Anatomy and physiology quiz 2

The normal pH of blood is _________.

7.4

Which of the following statements about chemical bonds is true?

Covalent bonds are stronger than ionic bonds.

Which of the following is a molecule, but not a compound?

H2

The pH of lemon juice is 2, and the pH of orange juice is 4. Which of these is more acidic? By how much?

The lemon juice. 100 times.

Ty is three years old and as a result of a "stomach bug" has been vomiting for about 24 hours. His blood ph is 7.48. What does this mean?

Tys blood is slightly alkaline

Which of the following is a functional group that is part of a building block of proteins?

amino

When an atom donates an electron to another atom, it becomes

an ion

The smallest unit of an element that still retains the distinctive behavior of that element is an __________

atom

List the four types of organic compounds most important to human structure and function.

carbohydrates, lipids, proteins, nucleotides

A _____ is a substance composed of two or more elements joined by a chemical bond.

compound

In DNA, nucleotide bonding forms a compound with a characteristic shape known as a(n) ___________

double helix

Which organic compound do brain cells primarily rely on for fuel?

glucose

Together, just four elements make up more than 95% of the body's mass. These include___________

oxygen, carbon, hydrogen, and nitrogen