Proteins_Part+II_S10_Student

Proteins_Part+II_S10_Student - ProteinsPart II Chapter 6...

Info iconThis preview shows pages 1–17. Sign up to view the full content.

View Full Document Right Arrow Icon
Proteins—Part II Chapter 6
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Roles of proteins Building materials for growth & maintenance _Enzymes_ Hormones Fluid balance regulators Acid-base regulators Transporters _antibodies_ _energy_ source
Background image of page 2
Building materials for growth & maintenance _collagen__ Bone matrix Ligaments and tendons “_give_” between arterial walls Scar tissue Cell replacement Skin (life span: about 30 days) Muscle cells (in response to exercise) GI tract (every few days)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Enzymes _All enzymes_ are proteins Catalysts for reactions, but _unchanged_ by reactions Anabolic and catabolic Example: ministers
Background image of page 4
Hormones _some hormones are proteins 1.Endocrine gland releases hormone 2.Hormone travels to target cells 3.Hormone elicits appropriate response 1. Example: insulin
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Fluid balance regulators Proteins cannot travel freely between compartments, but fluid can Plasma proteins _attract water_ If excess protein in interstitial space _edema_
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Acid-base balance regulators Large amount of _h+ions_ in acidic environment Protein surface _negatively_charged attracts H+ ions buffer
Background image of page 8
Transporters Transport proteins are specific _hemoglobin_ Carries oxygen from lungs to cells _lipoproteins_ Carry lipids around body Other transport proteins Carry vitamins and minerals
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Antibodies Antibodies produced in response to _antigens Each antibody is antigen-specific Next time body is exposed to same antigen, more rapid antibody response (_immunity_)
Background image of page 10
Energy source Proteins sacrificed during starvation or period of inadequate CHO intake _glycogenic_AA’s (converted to pyruvate or enter TCA cycle directly) _ketogenic_ AA’s (converted to acetyl-CoA)
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Other protein functions _blood clotting_ Fibrin Collagen Vision _opsin_ changes shape in response to light initiates nerve impulse
Background image of page 12
Deamination Amino group removed first from AA _keto acid_ and ammonia formed
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Transamination Amino group from one AA is transferred to a keto acid to form a ____________________
Background image of page 14
Ammonia metabolism 1. In _liver_, ammonia produced after deamination of AA 2. Ammonia (toxic) + carbon dioxide _urea_ (less toxic) 3. _urea_ enters bloodstream and travels to kidneys 4. _urea_ excreted from kidneys via urine
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Diagnosis…?
Background image of page 16
Image of page 17
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/26/2012 for the course NTDT 200 taught by Professor Aljadir during the Fall '08 term at University of Delaware.

Page1 / 54

Proteins_Part+II_S10_Student - ProteinsPart II Chapter 6...

This preview shows document pages 1 - 17. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online