Homeostasis - l
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Homeostasis is? | The body's attempt to maintain a constant, stable environment internally.
🗑
|
||||
| Dynamic state of equilibrium? | Necessary for survival and good health eg. temperature control.
🗑
|
||||
| What happens if there is disturbance of homeostasis? | Increased risk of disease, contributes to changes associated with ageing, may allow destructive positive feedback to take over eg. heart failure.
🗑
|
||||
| What is homeostasis constantly being disrupted by? | External and internal stimuli.
🗑
|
||||
| External stimuli? | Intense heat, cold, lack of oxygen.
🗑
|
||||
| Internal stimuli? | Psychological stresses, exercise.
🗑
|
||||
| Three control mechanisms? | Receptor (sensor), control centre, Effector.
🗑
|
||||
| Receptor? | Monitors environment and responds to stimuli.
🗑
|
||||
| Control centre? | Determines the set point at which the variable is maintain, receives input from receptor, determines appropriate response.
🗑
|
||||
| Effector? | Receives output from control centre, provides the means to respond, responds to change the controlled condition and restore homeostasis.
🗑
|
||||
| What is negative feedback? | The response that reduces or shuts off original stimulus eg. regulation of body temperature (a nervous mechanism), regulation of blood volume by ADH (an endocrine mechanism.
🗑
|
||||
| What is positive feedback? | The response enhances or exaggerates original stimulus eg pregancy - enhancement of labour contractions by oxytocin.
🗑
|
||||
| Negative feedback loop? | Reverse the stimulus - causes a reversal in controlled condition.
🗑
|
||||
| Positive feedback loop? | Enhances the stimulus - must be stopped or interrupted by something outside the system.
🗑
|
||||
| Most common feedback system? | Negative - enzyme levels, body temperature, blood sugar levels, blood pressure, heart rate.
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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
Normal Size Small Size show me how
Created by:
Leithj
Popular Anatomy sets