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PRIN401 WEEK 8

homeostasis

homeostasis

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L. L.
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L. L.
This flashcard set delves into the autonomic nervous system and its reflexes, focusing on key components like afferent and efferent nerves, and their roles in regulating body functions such as temperature, blood clotting, and uterine contractions. It also covers feedback mechanisms, including positive feedback in childbirth and blood clotting, as well as feedforward control mechanisms. Ideal for university students studying medical topics, this flashcard set provides essential insights into how the nervous system maintains homeostasis and regulates various physiological processes.
Cartes-fiches
9
Utilisateurs
1
Langue
Anglais
Catégorie
Médecine
Niveau
Université
Créé / Mis à jour
22.10.2014 / 23.10.2014
  • 1  / 9

Cartes-fiches

OCT 20. HOMEOSTASIS. DR. PAWEL KINDLER. Normal body temperature is considered to be _____ degrees Celsius, normal rectal temp is ____ degrees Celsius higher. The core body temp or temp of deep body tissues remains almost _______.

36.8

0.6

 

constant

What is an important feature of feedforward control mechanisms?

the regulated variables are not measured directly (because the controller simply 'anticipated' a change will happen and prepares for it) 

 

(from 'HOMEOSTASIS' p.5)

Explain how positive feedback is involved in blood clotting.

1. damage to a blood vessel initiates formation of a clot

2. Clotting factors activate enzymes that haven't been activated yet to help clot the blood, and this in turns activiates more adjacent enzymes

3. more clotting is induced until the opening in wall is plugged and the bleeding stops 

 

(from 'HOMEOSTASIS' p.6)

Explain how positive feedback is involved in childbirth (4 steps) 

 

 

1. Baby's head stretches cervix

2. Increased stretch of cervix increases uterine contraction and also releases more oxytocin

3. Increased uterine contraction pushes baby down, further stretching the cervix; oxytocin has the same effect

 

(from 'HOMEOSTASIS' p.6)

In life, what represents the arrows in negative feedback control systems that maintain homeostasis? Transmission of information in such systems is provided by the _____, _______, and _________ systems. 

nervous

endocrine

Immune

 

(from 'HOMEOSTASIS' p.6)

OCT 21. THE AUTONOMIC NERVOUS SYSTEM AND AUTONOMIC REFLEXES. KENNETH G. BAIMBRIDGE. Whicih of the following are function regulated by the ANS?

 

(from "THE AUTONOMIC NERVOUS SYSTEM AND AUTONOMIC REFLEXES" p.1)

The ANS has which three major components?

  • Afferent nerves (sends sensory info to the brain) 
  • CNS (signal integration and action)
  • Efferent nerves (sends info to the target cells)

(from "THE AUTONOMIC NERVOUS SYSTEM AND AUTONOMIC REFLEXES" p.1)

Touch, pain , temperature, and proprioception are often components of "________ ________"

autonomic reflexes (from "THE AUTONOMIC NERVOUS SYSTEM AND AUTONOMIC REFLEXES" p.1)

what is Sara's lastname?

Sass

 

(from "THE AUTONOMIC NERVOUS SYSTEM AND AUTONOMIC REFLEXES" p.1)

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