K
BIOS 255 COMPREHENSIVE
C
EXAM REVIEW QUESTIONS
LO
WITH CORRECT ANSWERS
ALL VERIFIED BY AN EXPERT
YC
A+ GRADED (LATEST UPDATE)
D
U
ST
, Homeostasis - ANS * Presence of stable internal environment
* Failure to maintain homeostasis leads to illness or death
Homeostatic Regulation - ANS Physiological adjustment to preserve homeostasis in variable
environments
Feedback - ANS Stimulation of a receptor triggers response that changes environment at that
receptor
Negative Feedback - ANS * Effector opposes or negates the original stimulus
K
* Minimizes change
* Primary mechanism of homeostatic regulation in the body
* Dynamic process: Set point varies with varying environments & activity levels
C
Negative Feedback Receptors - ANS Temperature receptors in skin & brain are stimulated &
send signals to the control center
LO
Negative Feedback Control Center - ANS The temperature control center received information
from the two sets of temperature receptors & sends commands to the effectors
Negative Feedback Effectors - ANS Sweat glands & smooth muscle in the walls of blood
YC
vessels supplying the skin respond
Positive Feedback - ANS * Stimulus produces a response that exaggerates or enhances the
original change (rather than opposing it)
* Tends to produce extreme responses
* Does not restore homeostasis
D
Positive Feedback Loop - ANS * Escalating cycle
* Typically occurs when a potentially dangerous or stressful process must be completed quickly
U
before the body can restore homeostasis
Steps of Positive Feedback in Blood Clotting - ANS 1. Damage to cells in the blood vessel wall
ST
releases chemicals that begin the process of blood clotting
2. The chemicals start chain reactions in which cells, cell fragments, & soluble proteins in the
blood begin to form a clot
3. As clotting continues, each step releases chemicals that further accelerate the process
4. This escalating process is a positive feedback loop that ends with the formation of a blood
clot, which patches the vessel wall & stops the bleeding
Epithelial Tissue - ANS * Epithelia
* Glands (Exocrine & Endocrine)
Functions of Epithelial Tissue - ANS * Provide physical protection
BIOS 255 COMPREHENSIVE
C
EXAM REVIEW QUESTIONS
LO
WITH CORRECT ANSWERS
ALL VERIFIED BY AN EXPERT
YC
A+ GRADED (LATEST UPDATE)
D
U
ST
, Homeostasis - ANS * Presence of stable internal environment
* Failure to maintain homeostasis leads to illness or death
Homeostatic Regulation - ANS Physiological adjustment to preserve homeostasis in variable
environments
Feedback - ANS Stimulation of a receptor triggers response that changes environment at that
receptor
Negative Feedback - ANS * Effector opposes or negates the original stimulus
K
* Minimizes change
* Primary mechanism of homeostatic regulation in the body
* Dynamic process: Set point varies with varying environments & activity levels
C
Negative Feedback Receptors - ANS Temperature receptors in skin & brain are stimulated &
send signals to the control center
LO
Negative Feedback Control Center - ANS The temperature control center received information
from the two sets of temperature receptors & sends commands to the effectors
Negative Feedback Effectors - ANS Sweat glands & smooth muscle in the walls of blood
YC
vessels supplying the skin respond
Positive Feedback - ANS * Stimulus produces a response that exaggerates or enhances the
original change (rather than opposing it)
* Tends to produce extreme responses
* Does not restore homeostasis
D
Positive Feedback Loop - ANS * Escalating cycle
* Typically occurs when a potentially dangerous or stressful process must be completed quickly
U
before the body can restore homeostasis
Steps of Positive Feedback in Blood Clotting - ANS 1. Damage to cells in the blood vessel wall
ST
releases chemicals that begin the process of blood clotting
2. The chemicals start chain reactions in which cells, cell fragments, & soluble proteins in the
blood begin to form a clot
3. As clotting continues, each step releases chemicals that further accelerate the process
4. This escalating process is a positive feedback loop that ends with the formation of a blood
clot, which patches the vessel wall & stops the bleeding
Epithelial Tissue - ANS * Epithelia
* Glands (Exocrine & Endocrine)
Functions of Epithelial Tissue - ANS * Provide physical protection
