SCI 221 EXAM QUESTIONS AND ANSWERS
LATEST UPDATE
Processes for maintaining or restoring homeostasis are known as
A. sensor mechanisms.
B. integrating mechanisms.
C. set point mechanisms.
D. homeostatic control mechanisms.
D. homeostatic control mechanisms.
Which of the following is a basic component of every feedback control loop?
A. sensor mechanism
B. integrating center
C. effector
D.feedback
E All of these are components of a feedback control loop.
E All of these are components of a feedback control loop.
The impact of effector activity on sensors may be positive or negative. Therefore,
homeostatic control mechanisms are categorized as
A. neutral feedback systems.
B. organs that are directly influenced by physiological variables or mechanisms.
C. active or passive feedback systems.
D. intracellular or extracellular control mechanisms.
B. organs that are directly influenced by physiological variables or mechanisms.
Extrinsic control usually involves which mode of regulation?
A. nervous
B. endocrine
C. integration
D. Both A and B are correct.
D. Both A and B are correct.
Local control or _____, intrinsic mechanisms often make use of chemical signals.
A. structural
B. developmental
C. autoregulation
D. autonomous
C. autoregulation
The relatively constant state maintained by the body is known as
A. anatomy.
B. physiology.
C. metabolism.
D. homeostasis.
D. homeostasis.
To accomplish self-regulation, a highly complex and integrated communication
control system or network is required. This type of network is called a(n)
, A. effector control loop.
B. internal environmental control loop.
C. feedback control loop.
D. cyclical control loop.
C. feedback control loop.
The concept that information may flow ahead to another process to trigger a
change in anticipation of an event that will follow is called
A. integration-forward.
B. control-forward.
C. feed-forward.
D. homeostasis.
C. feed-forward.
Many complex processes of the body are coordinated at many levels. These
include
A. intracellular.
B. intrinsic.
C. extrinsic.
D. All of these are correct.
D. All of these are correct.
The body naturally changes some set points to different values at different times
of the day. These daily cyles are called
A. circadian cycles.
B. set point cycles.
C. physiological cycles.
D. feedback cycles.
A. circadian cycles.
Events that lead to an immune response to an infection or the formation of a
blood clot are examples of
A. positive feedback.
B. negative feedback.
C. inhibitory feedback.
D. intracellular control.
A. positive feedback.
Which level of control operates at the cell level, often using genes and enzymes
to regulate cell function?
A. intrinsic regulation
B. extrinsic regulation
C. extracellular regulation
D. intracellular regulation
D. intracellular regulation
What term describes a signal traveling toward a particular center or point of
reference?
A. efferent
B. sensory
C. effector
D. afferent
LATEST UPDATE
Processes for maintaining or restoring homeostasis are known as
A. sensor mechanisms.
B. integrating mechanisms.
C. set point mechanisms.
D. homeostatic control mechanisms.
D. homeostatic control mechanisms.
Which of the following is a basic component of every feedback control loop?
A. sensor mechanism
B. integrating center
C. effector
D.feedback
E All of these are components of a feedback control loop.
E All of these are components of a feedback control loop.
The impact of effector activity on sensors may be positive or negative. Therefore,
homeostatic control mechanisms are categorized as
A. neutral feedback systems.
B. organs that are directly influenced by physiological variables or mechanisms.
C. active or passive feedback systems.
D. intracellular or extracellular control mechanisms.
B. organs that are directly influenced by physiological variables or mechanisms.
Extrinsic control usually involves which mode of regulation?
A. nervous
B. endocrine
C. integration
D. Both A and B are correct.
D. Both A and B are correct.
Local control or _____, intrinsic mechanisms often make use of chemical signals.
A. structural
B. developmental
C. autoregulation
D. autonomous
C. autoregulation
The relatively constant state maintained by the body is known as
A. anatomy.
B. physiology.
C. metabolism.
D. homeostasis.
D. homeostasis.
To accomplish self-regulation, a highly complex and integrated communication
control system or network is required. This type of network is called a(n)
, A. effector control loop.
B. internal environmental control loop.
C. feedback control loop.
D. cyclical control loop.
C. feedback control loop.
The concept that information may flow ahead to another process to trigger a
change in anticipation of an event that will follow is called
A. integration-forward.
B. control-forward.
C. feed-forward.
D. homeostasis.
C. feed-forward.
Many complex processes of the body are coordinated at many levels. These
include
A. intracellular.
B. intrinsic.
C. extrinsic.
D. All of these are correct.
D. All of these are correct.
The body naturally changes some set points to different values at different times
of the day. These daily cyles are called
A. circadian cycles.
B. set point cycles.
C. physiological cycles.
D. feedback cycles.
A. circadian cycles.
Events that lead to an immune response to an infection or the formation of a
blood clot are examples of
A. positive feedback.
B. negative feedback.
C. inhibitory feedback.
D. intracellular control.
A. positive feedback.
Which level of control operates at the cell level, often using genes and enzymes
to regulate cell function?
A. intrinsic regulation
B. extrinsic regulation
C. extracellular regulation
D. intracellular regulation
D. intracellular regulation
What term describes a signal traveling toward a particular center or point of
reference?
A. efferent
B. sensory
C. effector
D. afferent
