BIO 251
BIOS 251 Exam 1 Preparation Questions
with Answers 2025
The study of human structure - Correct Ans-Anatomy
The study of human function - Correct Ans-Physiology
A tendency for organisms to maintain a balanced or constant internal state - Correct
Ans-Homeostasis
A state of balance - Correct Ans-Equilibrium
Consequences of homeostatic imbalance - Correct Ans-Illness or death
Thermoregulation Process - Correct Ans-
A feedback loop in which a system responds to a change by reversing that change, or
by decreasing the rate at which the change is occurring. (Ex. thermoregulation) -
Correct Ans-Negative Feedback Loop
A feedback loop in which a system responds to a change by amplifying that change.
(Ex. childbirth) - Correct Ans-Positive Feedback Loop
Changes, occurring within or outside the body, that affect homeostasis - Correct Ans-
Stimuli
Detects and sends messages to the control center - Correct Ans-Receptors
Processes the signal, alerts the effector about the detected change, and gives
instructions - Correct Ans-Control Center
An organ or cell that acts in response to a stimulus; handles the issue - Correct Ans-
Effector
Divides a human body into anterior and posterior sections - Correct Ans-Frontal Plane
or Coronal Plane
Divides the human body into equal left and right sections - Correct Ans-Midsagittal
Plane
Divides the human body in half, creating two sections; top and bottom - Correct Ans-
Transverse or Horizontal Plane
Parallel plane next to the midsagittal plane - Correct Ans-Parasaggittal Plane
1|Page
BIOS 251 Exam 1 Preparation Questions
with Answers 2025
The study of human structure - Correct Ans-Anatomy
The study of human function - Correct Ans-Physiology
A tendency for organisms to maintain a balanced or constant internal state - Correct
Ans-Homeostasis
A state of balance - Correct Ans-Equilibrium
Consequences of homeostatic imbalance - Correct Ans-Illness or death
Thermoregulation Process - Correct Ans-
A feedback loop in which a system responds to a change by reversing that change, or
by decreasing the rate at which the change is occurring. (Ex. thermoregulation) -
Correct Ans-Negative Feedback Loop
A feedback loop in which a system responds to a change by amplifying that change.
(Ex. childbirth) - Correct Ans-Positive Feedback Loop
Changes, occurring within or outside the body, that affect homeostasis - Correct Ans-
Stimuli
Detects and sends messages to the control center - Correct Ans-Receptors
Processes the signal, alerts the effector about the detected change, and gives
instructions - Correct Ans-Control Center
An organ or cell that acts in response to a stimulus; handles the issue - Correct Ans-
Effector
Divides a human body into anterior and posterior sections - Correct Ans-Frontal Plane
or Coronal Plane
Divides the human body into equal left and right sections - Correct Ans-Midsagittal
Plane
Divides the human body in half, creating two sections; top and bottom - Correct Ans-
Transverse or Horizontal Plane
Parallel plane next to the midsagittal plane - Correct Ans-Parasaggittal Plane
1|Page
