Welcome to ANP 213 - North Seattle Community College

48 Pages·2007·2.11 MB·English

by  Suzanne Schlador

Welcome to ANP 213
• Introduction, Syllabus
and Attendance
• Chapter 1- Overview of
Anatomy and Physiology
• Chapter 2- Chemistry Review
Chapter 1
• “Form fits function”
• Homeostasis
• Levels of organization
What is ‘ANP’?
• Anatomy-
• Physiology-
Form Fits Function
• Are anatomy and physiology really that
different?
• You need to understand the parts and how
they are put together to know how they
work
• If you know what a body structure does,
you can usually predict how it is organized
to do its job
Another Example
Radius
Ulna
19
hand
bones!
Why does this bone have a huge
hole in it?
Vertebral foramen
Homeostasis Seattle
Link
• Homeostasis-
• Or-
• Significance of maintaining homeostasis?
– Examples
• Both the nervous system and endocrine
system play important roles in maintaining
homeostasis
Homeostasis and Feedback Loops
• All systems involve three components: a ‘receptor’, a
control center and an effector

Stimulus
(input into the system)
RECEPTOR
EFFECTOR
(ie. free CONTROL CENTER Response
(such as a muscle,
nerve ending (such as the brain)
(system’s output)
or a gland)
in the skin)
The response to the stimulus leads to
change. The change is ‘fed back’ to the
receptor.
Homeostasis and Feedback
Loops
• In negative feedback a stimulus causes a response
which works to reduce/counteract
the stimulus
– Stabilizing
– Examples?
• In positive feedback a stimulus causes a response
which further increases the stimulus
– Examples?
To truly understand ANP, we
have to start small
• How small?
• Chemistry small!
• How big is an atom?
The approximate atomic radius of an atom of gold is 0.1441 nanometers or
0.1441 x 10-9 meters (i.e. 0.1441 millionth of a millimeter!)