Bio 23 - Anatomy & Physiology 1 -
Lecture Exam #1 Questions and
Correct Answers.
Which of the following lists the structural hierarchy of life from the smallest to the largest level?
- Answer organelle, cell, tissue, organ, organ system, organism
The diagram above shows a homeostatic mechanism called: - Answer positive feedback
The atomic mass of an atom is the: - Answer total number of protons and neutrons
If the atomic number of an element is 12 and its atomic mass is 25, you could conclude that this
element has: - Answer 13 neutrons, 12 protons and 12 electrons
Atomic Number - Answer # of Protons
What is homeostasis? - Answer Body's ability to detect change, activate mechanisms that
oppose it, and maintain stable conditions.
What is differentiation? - Answer The Transformation of cells with no specialized function into
cells that are committed to a particular task
What is Cellular Composition? - Answer Living matter is always compartmentalized into one or
more cells.
What is responsiveness? - Answer the body's ability to detect and respond to changes in their
environment (Stimuli)
What is organization? - Answer living things exhibit a higher level of organization than
nonliving things
Based on the structural hierarchy of life, which of the following would you expect to find the
most of in the universe? - Answer Electrons
, The formula H20 means
a. a molecule contains 1 hydrogen atom and 2 oxygen atoms.
b. a molecule contains 2 hydrogen atoms and 1 oxygen atom.
c. an atom contains 1 hydrogen molecule and 2 oxygen molecules.
d. an atom contains 2 hydrogen molecules and 1 oxygen molecule. - Answer b. A molecule
contains 2 hydrogen atoms and 1 oxygen atom.
The subatomic particles responsible for the chemical bonding between atoms are: - Answer
Electrons
octet rule - Answer States that atoms lose, gain or share electrons in order to acquire a full set
of eight valence electrons
This type of weak bond is found between water molecules and is also important for the
structure of large molecules like proteins and DNA - Answer Hydrogen
Negative ions form when - Answer atoms gain electrons
An ionic bond is formed when _____. - Answer one atom transfers an electron to another
atom
Electrolytes are substances that - Answer ionize when dissolved in water
The lower the ph number - Answer The greater the hydrogen ion concentration will be
If you dissolved HCI in water , what would happen? - Answer There would be more H+, and
the pH would be acidic
Pick the correct statement about atoms:
a) if you change the number of neutrons, then you have a different element
b)if you change the number of electrons, then you create a new isotope of the same atom
c)atoms are electrically neutral because the number of protons is equal to the number of
Lecture Exam #1 Questions and
Correct Answers.
Which of the following lists the structural hierarchy of life from the smallest to the largest level?
- Answer organelle, cell, tissue, organ, organ system, organism
The diagram above shows a homeostatic mechanism called: - Answer positive feedback
The atomic mass of an atom is the: - Answer total number of protons and neutrons
If the atomic number of an element is 12 and its atomic mass is 25, you could conclude that this
element has: - Answer 13 neutrons, 12 protons and 12 electrons
Atomic Number - Answer # of Protons
What is homeostasis? - Answer Body's ability to detect change, activate mechanisms that
oppose it, and maintain stable conditions.
What is differentiation? - Answer The Transformation of cells with no specialized function into
cells that are committed to a particular task
What is Cellular Composition? - Answer Living matter is always compartmentalized into one or
more cells.
What is responsiveness? - Answer the body's ability to detect and respond to changes in their
environment (Stimuli)
What is organization? - Answer living things exhibit a higher level of organization than
nonliving things
Based on the structural hierarchy of life, which of the following would you expect to find the
most of in the universe? - Answer Electrons
, The formula H20 means
a. a molecule contains 1 hydrogen atom and 2 oxygen atoms.
b. a molecule contains 2 hydrogen atoms and 1 oxygen atom.
c. an atom contains 1 hydrogen molecule and 2 oxygen molecules.
d. an atom contains 2 hydrogen molecules and 1 oxygen molecule. - Answer b. A molecule
contains 2 hydrogen atoms and 1 oxygen atom.
The subatomic particles responsible for the chemical bonding between atoms are: - Answer
Electrons
octet rule - Answer States that atoms lose, gain or share electrons in order to acquire a full set
of eight valence electrons
This type of weak bond is found between water molecules and is also important for the
structure of large molecules like proteins and DNA - Answer Hydrogen
Negative ions form when - Answer atoms gain electrons
An ionic bond is formed when _____. - Answer one atom transfers an electron to another
atom
Electrolytes are substances that - Answer ionize when dissolved in water
The lower the ph number - Answer The greater the hydrogen ion concentration will be
If you dissolved HCI in water , what would happen? - Answer There would be more H+, and
the pH would be acidic
Pick the correct statement about atoms:
a) if you change the number of neutrons, then you have a different element
b)if you change the number of electrons, then you create a new isotope of the same atom
c)atoms are electrically neutral because the number of protons is equal to the number of
