If a person has lost a significant amount of blood but still maintains a normal blood pressure it does not necessarily mean that the person is maintaining adequate perfusion. which of the following best explains why this is so?
blood vessels are constricting causing greater peripheral resistance.
the heart has increased its rate to increase cardiac output.
the sympathetic nervous system has increased its nervous impulses.
the heart has increased its contractile force increasing cardiac output.

Blood vessels are constricting causing greater peripheral resistance

Explanation:

When the body experiences a significant amount of blood loss, the body will constrict the blood vessels to compensate for the blood loss. This results in the blood flow and pressure remaining in at a normal level. This does also result in your a decrease of the amount of blood your heart pumps to areas outside of the centre or your body, which causes the skin to lose heat and become paler.

due to the fact that it skipped a generation we can tell it is definitely not a dominant trait, therefore it must be recessive. i think this is right let me know!

explanation:

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.