Which of the following most likely happens when astronauts go to space? – Their heart rate speeds up because the blood

Which of the following most likely happens when astronauts go to space?

– Their heart rate speeds up because the blood vessels have less blood to circulate . – Their heart rate speeds up because the blood vessels have more blood to circulate . – The blood vessels in their neck caves in because the heart pumps less blood per beat.- The blood vessels in their neck bulges out because the heart pumps more blood per beat.

Leave a Reply

Your email address will not be published. Required fields are marked *