Skip to main content
뒤로

Homeostasis and Feedback Loops in Anatomy & Physiology

1 학생이 이 점이 도움이 되었다고 느꼈습니다
컨트롤 버튼이 '내비게이션' 모드로 변경되었습니다.
1/44

이 집합의 용어 (44)

  • Define homeostasis.

    Homeostasis is the body's ability to maintain a stable internal environment despite external changes.

  • What type of internal environment does homeostasis maintain?

    Homeostasis maintains a stable internal environment.

  • Name the two main types of feedback mechanisms controlling homeostasis.

    The two main types are negative feedback and positive feedback.

  • What is negative feedback?

    Negative feedback reverses a change to return the system to its set point.

  • What is positive feedback?

    Positive feedback amplifies a process until a specific goal is achieved.

  • What triggers a response in a feedback loop?

    An internal or external change called a stimulus triggers the response.

  • What component detects a stimulus in a feedback loop?

    Receptors detect the stimulus.

  • What is the role of the control center in a feedback loop?

    The control center processes information from receptors and directs the response.

  • What are effectors in a feedback loop?

    Effectors are organs or cells that carry out the response.

  • Define the response in a physiological feedback loop.

    The response is the action taken by effectors to adjust the condition.

  • Which feedback mechanism regulates blood sugar levels?

    Negative feedback regulates blood sugar levels.

  • Thermoregulation is an example of which feedback type?

    Thermoregulation is an example of negative feedback.

  • What are the sensors and control center for thermoregulation?

    Thermoreceptors act as sensors; the hypothalamus is the control center.

  • Name the three primary effectors in human thermoregulation.

    Effectors include sweat glands, blood vessels, and skeletal muscles (for shivering).

  • How does the body respond to summer heat to maintain homeostasis?

    It increases sweating and dilates blood vessels to cool the body.

  • How does the body respond to winter cold to restore temperature homeostasis?

    It constricts blood vessels and initiates shivering to generate heat.

  • The release of oxytocin during childbirth is an example of which feedback?

    It is an example of positive feedback.

  • What acts as the initial stimulus in the positive feedback loop of childbirth?

    The stretching of the cervix acts as the initial stimulus.

  • During childbirth, where are nerve impulses from the cervix sent?

    They are sent to the brain to trigger a response.

  • Which gland secretes oxytocin during labor?

    The pituitary gland secretes oxytocin.

  • How does oxytocin affect the uterus during childbirth?

    Oxytocin causes uterine contractions to progress labor.

  • Blood clotting is classified as which feedback mechanism?

    Blood clotting is a positive feedback mechanism.

  • What initiates the blood clotting feedback loop?

    A tear in a blood vessel initiates the loop.

  • Which cells detect a tear in a blood vessel during clotting?

    Platelets act as sensors detecting the tear.

  • What do platelets release as the effector response in clotting?

    Platelets release chemicals that attract more platelets to the site.

  • What concludes the blood clotting positive feedback loop?

    The formation of a blood clot stops the feedback loop.

  • How does positive feedback differ from negative feedback?

    Positive feedback amplifies a process until completion; negative feedback reverses changes to maintain balance.

  • Which hormone increases in response to trauma to keep the body alert?

    Cortisol increases to help maintain alertness.

  • What is a major consequence of chronic high cortisol levels?

    Chronic high cortisol can cause immune suppression and other health issues.

  • What symptoms result from abnormally low cortisol levels?

    Symptoms include fatigue and low blood pressure.

  • How can intense stress lead to a shingles outbreak?

    Stress suppresses the immune system, allowing dormant varicella-zoster virus to reactivate.

  • What is the typical hydrocortisone cream concentration for itching relief?

    Usually a 1% hydrocortisone cream is used.

  • What is the correct sequence of components in a homeostatic feedback loop?

    Stimulus → Receptor → Control Center → Effector → Response

  • How does blood vessel dilation help cool the body?

    Dilation increases blood flow to the skin, promoting heat loss.

  • Why is shivering an effector response to cold?

    Shivering generates heat through muscle contractions to raise body temperature.

  • What term describes the specific value that negative feedback maintains?

    The set point is the value or range maintained by negative feedback.

  • Platelets releasing chemicals to attract more platelets is an example of which feedback?

    This is an example of positive feedback.

  • What is the intended outcome of a negative feedback response?

    To restore balance and return conditions to the set point.

  • Identify the effector in the childbirth feedback loop.

    The uterus is the effector carrying out contractions.

  • What type of receptors detect temperature changes in thermoregulation?

    Thermoreceptors detect temperature changes.

  • What serves as the stimulus for the blood clotting positive feedback loop?

    A paper cut or blood vessel injury acts as the stimulus.

  • What ends the positive feedback loop once the baby is delivered?

    The removal of the stimulus (cervix stretching) ends the loop.

  • Cortisol increases in response to what to help the body stay alert?

    Cortisol increases in response to stress.

  • Blood sugar regulation is an example of which feedback type?

    It is an example of negative feedback.