Homeostasis and Feedback

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A thermostat is an example of what kind of feedback?

Negative

The response of the effector is to lessen or end the original stimulus

Negative feedback

This is the "normal" value for a specific body condition

Set Point

Homeostasis is the condition in which the body maintains:

A relatively stable internal environment, within limits

Homeostasis is

A state of balance in which the body's internal environment remains in the normal range.

Which way does an afferent pathway lead?

Away from the receptor Towards the control center

Effectors

Cause responses that alter conditions in the internal environment.

Positive Feedback

Changes cause additional similar changes.

In a feedback loop, what would the brain be an example of?

Control center

In a feedback loop, what would the central nervous system be an example of?

Control center

In a feedback loop, what would the hypothalamus be an example of?

Control center

In a feedback loop, what would the spinal cord be an example of?

Control center

In the hypothalamus, this area contains a set point and analyzes information to decide what should be done in response to a stimulus

Control center

This area contains a set point and analyzes information to decide what should be done in response to a stimulus

Control center

Is homeostasis a static state or a dynamic state (within limits)?

Dynamic, within limits

In a feedback loop, what would glands be an example of?

Effectors

In a feedback loop, what would muscles be an example of?

Effectors

Negative Feedback

Maintains homeostasis (ex: thirst, respiration, body temperature)

Homeostatic Mechanisms do what?

Monitor aspects of the internal environment and corrects any changes.

What are the two types of effectors?

Muscles and glands

Increasing amounts of calcium in the blood causes more bone to be produced, decreasing the amounts of calcium in the blood. + or - feedback?

Negative

Increasing amounts of fluids in the blood causes more urine to be produced, decreasing the amounts of fluids in the blood. + or - feedback?

Negative

Shivering when you are cold is an example of _____feedback

Negative

Shivering when you are cold is an example of what kind of feedback?

Negative

Sweating when you are warm is an example of _____feedback

Negative

Sweating when you are warm is an example of what kind of feedback?

Negative

What kind of feedback lessens or ends the stimulus?

Negative

______feedback mechanisms keep changes within the body rather small.

Negative

______feedback mechanisms work to prevent sudden severe changes in the body.

Negative

The response of the effector is to lessen or end the original stimulus in:

Negative feedback

Blood clotting is an example of ___ feedback

Positive

Blood clotting is an example of what kind of feedback?

Positive

Immune response is an example of ___ feedback

Positive

The birth of a baby is an example of what kind of feedback?

Positive

The increased stretch of the uterus forces it to contract, which causes more stretch. Positive or negative feedback?

Positive

What kind of feedback enhances the original stimulus or magnifies the change?

Positive

What kind of feedback usually damages the body (except two cases)?

Positive

the increased stretch of the uterus forces it to contract, which causes more stretch. Positive or negative feedback?

Positive

Receptors

Provide information about specific conditions (stimuli) in the internal environment.

What are the five components of a feedback loop?

RACEE- (sensory)receptor, afferent pathway, control center, efferent pathway, effector

In a feedback loop, what would the eye be an example of?

Sensory receptor

In a feedback loop, what would the nose be an example of?

Sensory receptor

In a feedback loop, what would touch and temperature sensors of the skin be an example of?

Sensory receptors

The hypothalamus contains these for many body functions.

Set point

Set Point

Tells what a particular value should be.

Which way does an efferent pathway lead?

Towards the effector Away from the control center

Which type of pathway leads away from a sensory receptor?

afferent

Which type of pathway leads towards a control center?

afferent

Which type of pathway leads away from a control center?

efferent

Which type of pathway leads towards an effector?

efferent

What are some examples of sensory receptors?

eye, ear, tongue, nose, touch and temperature receptors in the skin


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