Q: Which of the following equations best represents the relationship between stimulus, receptor, control center, and effector in a feedback system?

$$\text{Stimulus} \rightarrow \text{Receptor} \rightarrow \text{Control Center} \rightarrow \text{Effector} \rightarrow \text{Response}$$

Question 1

Which of the following best describes the role of the control center in a homeostatic feedback system?

Accepted Answer

It determines the set point for a variable and analyzes input to decide the appropriate response.

Question 2

A patient presents with pain in the right lower quadrant (RLQ) of the abdomen. Which organ is most likely involved?

Accepted Answer

Appendix

Question 3

Which of the following is an example of a negative feedback mechanism in the human body?

Accepted Answer

Secretion of insulin in response to elevated blood glucose levels

Question 4

What is the primary difference between intracellular fluid (ICF) and extracellular fluid (ECF)?

Accepted Answer

ICF is the fluid inside cells, while ECF is the fluid outside cells, including plasma and interstitial fluid.

Question 5

During a fever, the set point for body temperature is altered. What is the physiological benefit of this change?

Accepted Answer

It inhibits the proliferation of some pathogens, aiding the immune response.

Question 6

Which abdominal region contains the urinary bladder?

Accepted Answer

Hypogastric region

Question 7

A home heating system is used as an analogy for negative feedback in the body. In this analogy, what does the thermostat represent?

Accepted Answer

Control center

Question 8

Which of the following best describes positive feedback mechanisms?

Accepted Answer

They enhance the original stimulus, causing the variable to change in the same direction.

Question 9

Which of the following is an example of feedforward regulation?

Accepted Answer

Stomach acid production triggered by the smell of food before eating

Question 10

If the plasma glucose concentration is $$5.5\ \mathrm{mmol/L}$$ and after eating it rises to $$8.0\ \mathrm{mmol/L}$$, which hormone is primarily responsible for restoring homeostasis?

Accepted Answer

Insulin

Question 11

Which abdominal region is located lateral to the umbilical region and contains the ascending colon of the large intestine?

Accepted Answer

Right lumbar region

Question 12

Which of the following statements about homeostatic imbalance is correct?

Accepted Answer

Homeostatic imbalance can result from aging or pathological conditions where feedback mechanisms fail.

Question 13

Which of the following is NOT a component of extracellular fluid (ECF)?

Accepted Answer

Intracellular fluid

Question 14

A patient is experiencing rapid, powerful uterine contractions during labor. Which feedback mechanism is responsible for this process?

Accepted Answer

Positive feedback

Question 15

Which abdominal region contains the spleen?

Accepted Answer

Left hypochondriac region

Question 16

Which of the following best explains why homeostasis is essential for survival?

Accepted Answer

It maintains stable internal conditions necessary for cellular function despite external changes.

Question 17

Which of the following equations best represents the relationship between stimulus, receptor, control center, and effector in a feedback system?

Accepted Answer

$$	ext{Stimulus} ightarrow 	ext{Receptor} ightarrow 	ext{Control Center} ightarrow 	ext{Effector} ightarrow 	ext{Response}$$

Question 18

Which abdominal region is most likely to be affected in a patient with a descending colon tumor?

Accepted Answer

Left lumbar region

Question 19

Which of the following best describes pathophysiology?

Accepted Answer

The study of altered health and the mechanisms underlying disease.

Question 20

A patient is exposed to cold weather, and temperature-sensitive nerve cells in the skin detect the change before the body temperature falls. What type of regulation is this?

Accepted Answer

Feedforward regulation

Introduction to Anatomy & Physiology: Abdominopelvic Regions, Life Processes, and Homeostasis

Study Guide - Practice Questions

Study Guide - Flashcards