (doe):

Rabbit status	Blood flow per kg of uterus ( $cm3\text{cm}^3$ per minute)
pregnant	$15.6$
non-pregnant	$1.2$

Calculate the difference in the volume of blood flow per kg of uterus in a 36-hour period. Give your final answer in $cm3\text{cm}^3$ .

[3]

Explain two biological advantages to the developing rabbit fetuses of this increased blood flow.

[2]

Reproduction Questions

During pregnancy, uterine blood flow in mammals increases to meet the metabolic demands of the growing fetuses.

The table below shows the rate of blood flow per kilogram of uterine tissue for a pregnant and a non-pregnant rabbit (doe):

Rabbit status	Blood flow per kg of uterus ( $cm3\text{cm}^3$ per minute)
pregnant	$15.6$
non-pregnant	$1.2$

Calculate the difference in the volume of blood flow per kg of uterus in a 36-hour period. Give your final answer in $cm3\text{cm}^3$ .

[3]

Explain two biological advantages to the developing rabbit fetuses of this increased blood flow.

[2]