Free Practice Quiz Question List

1 Homeostasis and Principles of Human Physiology Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Homeostasis and Principles of Human Physiology, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

True or false: Homeostasis holds the body's internal conditions at perfectly constant values.

A
True
B
False

Written response

1 point

What term names a condition that the body monitors and adjusts?

Fill in the blank

1 point

In a feedback system, the detects a change, the evaluates the information and organizes a response, and the carries out that response.

Choose one

1 point

Which description best matches the body's internal environment?

A
The fluid inside cells only
B
The extracellular fluid surrounding cells, including interstitial fluid and blood plasma
C
Blood cells and platelets only
D
The air in the lungs and the digestive contents

Written response

1 point

What term describes a response that prepares the body for an expected demand before a regulated variable changes substantially?

Fill in the blank

1 point

After a meal, rising blood glucose stimulates release of , which promotes glucose uptake and storage to help blood glucose toward its normal range.

True or false

1 point

True or false: In negative feedback, the response reinforces the initial change in a regulated variable.

A
True
B
False

Choose all

1 point

Which conditions are identified as important regulated conditions in the body? Select all correct answers.

A
Body temperature
B
Blood glucose
C
Water and ion concentrations
D
Blood pressure
E
Oxygen and carbon dioxide levels
F
pH
G
Hair color

Choose one

1 point

A regulated variable varies over the course of a day while the person remains healthy. Which interpretation best fits the role of its set point?

A
A regulated variable must remain at one exact value throughout the day.
B
A set point is always identical for every person and circumstance.
C
A variable can fluctuate around a reference value or range, and that reference may vary with circumstances.
D
The body stops regulating a variable whenever it moves away from its set point.

Choose all

1 point

Which statements accurately describe how body systems contribute to physiological regulation during exercise? Select all correct answers.

A
The nervous and endocrine systems help adjust heart function and blood-vessel tone.
B
The cardiovascular system redistributes blood.
C
The respiratory system increases gas exchange.
D
The kidneys help regulate water, electrolytes, and acid–base balance over longer periods.
E
The kidneys provide the immediate increase in gas exchange during exercise.
F
The digestive system directly redistributes blood to working tissues.

Choose one

1 point

Which statement best compares nervous and endocrine signaling in physiological regulation?

A
The nervous system uses hormones in blood, while the endocrine system carries signals through neurons.
B
The nervous system often signals rapidly through neurons, while endocrine hormones travel in blood and often have longer-lasting effects.
C
Both systems communicate only through direct contact between neighboring cells.
D
Endocrine signals are always faster and shorter-lasting than nervous signals.

Choose one

1 point

During childbirth, cervical stretching promotes signals that increase uterine contractions. Stronger contractions then increase cervical stretching. Which feedback pattern does this describe?

A
The response opposes cervical stretching, reducing contractions until the process stops.
B
The response keeps contractions at one unchanging level regardless of cervical stretching.
C
The response reinforces cervical stretching and increases contractions until delivery.
D
The process is anticipatory because it begins before any change occurs.

Choose one

1 point

A regulated condition remains severely abnormal despite corrective responses. Which explanation is most consistent with the limits of homeostasis?

A
Any disturbance is fully corrected as long as the body has effectors.
B
A disturbance may exceed the body's ability to compensate if it is too large, persistent, or damaging.
C
Homeostatic responses prevent all impairment of cells and organs.
D
Only changes outside the body can overwhelm homeostatic responses.

Open ended

1 point

Blood clotting involves reinforcing steps that help build a clot at an injury site. Explain why this is an example of positive feedback and how such a process is limited.

True or false

1 point

True or false: Homeostasis keeps internal conditions perfectly constant, so regulated values do not fluctuate.

A
True
B
False

Written response

1 point

What term describes a condition that the body monitors and adjusts, such as blood pressure or temperature?

Choose one

1 point

In a feedback pathway, a structure detects a rise in a regulated variable and sends information to another part of the pathway. Which component is performing this role?

A
The effector
B
The sensor
C
The response
D
The control center

Choose one

1 point

Which description best identifies the body's internal environment that surrounds cells and transports materials between tissues?

A
Fluid inside cells and fluid inside the digestive tract
B
Blood plasma alone
C
Extracellular fluid, including interstitial fluid and blood plasma
D
Interstitial fluid alone

Choose one

1 point

After a meal, blood glucose rises and insulin is released. Which effect of insulin helps bring blood glucose back toward its normal range?

A
It promotes glucose uptake and storage, helping lower blood glucose.
B
It increases blood glucose by releasing stored fuel.
C
It reinforces the rise in blood glucose until digestion ends.
D
It prevents cells from taking up glucose.

Written response

1 point

What is the term for regulation that prepares the body for an expected demand before a regulated variable changes substantially?