01
Choose one
1 point
A group of similar cells works together to perform a function. What level of organization does this group represent, and what level is formed when several such groups work together?
Free Practice Quiz Question List
1 Foundations of Homeostasis Online Quiz Questions
Use this free practice quiz with 20 questions to review 1 Foundations of Homeostasis, test your knowledge, and prepare for your next test or exam.
20 questions
02
True or false
1 point
True or false: A body variable can fluctuate within a functional range while still being regulated homeostatically.
- A
True
- B
False
03
Written response
1 point
What term describes the body's condition when it continually adjusts internal conditions rather than remaining motionless?
04
Fill in the blank
1 point
Complete the description of extracellular fluid: the fluid that bathes most cells is , and the fluid portion of blood is .
05
Choose one
1 point
In a homeostatic pathway, a sensor detects that a regulated variable has changed. Which statement correctly describes the next control step?
- A
A receptor compares the information with a target and determines the response.
- B
A receptor detects the change, and a control center determines an appropriate response.
- C
An effector detects the change, and a receptor carries out the response.
06
Choose one
1 point
A person's body temperature rises, and the body responds by increasing sweating. Which feedback pattern best describes how sweating helps regulate temperature?
- A
The response opposes the temperature rise by increasing heat loss.
- B
The response amplifies the temperature rise until a stopping event occurs.
- C
The response begins before temperature changes and does not respond to the change.
07
Choose all
1 point
Which statements describe positive feedback? Select all that apply.
- A
It amplifies the initial change.
- B
It always reverses the initial change to restore a variable to its usual range.
- C
It can drive a process toward an endpoint that stops the loop.
- D
It is the most common pattern of homeostatic regulation.
08
Choose one
1 point
During childbirth, contractions increase pressure on the cervix, which prompts signals that increase oxytocin release. How does this sequence affect the contractions?
- A
Each contraction reduces oxytocin release, weakening the next contraction.
- B
Pressure on the cervix prompts signals that increase oxytocin release, strengthening contractions.
- C
Oxytocin weakens contractions until the cervix returns to its initial state.
09
Fill in the blank
1 point
Complete these pathway terms: the initial change in a regulated variable is the , and the part that carries out the control center's response is the .
10
Choose all
1 point
Which system-role pairings are supported by the material? Select all that apply.
- A
The respiratory system helps regulate carbon dioxide and pH.
- B
The digestive system is described as the primary regulator of blood pH through acid–base excretion.
- C
The kidneys adjust water, electrolyte, and acid–base balance.
- D
The cardiovascular system produces the hormones that regulate all blood glucose changes.
11
Open ended
1 point
Digestive activity can begin when a person sees or smells food, before eating has substantially changed internal conditions. Explain why this is feedforward regulation and how feedback may also contribute.
12
Written response
1 point
What is the name of the component that compares incoming information with a regulated target or range and determines a response?
13
Choose one
1 point
A regulated variable moves outside its functional range despite the body's responses. Which explanation is consistent with the limits of homeostatic control?
- A
The variable must remain in its usual range because set points cannot shift.
- B
Only a failure of the effector can impair regulation; receptor or communication problems cannot.
- C
An excessively large disturbance or a malfunction in a pathway component can allow the variable to leave its functional range.
- D
A single organ system always regulates each variable independently of other systems.
14
True or false
1 point
True or false: Homeostasis requires every internal condition to remain perfectly constant.
- A
True
- B
False
15
Written response
1 point
What is the fluid portion of blood called?
16
Written response
1 point
In a homeostatic control pathway, what component detects a change in a regulated variable?
17
Choose one
1 point
If carbon dioxide levels change and blood pH is affected, which organ system helps regulate both carbon dioxide and pH?
- A
Digestive system
- B
Respiratory system
- C
Skeletal system
- D
Integumentary system
18
Choose one
1 point
After a meal, blood glucose rises. Which response best illustrates negative feedback in this situation?
- A
Insulin release amplifies the rise in glucose until a stopping event occurs.
- B
Glucagon release promotes glucose storage and lowers blood glucose.
- C
Insulin release promotes glucose uptake and storage, tending to lower blood glucose.
- D
The pancreas prevents glucose from changing by stopping all hormone release.
19
Choose one
1 point
Digestive activity begins when a person smells food, before eating or a substantial change in a regulated variable. Which type of control does this best illustrate?
- A
Feedforward control, because the response begins in anticipation of a change.
- B
Negative feedback, because the response reverses a change that has already occurred.
- C
Positive feedback, because the response amplifies a change toward an endpoint.
- D
No regulation, because a regulated variable has not yet changed.
20
True or false
1 point
A tissue adjusts its activity in response to local conditions, without direction from a body-wide control center. Can this local adjustment still contribute to homeostasis?
- A
True
- B
False