Unit 1: Notes 2 Flashcards Preview

Human Anatomy & Physiology > Unit 1: Notes 2 > Flashcards

Flashcards in Unit 1: Notes 2 Deck (16)
Loading flashcards...
1

what is homeostasis?

maintaining a stable internal environment

2

what happens if homeostasis is disrupted?

it can result in illness, disease, and death if disrupted

3

when a stimulus is encountered, body systems _____ and _____

Monitor, Adjust

4

what must the body monitor and adjust?

volume in composition of body fluids, body temperature, sugar levels, calcium levels

5

why does the nervous system play a major role

because it response to external stimuli (e.g. a hot stove) w short term nerve responses

6

why does the endocrine system play a major role

because it response to internal conditions with long-term chemical controls - hormones

7

what are the three parts of a Basic homeostasis feedback loop

receptor, control center, effector

8

are negative feedback loops more common or more rare?

more common

9

are positive feedback loops more common or more rare?

more rare

10

does negative feedback loops oppose original stimulus or enhance the original stimulus

opposes

11

does the Positive feedback loop oppose the original stimulus or enhance the original stimulus?

enhances

12

does the negative feedback loop restore homeostasis what does it continue to disrupt homeostasis?

restores the homeostasis

13

does the positive feedback loop restore homeostasis or continue to disrupt homeostasis?

continue to disrupt homeostasis

14

what is the state of equilibrium?

- exists when opposing forces are in balance
- When homeostasis is threatened, physiological systems attempt to restore balance
- failure = disease or death

15

name some examples of negative feedback loops

hyperthermia, hypothermia, blood pressure

16

name some examples of positive feedback loops

Labor, blood clotting, digestion