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BIOLOGY 2160 EXAM 1 CROUSILLAC
|ACTUAL AND 100% VERIFIED
SOLUTIONS 2026
Levels of Organization - correct-answer -Molecules -> Cells -> Tissue -> Organs ->
Organ Systems
The four major cell/ tissue types - correct-answer -Nuerons, Muscle, Epithelial,
Connective
Endocrine gland - correct-answer -Secrete molecules (hormones) directly into the
blood stream
Exocrine gland - correct-answer -Utilize a duct. secrete molecules into a body
cavity, or to the exterior of the body. i.e. stomach, salivary, sweat glands.
Nuerons - correct-answer -Specialized for sending and recieving information.
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Epithelial - correct-answer -Found on organs, glands, and lining body cavities.
Connective tissue cells - correct-answer -Characterized by very few cells and a lot
of extracellular materials.
Homeostasis - correct-answer -1. The ability to maintain a relatively stable
internal environment despite fluctuations in the external environment.
2. Deviation from homeostasis indicates disease
3. Mainly achieved from negative feedback
Negative feedback - correct-answer -1. helps return internal conditions to a set
point when they deviate too far outside of an acceptable range. The input and the
output are opposites.
Example: shivering when you get cold.
Job of negative feedback sensors, integrating center, and effectors - correct-
answer -1. Detects change and send info to the integrating center
2. Assesses change around a set point. The integrating center then sends
intructions to an effector.
3. Make the apporiate adjustments
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Regulated variable - correct-answer -Any internal condition that must be
monitored and maintained within hte system.
What are "noraml" glucose levels? - correct-answer -1. "Normal" is a relative
term, and indicates an acceptable range.
2. Can change depending on physiological state/activity, for example, right after
eating vs. right before eating
Why do people shiver when they have a fever? - correct-answer -1. Fever is a
physiological response
2. Involves changing the body temperature set point (hypothalamus)
3. Elevated set point causes heat retaining/producing physiological responses such
as vasoconstriction and shivering
4. Shivering helps make fever happen
5. Individuals with fever feel cold because set point has changed
Antagonistic effectors - correct-answer -1. Homeostasis is often maintained by
opposing effectors that move conditions in opposite directions.
2.This maintains conditions within a certain normal range, or dynamic constancy.
BIOLOGY 2160 EXAM 1 CROUSILLAC
|ACTUAL AND 100% VERIFIED
SOLUTIONS 2026
Levels of Organization - correct-answer -Molecules -> Cells -> Tissue -> Organs ->
Organ Systems
The four major cell/ tissue types - correct-answer -Nuerons, Muscle, Epithelial,
Connective
Endocrine gland - correct-answer -Secrete molecules (hormones) directly into the
blood stream
Exocrine gland - correct-answer -Utilize a duct. secrete molecules into a body
cavity, or to the exterior of the body. i.e. stomach, salivary, sweat glands.
Nuerons - correct-answer -Specialized for sending and recieving information.
,2|Page
Epithelial - correct-answer -Found on organs, glands, and lining body cavities.
Connective tissue cells - correct-answer -Characterized by very few cells and a lot
of extracellular materials.
Homeostasis - correct-answer -1. The ability to maintain a relatively stable
internal environment despite fluctuations in the external environment.
2. Deviation from homeostasis indicates disease
3. Mainly achieved from negative feedback
Negative feedback - correct-answer -1. helps return internal conditions to a set
point when they deviate too far outside of an acceptable range. The input and the
output are opposites.
Example: shivering when you get cold.
Job of negative feedback sensors, integrating center, and effectors - correct-
answer -1. Detects change and send info to the integrating center
2. Assesses change around a set point. The integrating center then sends
intructions to an effector.
3. Make the apporiate adjustments
, 3|Page
Regulated variable - correct-answer -Any internal condition that must be
monitored and maintained within hte system.
What are "noraml" glucose levels? - correct-answer -1. "Normal" is a relative
term, and indicates an acceptable range.
2. Can change depending on physiological state/activity, for example, right after
eating vs. right before eating
Why do people shiver when they have a fever? - correct-answer -1. Fever is a
physiological response
2. Involves changing the body temperature set point (hypothalamus)
3. Elevated set point causes heat retaining/producing physiological responses such
as vasoconstriction and shivering
4. Shivering helps make fever happen
5. Individuals with fever feel cold because set point has changed
Antagonistic effectors - correct-answer -1. Homeostasis is often maintained by
opposing effectors that move conditions in opposite directions.
2.This maintains conditions within a certain normal range, or dynamic constancy.
