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► Med Misc 44 > Cell Physiology > Flashcards

Flashcards in Cell Physiology Deck (25)
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1
Q

Non polar carry what charge?

A

Positive and negative uniformly

2
Q

what is the charge with nonpolar molecules

A

no net charge

3
Q

non polar molecules readily dissolve in what? water or lipids?

A

lipids

4
Q

are nonpolar molecules lipophillic or hydrophilic?

A

lipophilic and hydrophobic

5
Q

what type of molecules have a region with a cluster of positive and a region with a cluster of negative charges?

A

Polar molecules

6
Q

what is the charge of Polar molecules?

A

no net charge

7
Q

are polar molecules lipophilic or hydophillic?

A

hydrophilic and lipophobic

8
Q

O2 and Isoflurane are ex of nonpolar or polar molecules

A

nonpolar

no net charge

Lipophilic

9
Q

glucose is an example of what what molecule nonpolar or polar?

A

polar

no net charge

hydrophilic

10
Q

do ions have a charge?

A

yes

11
Q

do ions have a negative or positive charge?

A

both

12
Q

what are negative ions called? give 2 examples

A

anions

HCO3-

Cl-

13
Q

what are positive ions called? give examples.

A

Cations

Na+

Ca++

K+

14
Q

hydrophilic

A

water loving

water soluble

15
Q

hydrophobic

A

water hating

lipid soluble

16
Q

Lipophilic

A

lipid loving

lipid soluble

17
Q

Lipophobic

A

lipid hating

water soluble

18
Q

2 functions of lipid bylayer

A
  1. Serves as a barrier (to substances that are not small enough or not lipd soluble)
  2. Provides enviroment (in which membrane proteins can function)
19
Q

Hydro_____ molecules (including IV and inhalation agents) and small uncharged polar molecules (H20 CO2) readily penetrate the lipid bylayer.

A

phobic

20
Q

Large uncharged polar molecules such as glucaise and ions (do or Do not) penetrate the lipid bylayer.

A

do not

21
Q

Types of Receptors:

what 2 receptors control ion channels?

A

ligand-gated ion channel

Ionotropic receptors

22
Q

Types of Receptors:

what are 4 ex of what a ligand is?

A

chemical

Drug

neurotransmitter

hormone

23
Q

Types of Receptors:

how do ligand or ionotropic receptors work?

A

when a ligand attaches to its receptor, the channel opens and substancs specific to that channel diffuse down their concentration gradients.

24
Q

Types of Receptors: Ligand gated

for ex. at the NMJ ACh binds to the nicotinic receptor (nAChR) and th channel opens. what ions diffuse in and out?

A

Na+ in

Ca++ in

K+ out

25
Q

Types of Receptors:

whata re 3 other ex of ligand gated receptors

A

5-HT3

GABAa

Glutamate

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