Biology 121 A&P Exam 1 UPDATED Exam
Questions and CORRECT Answers
characteristics of living organisms: - CORRECT ANSWER - composed of cells, complex
structural arrangement, detect/respond to stimuli, maintain a relatively stable internal
environment, organisms grow and develop, offspring are produced by reproduction, have
metabolism
Anatomy: - CORRECT ANSWER - to cut apart, study of structures of the body
Physiology is the study of - CORRECT ANSWER - how the body functions and how
organisms perform vital functions
What are the levels of organization from smallest to biggest? - CORRECT ANSWER -
chemical, cellular, tissue, organ, organ system, organism
What is homeostasis? - CORRECT ANSWER - process by which organisms maintain a
relatively stable internal environment
What is negative feedback? - CORRECT ANSWER - A response to a change in the body
that counteracts or opposes the initial change.
What is positive feedback? - CORRECT ANSWER - Feedback that increases the output of
a process.
An example of negative feedback: - CORRECT ANSWER - control of body temperature
by sweating
An example of positive feedback: - CORRECT ANSWER - childbirth
, What are the three main body cavities of the body? - CORRECT ANSWER - thoracic,
abdominal, and pelvic
Atomic structure - CORRECT ANSWER - The atom consists of three component parts:
Protons, Neutrons, and Electrons.
Chemical bonds - CORRECT ANSWER - the attractive forces that hold atoms together;
most common are ionic and covalent bonds
anabolism - CORRECT ANSWER - small, simple molecules are built up into larger, more
complex ones; gluconeogenesis is an example
catabolism - CORRECT ANSWER - Large, complex molecules in the body are broken
down into smaller, simple ones; glycosis is an example
dehydration synthesis - CORRECT ANSWER - the creation of larger molecules from
smaller monomers where a water molecule is released; formation of maltose is an example
Hydrolysis - CORRECT ANSWER - one of the bonds in a complex molecule is broken
and the components of a water molecule are added to the fragments. salt is an example
What is pH? - CORRECT ANSWER - the negative logarithm of the hydrogen io
concentration in moles per liter; 7.35-7.45 is the pH of blood
What are pH buffers? - CORRECT ANSWER - compounds that stabilize the pH of a
solution by removing or replacing hydrogen ions
What are carbohydrates? - CORRECT ANSWER - organic molecule consisting of carbon,
hydrogen, and oxygen in a 1:2:1 ratio. most important as energy sources that are catabolized
rather than stored.
Questions and CORRECT Answers
characteristics of living organisms: - CORRECT ANSWER - composed of cells, complex
structural arrangement, detect/respond to stimuli, maintain a relatively stable internal
environment, organisms grow and develop, offspring are produced by reproduction, have
metabolism
Anatomy: - CORRECT ANSWER - to cut apart, study of structures of the body
Physiology is the study of - CORRECT ANSWER - how the body functions and how
organisms perform vital functions
What are the levels of organization from smallest to biggest? - CORRECT ANSWER -
chemical, cellular, tissue, organ, organ system, organism
What is homeostasis? - CORRECT ANSWER - process by which organisms maintain a
relatively stable internal environment
What is negative feedback? - CORRECT ANSWER - A response to a change in the body
that counteracts or opposes the initial change.
What is positive feedback? - CORRECT ANSWER - Feedback that increases the output of
a process.
An example of negative feedback: - CORRECT ANSWER - control of body temperature
by sweating
An example of positive feedback: - CORRECT ANSWER - childbirth
, What are the three main body cavities of the body? - CORRECT ANSWER - thoracic,
abdominal, and pelvic
Atomic structure - CORRECT ANSWER - The atom consists of three component parts:
Protons, Neutrons, and Electrons.
Chemical bonds - CORRECT ANSWER - the attractive forces that hold atoms together;
most common are ionic and covalent bonds
anabolism - CORRECT ANSWER - small, simple molecules are built up into larger, more
complex ones; gluconeogenesis is an example
catabolism - CORRECT ANSWER - Large, complex molecules in the body are broken
down into smaller, simple ones; glycosis is an example
dehydration synthesis - CORRECT ANSWER - the creation of larger molecules from
smaller monomers where a water molecule is released; formation of maltose is an example
Hydrolysis - CORRECT ANSWER - one of the bonds in a complex molecule is broken
and the components of a water molecule are added to the fragments. salt is an example
What is pH? - CORRECT ANSWER - the negative logarithm of the hydrogen io
concentration in moles per liter; 7.35-7.45 is the pH of blood
What are pH buffers? - CORRECT ANSWER - compounds that stabilize the pH of a
solution by removing or replacing hydrogen ions
What are carbohydrates? - CORRECT ANSWER - organic molecule consisting of carbon,
hydrogen, and oxygen in a 1:2:1 ratio. most important as energy sources that are catabolized
rather than stored.
