What is the role of a receptor in helping an organism maintain homeostasis?
10 points
Receives messages sent by the control center
Carries out a response to restore internal conditions
Detects stimuli and sends information to the control center
Compares current conditions with ideal values for those conditions
2. Which of these does homeostasis most directly relate?
10 points
Stability
Evolution
Scale and structure
Interacting systems
3. Which of these is an example of a positive feedback loop?
10 points
Plants closing their stomata in response to water loss
The removal of salt from a saltwater fish during osmoregulation
The release of glucose by the liver in response to low blood sugar
Platelets stimulating the activation of more platelets during clotting
4. Internal control systems maintain homeostasis by regulating which of these?
10 points
pH of body fluids
External conditions
Receptors in the body
The body's control centers
5. On a hot day, which of these is an outward sign that thermoregulation is taking place?
10 points
Sunburn
Sweating
Dry mouth
Slow breathing
6. How does the liver help to regulate glucose levels in the blood?
10 points
By storing glucose
By producing insulin
By releasing glucagon
By excreting excess water
7. The body works to maintain homeostasis in response to what conditions?
10 points
Tissue and cell formation
Productions of key vitamins
Internal and external changes
Cell differentiation and determination
8. Which of the following are most important for an organism to maintain homeostasis?
10 points
reproduction and development
dependence on other organisms
behaviors and negative feedback
interactions with nonliving things
9. The body’s internal environment must stay __________.
10 points
exactly the same at all times
the same as its external environment
within narrow ranges that support human life
away from sudden outside temperature changes
10. The long-term effects of a disruption of homeostasis include __________.
10 points
destruction of organ systems
the immune system’s taking control
regulation of the internal environment
establishment of feedback mechanisms
what school
I think it’s B because it stated jt
1. The role of a receptor in helping an organism maintain homeostasis is to detect stimuli and send information to the control center. This allows the organism to receive messages sent by the control center and carry out a response to restore internal conditions. By comparing current conditions with ideal values for those conditions, the receptor helps the organism maintain balance and stability.
2. Homeostasis most directly relates to stability. It is the process by which an organism maintains a stable internal environment despite external changes. This stability ensures that the organism's body functions properly and optimally.
3. An example of a positive feedback loop is platelets stimulating the activation of more platelets during clotting. In this feedback loop, a stimulus (platelet activation) leads to an amplification of the response (activation of more platelets), which further enhances the original stimulus. Positive feedback loops are often involved in processes that need rapid change or escalation.
4. Internal control systems maintain homeostasis by regulating the pH of body fluids, not external conditions. They also regulate the receptors in the body and the body's control centers. By doing so, they ensure that the body's internal environment remains balanced and stable.
5. On a hot day, an outward sign that thermoregulation is taking place is sweating. Sweating helps to cool the body down by evaporating sweat from the skin's surface, thus releasing heat. This is a mechanism to maintain the body's internal temperature within an optimal range.
6. The liver helps to regulate glucose levels in the blood by storing glucose when blood sugar levels are high and releasing glucose when blood sugar levels are low. It does not produce insulin but rather releases glucagon, which helps increase blood sugar levels. Excreting excess water is not directly related to glucose regulation.
7. The body works to maintain homeostasis in response to internal and external changes. Tissue and cell formation, production of key vitamins, and cell differentiation and determination are all important processes, but they are not the primary drivers of homeostasis. Homeostasis is mainly concerned with maintaining the stability and balance of the body's internal environment.
8. Behaviors and negative feedback are most important for an organism to maintain homeostasis. Behaviors, such as seeking shade on a hot day or putting on an extra layer of clothing when it is cold, help the organism regulate its internal environment. Negative feedback mechanisms are also crucial, as they detect changes from the ideal state and trigger responses to restore the balance.
9. The body's internal environment must stay within narrow ranges that support human life. It is not necessary for it to stay exactly the same at all times, nor does it need to be the same as the external environment. However, deviations from these narrow ranges can have negative consequences on the body's functions and overall well-being.
10. The long-term effects of a disruption of homeostasis include destruction of organ systems, as the body's internal balance and functioning may be compromised. The immune system taking control is not a typical long-term effect, although it may be involved in restoring homeostasis. Regulation of the internal environment and establishment of feedback mechanisms are processes that occur during homeostasis itself, rather than long-term effects of a disruption.
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