1|Page
SCI 221 Final exam 2026/2027 Actual Complete Real
Verified Exam Questions & Correct Answers (Verified
Answers) | Already Graded A+ | Newest Exam!!!
The concept that information may flow ahead to another
process to trigger a change in anticipation of an event that
will follow is called - Answer-feed-forward.
Processes for maintaining or restoring homeostasis are
known as - Answer-homeostatic control mechanisms.
Homeostatic Control Mechanisms - Answer-receptor,
control center, effector
What term describes a signal traveling toward a particular
center or point of reference? - Answer-afferent
Effectors can be described as - Answer-organs that
directly influence controlled physiological variables.
Many complex processes of the body are coordinated at
many levels. These include - Answer-intracellular, intrinsic
and extrinsic
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Which level of control operates at the cell level, often
using genes and enzymes to regulate cell function? -
Answer-intracellular regulation
To accomplish self-regulation, a highly complex and
integrated communication control system or network is
required. This type of network is called a(n) - Answer-
feedback control loop.
Local control or _____, intrinsic mechanisms often make
use of chemical signals. - Answer-autoregulation
The impact of effector activity on sensors may be positive
or negative. Therefore, homeostatic control mechanisms
are categorized as - Answer-organs that are directly
influenced by physiological variables or mechanisms.
The normal reading or range is called the - Answer-set
point.
Events that lead to an immune response to an infection or
the formation of a blood clot are examples of - Answer-
positive feedback
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The relatively constant state maintained by the body is
known as - Answer-homeostasis.
The body naturally changes some set points to different
values at different times of the day. These daily cyles are
called - Answer-circadian cycles.
Because negative feedback control systems oppose
changes that are opposite in direction to the initial
disturbance, they are - Answer-slowed or maintained in
the homeostatic range.
Of the 11 major body systems, which is the least involved
in maintaining homeostasis? - Answer-Reproductive
If the secretion of oxytocin during childbirth operated as a
negative-feedback control loop, what effect would it have
on uterine contractions? - Answer-Oxytocin would inhibit
uterine contractions.
Which of the following is not one of the basic components
in a feedback control loop? - Answer-Transmitter
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Homeostasis can best be described as: - Answer-a state
of relative constancy
Epidemiology is the study of the _____ of diseases in
human populations. - Answer-occurrence, distribution,
transmission
intrinsic control - Answer-is sometimes called
autoregulation
Which of the following is a protein substance with no DNA
or RNA and is thought to be the cause of mad cow
disease? - Answer-Prion
Which of the following may put one at risk for developing a
given disease? - Answer-Environment, stress ,lifestyle
The term that literally means self-immunity is: - Answer-
autoimmunity.
SCI 221 Final exam 2026/2027 Actual Complete Real
Verified Exam Questions & Correct Answers (Verified
Answers) | Already Graded A+ | Newest Exam!!!
The concept that information may flow ahead to another
process to trigger a change in anticipation of an event that
will follow is called - Answer-feed-forward.
Processes for maintaining or restoring homeostasis are
known as - Answer-homeostatic control mechanisms.
Homeostatic Control Mechanisms - Answer-receptor,
control center, effector
What term describes a signal traveling toward a particular
center or point of reference? - Answer-afferent
Effectors can be described as - Answer-organs that
directly influence controlled physiological variables.
Many complex processes of the body are coordinated at
many levels. These include - Answer-intracellular, intrinsic
and extrinsic
,2|Page
Which level of control operates at the cell level, often
using genes and enzymes to regulate cell function? -
Answer-intracellular regulation
To accomplish self-regulation, a highly complex and
integrated communication control system or network is
required. This type of network is called a(n) - Answer-
feedback control loop.
Local control or _____, intrinsic mechanisms often make
use of chemical signals. - Answer-autoregulation
The impact of effector activity on sensors may be positive
or negative. Therefore, homeostatic control mechanisms
are categorized as - Answer-organs that are directly
influenced by physiological variables or mechanisms.
The normal reading or range is called the - Answer-set
point.
Events that lead to an immune response to an infection or
the formation of a blood clot are examples of - Answer-
positive feedback
,3|Page
The relatively constant state maintained by the body is
known as - Answer-homeostasis.
The body naturally changes some set points to different
values at different times of the day. These daily cyles are
called - Answer-circadian cycles.
Because negative feedback control systems oppose
changes that are opposite in direction to the initial
disturbance, they are - Answer-slowed or maintained in
the homeostatic range.
Of the 11 major body systems, which is the least involved
in maintaining homeostasis? - Answer-Reproductive
If the secretion of oxytocin during childbirth operated as a
negative-feedback control loop, what effect would it have
on uterine contractions? - Answer-Oxytocin would inhibit
uterine contractions.
Which of the following is not one of the basic components
in a feedback control loop? - Answer-Transmitter
, 4|Page
Homeostasis can best be described as: - Answer-a state
of relative constancy
Epidemiology is the study of the _____ of diseases in
human populations. - Answer-occurrence, distribution,
transmission
intrinsic control - Answer-is sometimes called
autoregulation
Which of the following is a protein substance with no DNA
or RNA and is thought to be the cause of mad cow
disease? - Answer-Prion
Which of the following may put one at risk for developing a
given disease? - Answer-Environment, stress ,lifestyle
The term that literally means self-immunity is: - Answer-
autoimmunity.
