Cells & Organelles

Question 1

Cytoskeleton

Answer 1

Tubules and filaments in the cytosol

Question 2

Function of the cytoskeleton

Answer 2

Maintain cell shape, mechanical support

Question 3

Microfilaments

Answer 3

Composed of two strands of actin that function in cell motility

Question 4

Intermediate filaments

Answer 4

Composed of coiled proteins that provide support to maintain cell shape

Question 5

Microtubules

Answer 5

Tubes made of tubulin. Provide support/motilty

Question 6

Peripheral proteins

Answer 6

Attached to membrane surface

Question 7

Integral proteins

Answer 7

Extend into the membrane and have hydrophobic regions

Question 8

Transmembrane proteins

Answer 8

Integral proteins that pass all the way through the membrane, connecting the interior/exterior of the cell to allow substance flow

Question 9

Transport proteins

Answer 9

Transport materials across membrane

Question 10

Channel proteins

Answer 10

Hollow tubues substances can move through

Question 11

Ion channels

Answer 11

Allow passage of ions across the membrane

Question 13

Voltage gated

Answer 13

Opens/closes in response to membrane potential

Question 14

Mechanically gated

Answer 14

Opens in response to pressure, vibration, temp

Question 15

Ligand gated

Answer 15

Molecules binds to open the channel

Question 16

Carrier proteins

Answer 16

Pass molecules across the membrane by changing shape

Question 17

Receptor proteins

Answer 17

Binding site for hormones and other signaling molecules that trigger changes inside cell when activated

Question 18

Glycoproteins

Answer 18

Proteins with carbohydrates attached