The muscular system allows our bones to
(1 point)
Responses
strengthen.
strengthen.
contract.
contract.
lengthen.
lengthen.
move.
move.
I think its streangthen
No, the correct answer is "contract." The muscular system allows our bones to contract, or shorten, which in turn allows us to move.
4 of 214 of 21 Items
Question
This muscle helps to transport blood to and from the heart.
(1 point)
Responses
smooth muscle
smooth muscle
cardiac muscle
cardiac muscle
skeletal muscle
skeletal muscle
involuntary muscle
involuntary muscle
The correct answer is "cardiac muscle." Cardiac muscle assists in transporting blood to and from the heart.
The blood vessels that return blood to the heart from the rest of the body are
(1 point)
Responses
capillaries.
capillaries.
veins.
veins.
arteries.
arteries.
valves.
The correct answer is "veins." Veins are the blood vessels that return blood to the heart from the rest of the body.
It is the middle of the winter and like everyone else you have caught a cold, your body relies on your ___________ to help boost your immune system.
(1 point)
Responses
plasma
plasma
red blood cells
red blood cells
white blood cells
white blood cells
platelets
The correct answer is "white blood cells." White blood cells help to boost the immune system and fight off infections, including colds.
Question
During the exchange of air in your lungs, your body seeks to keep oxygen and release ______________ which will then exit your body
(1 point)
Responses
microorganisms
microorganisms
carbon dioxide
carbon dioxide
plasma
plasma
mucus
mucus
The correct answer is "carbon dioxide." During the exchange of air in the lungs, oxygen is taken in and carbon dioxide is released. Carbon dioxide then exits the body through exhalation.
It is important that you maintain a healthy weight both for your overall health and so that your respiratory system can
(1 point)
Responses
deliver oxygen more adequately.
deliver oxygen more adequately.
pump blood more forcefully from the heart.
pump blood more forcefully from the heart.
keep capillaries constricted.
keep capillaries constricted.
allow for smaller amounts of air to enter your lungs.