BMSC 207 FINAL REVIEW QUESTIONS
Which of the following is the proper description of a set point for a homeostatically
controlled variable?
a) The normal, "desired" value of the variable
b) The factor that senses changes in the variable
c) The value that a variable reaches that results in the activation of a homeostatic
control pathway
d) The structures that will send signals about the variable to an integrating center -
Answers -a) The normal, "desired" value of the variable
As a result of exercise training, which of the following decreases?
a) Muscle mass of the ventricle
b) Bone density
c) Resting heart rate
d) All answers are incorrect - Answers -c) Resting heart rate
Which of the following is not one of Cannon's postulates describing properties of
homeostatic control systems?
a) Cellular specificity plays a role in the maintenance and achievement of homeostasis.
b) Some parameters are under tonic control, which allows the parameter to be
increased or decreased.
c) Some parameters are under antagonistic control in which, for example, one hormone
increases the parameter while a second hormone decreases it.
d) The nervous system plays an important role in maintaining homeostasis. - Answers -
a) Cellular specificity plays a role in the maintenance and achievement of homeostasis.
Cellular specificity plays a role in the maintenance and achievement of homeostasis is
not one of Cannon's postulates describing the properties of homeostatic control
systems. Although cellular specificity is important in the body's functions, it is not
considered a property of homeostatic control.
Which of the following represents the most complicated control pathway in homeostatic
systems?
a) An efferent pathway that includes an endocrine organ as an integrator
b) An efferent pathway that includes a two-neuron relay before the target cell is
stimulated
c) An integrator having an effect on multiple target tissues
d) An efferent pathway that includes a neuron, an endocrine gland functioning as an
integrator, and a target tissue
, e) An efferent pathway that consists of one neuron - Answers -d) An efferent pathway
that includes a neuron, an endocrine gland functioning as an integrator, and a target
tissue
The most complicated control pathway in homeostatic systems includes an efferent
pathway that includes a neuron, an endocrine gland functioning as an integrator, and a
target tissue. In this example there is more than one integrator that is stimulated in a
chain of signals before a final response is generated by the target tissue.
Which of the following statements is false?
a) A large percentage of living cells of the body are in direct contact with the external
environment.
b) Communication of a cell to the outside world occurs across the cell membrane.
c) Homeostasis is an important process in the body.
d) Teleological study of human physiology answers the "how" of the system.
e) Most cell-to-cell communication uses chemicals. - Answers -d) Teleological study of
human physiology answers the "how" of the system.
Teleological study of human physiology answers the "how" of the system is a false
statement. A teleological explanation answers the why of a system. For example, why
do we breath? The teleological answer to this question would be: because we need
oxygen. The how answer would be the mechanistic explanation and would explain the
steps involved with moving air into the lungs.
Which of the following statements about homeostasis is false?
a) Blood glucose regulation is not an example of homeostatic regulation.
b) Failure to maintain homeostasis may result in a pathological condition.
c) Integrating centers play a role in maintaining homeostasis.
d) Internal changes can result in loss of homeostasis. - Answers -a) Blood glucose
regulation is not an example of homeostatic regulation.
Blood glucose regulation is not an example of homeostatic regulation is a false
statement with regard to homeostasis. Blood glucose levels are controlled by negative
feedback loops. When blood glucose levels increase, the pancreas will release insulin.
Insulin is responsible for mediating glucose uptake by the liver and the tissues of the
body, which will eventually reduce blood glucose levels and bring glucose levels back to
their homeostatic set point.
Which of the following can function as integrators?
a) An endocrine cell
b) The brain
c) All answers are correct
d) An endocrine gland
Which of the following is the proper description of a set point for a homeostatically
controlled variable?
a) The normal, "desired" value of the variable
b) The factor that senses changes in the variable
c) The value that a variable reaches that results in the activation of a homeostatic
control pathway
d) The structures that will send signals about the variable to an integrating center -
Answers -a) The normal, "desired" value of the variable
As a result of exercise training, which of the following decreases?
a) Muscle mass of the ventricle
b) Bone density
c) Resting heart rate
d) All answers are incorrect - Answers -c) Resting heart rate
Which of the following is not one of Cannon's postulates describing properties of
homeostatic control systems?
a) Cellular specificity plays a role in the maintenance and achievement of homeostasis.
b) Some parameters are under tonic control, which allows the parameter to be
increased or decreased.
c) Some parameters are under antagonistic control in which, for example, one hormone
increases the parameter while a second hormone decreases it.
d) The nervous system plays an important role in maintaining homeostasis. - Answers -
a) Cellular specificity plays a role in the maintenance and achievement of homeostasis.
Cellular specificity plays a role in the maintenance and achievement of homeostasis is
not one of Cannon's postulates describing the properties of homeostatic control
systems. Although cellular specificity is important in the body's functions, it is not
considered a property of homeostatic control.
Which of the following represents the most complicated control pathway in homeostatic
systems?
a) An efferent pathway that includes an endocrine organ as an integrator
b) An efferent pathway that includes a two-neuron relay before the target cell is
stimulated
c) An integrator having an effect on multiple target tissues
d) An efferent pathway that includes a neuron, an endocrine gland functioning as an
integrator, and a target tissue
, e) An efferent pathway that consists of one neuron - Answers -d) An efferent pathway
that includes a neuron, an endocrine gland functioning as an integrator, and a target
tissue
The most complicated control pathway in homeostatic systems includes an efferent
pathway that includes a neuron, an endocrine gland functioning as an integrator, and a
target tissue. In this example there is more than one integrator that is stimulated in a
chain of signals before a final response is generated by the target tissue.
Which of the following statements is false?
a) A large percentage of living cells of the body are in direct contact with the external
environment.
b) Communication of a cell to the outside world occurs across the cell membrane.
c) Homeostasis is an important process in the body.
d) Teleological study of human physiology answers the "how" of the system.
e) Most cell-to-cell communication uses chemicals. - Answers -d) Teleological study of
human physiology answers the "how" of the system.
Teleological study of human physiology answers the "how" of the system is a false
statement. A teleological explanation answers the why of a system. For example, why
do we breath? The teleological answer to this question would be: because we need
oxygen. The how answer would be the mechanistic explanation and would explain the
steps involved with moving air into the lungs.
Which of the following statements about homeostasis is false?
a) Blood glucose regulation is not an example of homeostatic regulation.
b) Failure to maintain homeostasis may result in a pathological condition.
c) Integrating centers play a role in maintaining homeostasis.
d) Internal changes can result in loss of homeostasis. - Answers -a) Blood glucose
regulation is not an example of homeostatic regulation.
Blood glucose regulation is not an example of homeostatic regulation is a false
statement with regard to homeostasis. Blood glucose levels are controlled by negative
feedback loops. When blood glucose levels increase, the pancreas will release insulin.
Insulin is responsible for mediating glucose uptake by the liver and the tissues of the
body, which will eventually reduce blood glucose levels and bring glucose levels back to
their homeostatic set point.
Which of the following can function as integrators?
a) An endocrine cell
b) The brain
c) All answers are correct
d) An endocrine gland
