What is measured by the pH scale?

Concentration of hydrogen ions in a solution.

What occurs to form a covalent bond?

Atoms share one or more pairs of electrons.

What building blocks form triglycerides?

Three fatty acids and one glycerol.

What group of elements accounts for more than 95% of the human body by weight?

Carbon, hydrogen, oxygen, nitrogen.

What is the role of oxygen in the body?

Used to release energy from nutrient molecules.

The atomic number of an atom equals the number of__________, and the mass number equals the__________.

number of protons; number of protons plus neutrons

Why is a complete atom considered to be electrically neutral?

Because the number of electrons is greater than the number of protons.

What are nucleic acids?

Molecules comprised of nucleotides.

How does one isotope of a particular element differ from another of the same element?

The isotopes have different mass numbers.

Chemistry is the branch of science that studies__________.

the composition, properties, and interactions of matter

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A&P Week 3

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Questions 15

Answers

1
A solution that contains equal numbers of hydrogen ions and hydroxide ions is described as being__________.
acidic
basic
alkaline
neutral
2
What is measured by the pH scale?
Concentration of hydrogen ions in a solution.
Strength of an electrical current that a solution can carry.
Concentration of salts dissolved in a solution.
Concentration of hydroxide ions in a solution.
3
What occurs to form a covalent bond?
Atoms share one or more pairs of electrons.
Oppositely charged atoms are attracted to one another.
Like-charged atoms repel each other.
One atom loses electrons and another atom gains electrons.
4
What building blocks form triglycerides?
Three glucose molecules.
Three glycerol groups and one fatty acid.
Three fatty acids and one glycerol.
Three fatty acids and three phosphate groups.
5
What group of elements accounts for more than 95% of the human body by weight?
Calcium, phosphorus, hydrogen, nitrogen.
Carbon, hydrogen, oxygen, nitrogen.
Calcium, hydrogen, oxygen, nitrogen.
Carbon, phosphorus, oxygen, hydrogen
6
What is the role of oxygen in the body?
Used to release energy from nutrient molecules.
Produced as a waste product of celluluar metabolism.
Reacts with water to form carbonic acid.
Functions as a major electrolyte
7
The atomic number of an atom equals the number of__________, and the mass number equals the__________.
number of protons; weight of all the electrons
number of protons; number of protons plus neutrons
number of neutrons plus protons; number of electrons
weight of all electrons; number of protons plus neutrons
8
Why is a complete atom considered to be electrically neutral?
Because the number of electrons equals the number of neutrons.
Because the number of electrons equals the number of protons.
Because the number of electrons is greater than the number of protons.
Because the number of protons equals the number of neutrons.
9
Matter is composed of elements which, in turn, are composed of_________
chemicals
organic molecules
inorganic molecules
atoms
10
Nucleic acids include__________.
enzymes and RNA
proteins and DNA
steroids and triglycerides
RNA and DNA
11
What are nucleic acids?
Molecules comprised of nucleotides.
Primary sources of cellular energy.
Molecules that act as enzymes.
Inorganic salts
12
How does one isotope of a particular element differ from another of the same element?
The isotopes have different mass numbers.
The isotopes have different atomic numbers.
The isotopes have different numbers of protons.
The isotopes have different numbers of electrons.
13
Chemistry is the branch of science that studies__________.
the location of organs in body cavities
the function of organs within the body
the composition, properties, and interactions of matter
the structure of the organs of the body
14
Which of the following is not an organic compound?
Cholesterol
Sodium chloride
DNA
The enzyme phosphodiesterase
15
What particles are located in the nucleus of an atom?
Protons and electrons
Neutrons, electrons, and protons
Protons and neutrons
Electrons and neutrons

A&P Week 3 Flashcards | StudBud