Q: A person eats a large meal, causing blood glucose to rise. Which formula best represents the negative feedback response?

$\text{High glucose} \rightarrow \text{Insulin release} \rightarrow \text{Glucose uptake} \rightarrow \text{Lower glucose}$

Question 1

Which of the following best describes the concept of homeostasis in the human body?

Accepted Answer

The process by which the body maintains a constant internal environment despite changes in the external environment.

Question 2

Which of the following is NOT considered a necessary life function?

Accepted Answer

Photosynthesis

Question 3

A patient’s blood pH drops from 7.4 to 7.0. Which homeostatic mechanism is most likely to respond to restore normal pH?

Accepted Answer

Negative feedback

Question 4

Which of the following is an example of positive feedback in the human body?

Accepted Answer

Uterine contractions during childbirth intensifying until delivery

Question 5

If the set point for blood glucose is $90\ \mathrm{mg}$ per $100\ \mathrm{mL}$ blood, what would be the most likely response if blood glucose rises to $120\ \mathrm{mg}$ per $100\ \mathrm{mL}$?

Accepted Answer

Insulin secretion increases to lower blood glucose via negative feedback.

Question 6

Which component of a homeostatic control system is responsible for detecting changes in a regulated variable?

Accepted Answer

Receptor

Question 7

A person suffers a severe burn that damages the skin. Which necessary life function is most directly compromised?

Accepted Answer

Maintenance of boundaries

Question 8

Which of the following best illustrates the role of the control center in homeostasis?

Accepted Answer

Processing information from receptors and determining the appropriate response

Question 9

Why does positive feedback NOT maintain homeostasis?

Accepted Answer

It amplifies changes rather than counteracting them, leading to a major event.

Question 10

Which of the following is a real-life example of negative feedback?

Accepted Answer

Sweating to cool the body when overheated

Question 11

If a person’s internal temperature rises above $37\ ^\circ\mathrm{C}$, which sequence best describes the homeostatic response?

Accepted Answer

Receptors detect the change, control center processes information, effectors (sweat glands) respond to lower temperature.

Question 12

Which of the following statements about homeostatic imbalance is correct?

Accepted Answer

It can lead to disease as control systems become less efficient with age.

Question 13

Which system is primarily responsible for sending rapid messages to organs to maintain homeostasis?

Accepted Answer

Nervous system

Question 14

A person eats a large meal, causing blood glucose to rise. Which formula best represents the negative feedback response?

Accepted Answer

$	ext{High glucose} ightarrow 	ext{Insulin release} ightarrow 	ext{Glucose uptake} ightarrow 	ext{Lower glucose}$

Question 15

Which of the following best explains why maintaining boundaries is essential for life?

Accepted Answer

It prevents the loss of essential substances and entry of harmful substances.

Question 16

Which of the following is the correct order of events in a homeostatic control system?

Accepted Answer

Variable change → Receptor detects → Control center processes → Effector responds

Question 17

Which of the following would most likely result from a failure of the excretion life function?

Accepted Answer

Accumulation of metabolic wastes leading to toxicity

Question 18

Which of the following best describes the relationship between metabolism and homeostasis?

Accepted Answer

Metabolism provides the chemical reactions necessary to maintain homeostasis.

Question 19

A patient with diabetes has a blood glucose concentration of $180\ \mathrm{mg}$ per $100\ \mathrm{mL}$ blood. Which homeostatic process is failing?

Accepted Answer

Negative feedback regulation of blood glucose

Question 20

Which of the following is most likely to occur as a result of aging and homeostatic imbalance?

Accepted Answer

Increased susceptibility to disease

An Introduction to Homeostasis: Essential Concepts in Anatomy & Physiology

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