Body temperature will re-main at or very near normal regardless of temperature changes that may occur in the external environment.

The relatively constant states maintained by the body

Feedback control loops

Maybe transmitted by nervous impulses or by specific chemical messengers called hormones, which are secreted into the blood.

Four basic components in every feedback control loop:

1. Sensor mechanism 2. Integrator or control center 3. Effector mechanism 4. Feedback

A signal is traveling toward a particular center or point of reference,

The signal is moving away from a center or other point of reference.

Physiological variable

Is any state or condition in the body that can change or vary.

Receives input from a homeostatic sensor

Are organs, such as muscles or glands, that directly influence controlled physiological variables

Control systems are inhibitory, they oppose or “negate” a change by creating a response that is opposite in direction to the initial disturbance

Does not operate to help the body maintain a stable, or homeostatic, condition, it is often harmful, even disastrous, to survival.

Intracellular control

Mechanisms operate at the cell level. These mechanisms regulate functions within the cell, often by means of genes and enzymes.

Mechanisms operate at the tissue and organ levels, often make use of chemical signals.

Help

Options

focusNode

Didn't know it?
click below

Knew it?
click below

Don't Know

Remaining cards (0)

Know

retry

shuffle

restart

0:00

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Christine Schermer-N

SCI221 chapter 2

Question	Answer
Internal environment	Body temperature will re-main at or very near normal regardless of temperature changes that may occur in the external environment.
Homeostasis	The relatively constant states maintained by the body
Set point	A normal reading or range
Feedback control loops	Maybe transmitted by nervous impulses or by specific chemical messengers called hormones, which are secreted into the blood.
Four basic components in every feedback control loop:	1. Sensor mechanism 2. Integrator or control center 3. Effector mechanism 4. Feedback
Afferent	A signal is traveling toward a particular center or point of reference,
Efferent	The signal is moving away from a center or other point of reference.
Physiological variable	Is any state or condition in the body that can change or vary.
Integrator	Receives input from a homeostatic sensor
Effectors	Are organs, such as muscles or glands, that directly influence controlled physiological variables
Negative feedback	Control systems are inhibitory, they oppose or “negate” a change by creating a response that is opposite in direction to the initial disturbance
Positive feedback	Does not operate to help the body maintain a stable, or homeostatic, condition, it is often harmful, even disastrous, to survival.
Intracellular control	Mechanisms operate at the cell level. These mechanisms regulate functions within the cell, often by means of genes and enzymes.
Intrinsic control	Mechanisms operate at the tissue and organ levels, often make use of chemical signals.

Created by: user-1988424

"Know" box contains:
Time elapsed:
Retries: