week 1 - intro to anatomy, membranes and body fluids

Question 1

What is anatomy?

Answer 1

the study of body functions (biochemical, physical, mechanical)

Question 2

what is the difference between anatomy and physiology?

Answer 2

anatomy deals with the location and structure of a body part, whereas physiology deals with the function of a body part.

Question 3

What is homeostasis?

Answer 3

the process by which a nearly stable environment is maintained in the body so that cellular functions can continue at maximum efficiency

Question 4

what are some features of a plasma membrane?

Answer 4

• highly selective permeability
• lots of transport proteins and pumps for uptake + removal of substances
• vital for regulation of intracellular environment

Question 5

what is the phospholipid bilayer itself (without transport proteins) impermeable to?

Answer 5

ions and polar molecules

Question 6

how is permeability provided in the phospholipid bilayer?

Answer 6

channel proteins
carrier proteins
pumps (e.g. Na+ / K+ pump)

Question 7

what are the 3 types of carrier protein?

Answer 7

• facilitator (uniport) - transports one ion at a time - pretty boring
• cotransporter (symport) - can transport two different ion species at one time
• exchanger (antiport) - has to exchange ions to maintain electrical neutrality - e.g. will remove an Na+ ion from cell but will intake a H+ ion - no net change in charge