Question 1

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

Accepted Answer

It monitors changes in a controlled condition and sends input to the control center.

Question 2

A patient is experiencing a rapid drop in blood pressure. Which sequence correctly describes the negative feedback response?

Accepted Answer

Baroreceptors detect the drop, send signals to the brain, which increases heart rate and constricts blood vessels.

Question 3

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

Accepted Answer

Amplification of uterine contractions during childbirth by oxytocin.

Question 4

Which equation best represents the relationship between osmotic pressure ($$\Pi$$), solute concentration ($$C$$), gas constant ($$R$$), and temperature ($$T) in $$body fluids?

Accepted Answer

$$\Pi = CRT$$

Question 5

Which of the following bones is classified as a short bone?

Accepted Answer

Carpal

Question 6

A person begins to sweat before their body temperature rises during exercise. This is an example of which type of control system?

Accepted Answer

Feed forward control

Question 7

Which of the following is NOT a function of long bones?

Accepted Answer

Protecting internal organs

Question 8

If the concentration of hydrogen ions ($$[H^+]) in a $$cell increases, what is the likely effect on intracellular pH?

Accepted Answer

Intracellular pH decreases

Question 9

Which of the following best describes the function of sesamoid bones?

Accepted Answer

They protect tendons from excessive wear and act as pulleys.

Question 10

A patient with a damaged hypothalamus is likely to have difficulty with which aspect of homeostasis?

Accepted Answer

Generating output commands for effectors

Question 11

Which of the following is a correct sequence for a negative feedback loop?

Accepted Answer

Receptor → Control Center → Effector

Question 12

Which of the following is a flat bone?

Accepted Answer

Scapula

Question 13

Which of the following best explains why positive feedback is less common than negative feedback in physiological systems?

Accepted Answer

Positive feedback leads to instability and can be dangerous if not interrupted.

Question 14

Which of the following is an example of a controlled variable in a feedback system?

Accepted Answer

Blood glucose level

Question 15

Which of the following bones is classified as irregular?

Accepted Answer

Vertebra

Question 16

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

Accepted Answer

It sets the range of values for a controlled condition and generates output commands.

Question 17

Which of the following scenarios best illustrates a feed forward control mechanism?

Accepted Answer

Heart rate increases in anticipation of exercise.

Question 18

Which of the following is a function of short bones?

Accepted Answer

Providing stability and allowing for limited movement

Question 19

Which of the following best describes the effect of negative feedback on a physiological variable?

Accepted Answer

It reverses the deviation and restores the variable to its set point.

Question 20

Which hormone is released from the pancreas in response to low blood glucose concentration?

Accepted Answer

Glucagon

Homeostasis, Feedback Systems, and Types of Bones: Core Concepts in Anatomy & Physiology

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