1
BSC 215 Exam 1 Questions with Answers
(100% Correct Answers)
What is the smallest level of organization in the human body?
chemical level
tissue level
cellular level
organism level Answer: Chemical
Which of the following is NOT one of the unique characteristics of living
organisms?
reproduction
responsiveness
composed of atoms
metabolism Answer: Composed of Atoms
Which of the following is the most complex structural level of organization?
chemical level
cellular level
tissue level
organ level Answer: Organ level
,2
This figure represents a negative feedback loop that controls the temperature of
a room. What is the thermometer?
control center
regulated variable
effector
receptor Answer: Receptor
This figure represents a negative feedback loop that controls body temperature.
What is the effector in the regulatory mechanism?
body temperature
nerve cells that determine temperature is too low and activate skeletal muscle
receptors in brain cells that detect body temperature
skeletal muscle Answer: Skeletal muscle
The cellular structure that can detect stimuli and send information to the
control center is called the __________.
effector
receptor
detector
control center Answer: Receptor
, 3
During childbirth, the initial stimulus that causes the onset of uterine
contractions is followed by additional contractions that amplify the effect until
the baby is born. This is an example of a __________.
contraction gradient
positive feedback loop
negative feedback loop
disease Answer: Positive feedback
If blood pressure is too high, what should homeostatic regulation do?
Lower blood pressure back to the normal range.
There will not be any homeostatic regulation.
Increase blood pressure so it can reach the desired set point.
Maintain the elevated blood pressure until a new set point is established.
Answer: Lower BP to normal range
Intestines have many folds on their surface, and this increase in surface area
makes absorption of nutrients faster and more efficient. This is an example of
__________.
a structural gradient
the principle of complementarity of structure and function.
cell-cell communication
a negative feedback loop Answer: Structure and function
BSC 215 Exam 1 Questions with Answers
(100% Correct Answers)
What is the smallest level of organization in the human body?
chemical level
tissue level
cellular level
organism level Answer: Chemical
Which of the following is NOT one of the unique characteristics of living
organisms?
reproduction
responsiveness
composed of atoms
metabolism Answer: Composed of Atoms
Which of the following is the most complex structural level of organization?
chemical level
cellular level
tissue level
organ level Answer: Organ level
,2
This figure represents a negative feedback loop that controls the temperature of
a room. What is the thermometer?
control center
regulated variable
effector
receptor Answer: Receptor
This figure represents a negative feedback loop that controls body temperature.
What is the effector in the regulatory mechanism?
body temperature
nerve cells that determine temperature is too low and activate skeletal muscle
receptors in brain cells that detect body temperature
skeletal muscle Answer: Skeletal muscle
The cellular structure that can detect stimuli and send information to the
control center is called the __________.
effector
receptor
detector
control center Answer: Receptor
, 3
During childbirth, the initial stimulus that causes the onset of uterine
contractions is followed by additional contractions that amplify the effect until
the baby is born. This is an example of a __________.
contraction gradient
positive feedback loop
negative feedback loop
disease Answer: Positive feedback
If blood pressure is too high, what should homeostatic regulation do?
Lower blood pressure back to the normal range.
There will not be any homeostatic regulation.
Increase blood pressure so it can reach the desired set point.
Maintain the elevated blood pressure until a new set point is established.
Answer: Lower BP to normal range
Intestines have many folds on their surface, and this increase in surface area
makes absorption of nutrients faster and more efficient. This is an example of
__________.
a structural gradient
the principle of complementarity of structure and function.
cell-cell communication
a negative feedback loop Answer: Structure and function
