| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
small intestine |
|
mouth |
|
large intestine |
|
stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
__________ and __________ pair to strengthen bones.
vitamin D, calcium |
|
calcium, vitamin A |
|
vitamin D, magnesium |
|
iron, calcium |
Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.
Which of these does not contain oxygenated blood?
left ventricle |
|
right atrium |
|
aorta |
|
pulmonary vein |
To provide oxygen to the body, blood flows through the heart in a path formed by the right atrium → right ventricle → lungs → left atrium → left ventricle → body. When blood enters the right side of the heart it is deoxygenated. It enters the left side of the heart oxygenated after traveling to the lungs.
Elements in the same group in the Periodic Table of the Elements have the same:
number of atomic mass units |
|
number of electrons |
|
number of electrons in their outer electron shell |
|
number of electron shells |
The columns of the Periodic Table are called groups and all elements in a group have the same number of electrons in their outer electron shell. The group that an element occupies generally determines its chemical properties as the number of outer shell electrons establishes the way it reacts with other elements to form molecules. So, because each element has the same number of electrons in its outer shell, each has similar reactivity.
Which of the following is the smallest component of an element that still retains the properties of the element?
atom |
|
neutron |
|
element |
|
molecule |
An atom is the smallest component of an element that still retains the properties of the element.