membrane proteins

0.0(0)
studied byStudied by 0 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/22

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

23 Terms

1
New cards

Membrane that differ in function also differ in

Their protein content

2
New cards

What do proteins transport

Chemicals and information

3
New cards

Integral membrane proteins

Embedded in the hydrocarbon chains of membrane lipids, and they can be release only when the membrane is physically disrupted

4
New cards

Peripheral membrane proteins

Bound to the head group of lipids or the exposed portions of integral membrane proteins by electrostatic and H bond interactions

5
New cards

Alpha helices or beta sheets in the hydrophobic region of the membrane have what type of amino acids

Hydroponics

6
New cards

Alpha helices or beta sheets in the water soluble region of the membrane have what type of amino acids

Ionic

7
New cards

What type of amino acids do loops and turns have

Ionic bc facing aqueous environment

8
New cards

What factors determine whether a small molecule will cross a membrane

The concentration gradient of the molecule across the membrane or the molecules solubility in the hydrophobic environment

9
New cards

What method of transport do lipophillic molecules use

Simple diffusion

10
New cards

What method of transport do polar molecules use

Passive transport, active transport, facilitated transport

11
New cards

Passive transport

Movement with the concentration gradient with no added energy

12
New cards

Facilitated diffusion

Diffusion through a protein channel with no added energy

13
New cards

Active transport

Movement against the concentration gradient with added energy

14
New cards

Primary transporters

Hydrolyzes ATP and transports molecules against their gradient

15
New cards

Secondary transporters

Couple transport of molecules against the concentration gradient to transport of a molecule with its concentration gradient

16
New cards

Ion channels are what type of transport

Passive

17
New cards

How much faster is ion transport rates compared to ion pumps

1000 times

18
New cards

Voltage gated channels

Open in response to changes in membrane potential

19
New cards

Ligand hated channels

Opened in response to the binding of small molecules such as neurotransmitters

20
New cards

How does an ion move through a channel

Ion has hydration shell that is removed as it travels down the channel. The water molecules are replaced by oxygen atom interactions lining the selectivity filter. As the ion gets closer to moving inside, the oxygen breaks its bond with the ion and water reforms shell

21
New cards

How are ion channels selective

Structure of the ions determines specificity. Larger ions are too big to enter channel and smaller ions can’t interact with the selectivity filter

22
New cards

Na-K ATPase

Hydrolysis of ATP provides energy needed for the active transport of three Na out and two potassium in against their gradients

23
New cards

Na-K ATPase and SGLT

ATPase move Na outside against its concentration gradient and there is high amounts outside. SGLT uses Na gradient to move Na and glucose inside