Amino group needs to be excreted

1
Outline for today

• Continuing our overview of nutrition
• Nutrient types (proteins, vitamins, minerals)
• Hunger/satiety
• Guidelines for healthy diets
• Nutrient density
• Food pyramid/dietary guidelines/RDAs etc
• CPS system

http//chemistry.ucsc.edu/Faculty/Fink/80A-2004/20
04index.htm
2
Announcements

• Discussion sections start next week
• The PowerPoint slides I used in lecture are
  accessible through lecture outlines
• Please register your response pad (the clicker,
  TV-remote-like thing) on the web ASAP

3
The CPS system

• See the class web page for directions to register
  your response pad (blue clicker).
• Connect to www.einstruction.com
• Click on the Student button.
• Select University of cal, Santa Cruz from the
  drop-down menu
• Click Choose Site.
• Enter the class key (Q3442S546) into the Class
  Key box.
• Enter the response pad's serial number in the
  Serial Number box. The serial number is printed
  on the back of the pad
• Enter the enrollment code into the Enrollment
  Code box. Your enrollment code is packaged with
  your textbook.

4
The CPS system

• Click Join the Class, you will need to enter a
  username, password and email address. Use a
  username and password that you can easily
  remember and that other people are not likely to
  guess. You will receive a reminder message via
  the email address you provide from CPSOnline
  about your username, password, and assigned
  response pad
• Click Finish.
• Click Enter on the page that confirms that you
  are now a member of the class and reminds you of
  your username, password, and assigned response
  pad number for the class.
• Click Log Out.

5
CPS contd.

• So, well now try it out.

6
So, back to Nutrients

• Finished up last time on lipids
• Heres what a triglyceride looks like
• (Triglycerides are the most common nutritional
  lipid, consisting of three fatty acids linked to
  a glycerol (glycerine) molecule.)
• Remember, well fo over the nutrients in more
  detail later.

7
(No Transcript)
8
Proteins
source of amino acids for growth new proteins
(for tissues, antibodies, enzymes, hormones
etc.), can provide energy, are important
structural and functional components of bodies

• Composed of C, O, H, N
• Basic unit is amino acid (string of beads)
• Make up bones, muscles, other tissues, and
  components
• (9) Essential amino acid
• (11) Nonessential amino acid
• Energy yielding (4 kcal /gm)

9
(No Transcript)
10
Space-filling model of the protein hemoglobin
11
Fig. 1.1c
12
Vitamins

• Composed of various elements
• Essential for life
• Enable chemical reactions
• Needed in tiny amounts
• Fat soluble or Water soluble
• Yield no energy
• Most are precursors of coenzymes, E and C are
  antioxidants

13
Minerals

• Inorganic substances e. g.s Sodium, chloride,
  potassium, calcium, iron, iodide, manganese,
  zinc, selenium
• Function in cellular process, nervous system,
  water balance, bones
• Needed in tiny amounts
• Not destroyed in cooking
• Trace minerals/Major minerals
• Yield no energy

14
Water

• Vital to life
• Requirement about 8 cups/day
• Is a solvent, lubricant, medium for transport,
  chemical processes, and temperature regulator
• Makes up majority of our body (60)
• not necessarily as glasses of water can be
  any food/drink containing water
• (varies with size, activity, temperature)