BIOLOGY 2160 ACTUAL EXAM 1 CROUSILLAC |POTENTIAL
COMPLETE AND GRADED QUESTIONS AND ANSWERS 2026 LATEST
UPDATED | 100% GRADED CORRECT | 100% GUARANTEED TO PASS |
GET A+
Levels of Organization - (ANSWER)Molecules -> Cells -> Tissue -> Organs -> Organ Systems
The four major cell/ tissue types - (ANSWER)Nuerons, Muscle, Epithelial, Connective
Endocrine gland - (ANSWER)Secrete molecules (hormones) directly into the blood stream
Exocrine gland - (ANSWER)Utilize a duct. secrete molecules into a body cavity, or to the
exterior of the body. i.e. stomach, salivary, sweat glands.
Nuerons - (ANSWER)Specialized for sending and recieving information.
Epithelial - (ANSWER)Found on organs, glands, and lining body cavities.
Connective tissue cells - (ANSWER)Characterized by very few cells and a lot of extracellular
materials.
,Homeostasis - (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 - (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 - (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
Regulated variable - (ANSWER)Any internal condition that must be monitored and maintained
within hte system.
, What are "noraml" glucose levels? - (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? - (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 - (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.
3. When you are hot, you sweat; when you are cold, you shiver. These are antagonistic reactions.
How does positive feedback work? - (ANSWER)1. Moves conditions further away from a set
point. The input and the output in a positive feedback loop are the same.
COMPLETE AND GRADED QUESTIONS AND ANSWERS 2026 LATEST
UPDATED | 100% GRADED CORRECT | 100% GUARANTEED TO PASS |
GET A+
Levels of Organization - (ANSWER)Molecules -> Cells -> Tissue -> Organs -> Organ Systems
The four major cell/ tissue types - (ANSWER)Nuerons, Muscle, Epithelial, Connective
Endocrine gland - (ANSWER)Secrete molecules (hormones) directly into the blood stream
Exocrine gland - (ANSWER)Utilize a duct. secrete molecules into a body cavity, or to the
exterior of the body. i.e. stomach, salivary, sweat glands.
Nuerons - (ANSWER)Specialized for sending and recieving information.
Epithelial - (ANSWER)Found on organs, glands, and lining body cavities.
Connective tissue cells - (ANSWER)Characterized by very few cells and a lot of extracellular
materials.
,Homeostasis - (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 - (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 - (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
Regulated variable - (ANSWER)Any internal condition that must be monitored and maintained
within hte system.
, What are "noraml" glucose levels? - (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? - (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 - (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.
3. When you are hot, you sweat; when you are cold, you shiver. These are antagonistic reactions.
How does positive feedback work? - (ANSWER)1. Moves conditions further away from a set
point. The input and the output in a positive feedback loop are the same.
