Homeostasis Flashcards

1
Q

Homeostasis is the body’s ability to maintain _____.

A

a relatively stable internal condition

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2
Q

What is the term used for body conditions, such as temperature and blood pressure, that must remain within a narrow range and also can change?

A

Variable

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3
Q

The control centre compares input from a receptor with the ideal normal value for a condition. This ideal normal value is known as the ______.

A

set point

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4
Q

Negative feedback is a mechanism that ______.

A

reverses the change and maintains homeostasis

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5
Q

What portion of a feedback mechanism carries out a response to change a body variable?

A

Effector

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6
Q

The tendency of a living body to maintain relatively stable internal conditions in spite of greater changes in its external environment is known as ______.

A

homeostasis

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7
Q

Identify the function of the control centre within a feedback mechanism.

A

Receives and processes information

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8
Q

In a feedback mechanism a stimulus is detected by a(n) ______.

A

receptor

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9
Q

The part of the feedback mechanism that receives and processes information, relates it to other information, and makes a decision of action to be carried out by the effector is the ______.

A

control centre

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10
Q

Sweating in response to an increase in body temperature is part of a __ feedback mechanism to lower body temperature.

A

negative

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11
Q

Baroreceptors in the aorta detect an increase in blood pressure. Nerves send information to the brain. The brain compares the value of the blood pressure to a set point. Nerves send information to the heart. The heart beats slower. Blood pressure decreases. In this example the effector is the ______.

A

heart

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12
Q

A structure, molecule or cell that detects a stimulus (or change in body variable) is called a(n)

A

receptor or receptors

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13
Q

True or false: During some situations, there are beneficial deviations from body set points.

A

True
Reason: This statement is true. Sometimes deviations are beneficial, such as the changes in heart rate and blood pressure seen in exercise.

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