Summer TA Section 3 (7/6)

Which of the following is NOT a function of the plasma membrane?

• Physical barrier

• Small molecule exchange

• Energy production

• Cell attachment

Select the true statements.

• Hydrophilic molecules are polar

• Hydrophilic molecules are non-polar

• Hydrophobic molecules are polar

• Hydrophobic molecules are non-polar

Higher cholesterol makes the membrane

• Less stiff

• More stiff

• Thinner

• Thicker

Scramblases are found in the __ and result in __ distribution of phospholipids

• ER, specific

• ER, random

• Golgi, specific

• Golgi, random

The Na+/K+ exchanger transports Na+ __ and K+ __

• in, in

• in, out

• out, in

• out, out

Which type of receptor on endothelial cells recognizes specific oligosaccharides to recruit neutrophils

• Integrin

• Collagen

• Glucose

• Lectin

Transporters in mitochondria

• Import pyruvate

• Export pyruvate

• Import ATP

• Export ATP

Which of the following requires ATP for transport

• Glucose transporter

• K+ channel

• Na+/K+ pump

• Aquaporins

An example of symport is

• Na+/K+

• O2/CO2

• Glucose/K+

• Glucose/Na+

Membrane bound organelles arose from

• Viral infection

• Bacterial symbiosis

• Genetic mutation

• Cell fusion