Feedback Systems (Loops) Flashcards Preview

SCT1 Physiology Module 1 > Feedback Systems (Loops) > Flashcards

Flashcards in Feedback Systems (Loops) Deck (23)
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1
Q

A feedback system is a cycle of events in which the internal environment is:?

A
MONITORED
\+
EVALUATED
\+
CHANGED
\+
RE-MONITORED
\+
RE-EVALUATED
2
Q

The variable being monitored in a feedback system is referred to as?

A

CONTROLLED CONDITION

3
Q

Whatever disrupts/changes the controlled condition (whether internally or externally) is referred to as what?

A

STIMULUS

4
Q

What is a structure which monitors changes in a controlled condition called?

A

SENSOR
aka
RECEPTOR

5
Q

Sensors (receptors) detect _________, __________ and ___________ changes and send information to the control centre via transmission pathways.

A
CHEMICAL
\+
ELECTRICAL
\+
MECHANICAL
6
Q

In a feedback system, the nervous and blood vessel pathways and their signaling molecules are called?

A

TRANSMISSION PATHWAYS

7
Q

Transmission pathways relay messages between?

A

SENSOR RECEPTOR - CONTROL CENTRE
+
CONTROL CENTRE - EFFECTOR

8
Q

The control centre is comprised of the __________ and ___________ systems.

A

NERVOUS
+
ENDOCRINE

9
Q

Which part of the feedback system evaluates and compares input received from the sensor/receptor against the set range?

A

CONTROL CENTRE

10
Q

The control centre determines the body’s response to the ________ in the controlled condition.

A

CHANGE

11
Q

The control centre send the commands to the _________ via the transmission pathways.

A

EFFECTOR

12
Q

The effector is the structure that ultimately produces the response to a given _________.

A

STIMULUS

13
Q

What does breaking the feedback system cycle pose the risk of?

A

PATHOLOGY/INJURY

14
Q

When the response brings the controlled condition back to normal, it is a return to what?

A

HOMEOSTASIS

15
Q

__________ systems/loops are the body’s favourite, more common type of feedback system.

A

NEGATIVE

16
Q

Negative systems/loops function to __________ changes in the internal environment.

A

REVERSE

17
Q

Positive systems/loops function to __________ changes in the internal environment.

A

STRENGHTEN

18
Q

In uncommon, inherently unstable positive systems/loops there is some mechanism that shuts down the __________.

A

RESPONSE

19
Q

Positive systems/loops strengthen change ___________ normal.

A

AWAY FROM

20
Q

Which type of system/loop is it if blood pressure becomes too high, but the system reverses what the stimuli have caused?

A

NEGATIVE

Negates the problem

21
Q

What is the adjustment of an organism to its environment called?

A

ADAPTION

22
Q

What is the adjustment of an organism to counterbalance a defect called?

A

COMPENSATION

23
Q

As we age, the ability to maintain and efficiently return to homeostasis ___________.

A

DECREASES