PRIN401 WEEK 8
homeostasis
homeostasis
Kartei Details
| Karten | 9 |
|---|---|
| Sprache | English |
| Kategorie | Medizin |
| Stufe | Universität |
| Erstellt / Aktualisiert | 22.10.2014 / 23.10.2014 |
| Lizenzierung | Keine Angabe |
| Weblink |
https://card2brain.ch/box/prin401_week_8_
|
| Einbinden |
<iframe src="https://card2brain.ch/box/prin401_week_8_/embed" width="780" height="150" scrolling="no" frameborder="0"></iframe>
|
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)
