Science of the Human Body

how many chromosones do you have

• 43

• 34

• 46

• 109

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how many chromosomes do you get from you mom

• 23

• 31

• 46

• 100000000

how many organs are in the human body

• 78

• 87

• 56

• 565656

what is this

• kidney

• lungs

• eyes

• liver

The breathing rate of a human increases after exercise. The part of the brain that controls this involuntary action is

• cerebrum

• cerebellum

• medulla

• spinal cord

A man suffers a head injury during a basketball game. For several days afterward, he can't remember his social media passwords. This memory loss results from damage to the man's

• cerebrum

• cerebellum

• medulla

• spinal cord

Which part of the human brain is correctly paired with its function?

• spinal cord - coordinates learning activities

• cerebellum - serves as the center for breathing and other actions

• cerebrum - serves as the center for thinking and learning

• medulla - maintains muscle control

When a child runs inside after hearing a car crash outside, the child is using:

• the central nervous system, only

• the peripheral nervous system, only

• both the central and peripheral nervous systems

• neither the central nor the peripheral nervous system

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The peripheral nervous system consists of the

• neurons located in the brain and the spinal cord

• nerves that extend from the brain and the spinal cord

• interneurons of the central nervous system

• portions of the brain known as the medulla and cerebellum

What is the primary function of the human respiratory system?

• To circulate blood throughout the body

• To break down food into nutrients

• To exchange gases between the body and the environment

• To transmit nerve signals