BIOL 2160 Chapter : 2160 Test 2

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azuremammoth471

15 Mar 2019

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Why!is!energy!needed!for!the!na+!/!k+!atpase: move%into%the%cell, move!out!of!the!cell, move!equally!in!both!directions, for!a!normal!cell,!if!the!membrane!potential!were!w100!mv,!you!would!expect!k+!to:, move!out!to!the!cell, move%into%the%cell, if!a!cell!has!a!membrane!potential!of!w65!mv,!what!does!this!mean, the%inside%of%the%cell%is%65%mv%more%negative%than%the%outside, the!outside!of!the!cell!is!65!mv!more!negative!than!the!inside, none!of!the!above, which!of!the!following!is!an!example!of!cotransport?, solution!a!has!a!concentration!of!8!m!glucose. !solution!b!has!a!concentration!of!3!m! glucose. !which!solution!has!more!free!water!molecules: because!na+!is!being!moved!against!its!concentration!gradient, because!k!is!being!moved!against!its!concentration!gradient, both%a%and%b, none!of!the!above, the!na+!/!k+!atpase, movement%of%glucose%and%na+%into%the%cell, movement!of!glucose!into!the!cell!and!na+!out!of!the!cell, all!of!the!above, none!of!the!above! shared via c ourse h ero. co m. T his study resource w as: the!intracellular!solution!is!hyperosmotic!to!the!extracellular!solution, the%intracellular%solution%is%hyposomotic%to%the%extracellular%solution, the!intracellular!solution!is!isowosmotic!to!the!extracellular!solution, none!of!the!above, if!a!cell!were!placed!in!a!solution!and!the!mass!of!the!cell!increased,!which!of!the! following!must!be!true?, solution!a, solution%b, true%, false, true!or!false:!osmosis!is!always!a!passive!process, if!a!cell!with!a!2m!internal!sucrose!concentration!were!placed!in!a!5m!sucrose!solution,! what!would!you!expect!to!happen, the!cell!would!swell, the%cell%would%shrivel%up, the!cell!wouldn"t!change!at!all! https://www. coursehero. com/file/19318661/actual-test-2-fall-2015pdf, a!nonwspecific,!large,!solid!molecule!would!most!likely!enter!the!cell!through!which! process, phagocytosis, pinocytosis, receptorwmediated!endocytosis, exocytosis, some!depression!medications!block!which!process, phagocytosis, pinocytosis, receptorsmediated%endocytosis, exocytosis, which!of!the!following!is!an!example!of!a!passive!transport!mechanism, a%% Ions: hormones, neurotransmitters, paracrines, simple!diffusion, facilitated!diffusion, diffusion!through!ion!channels, all%of%the%above, none!of!the!above! shared via c ourse h ero. co m. T his study resource w as: specificity, duplicity, affinity, redundancy, hydrophilic!messengers, hydrophobic%messengers, on!the!cell!membrane! Inside%the%cell: mark! a !on!your!scantron!and!take!a!deep!breath. !you!can!do!this. , which!of!the!following!chemical!messengers!travels!the!greatest!distance, which!of!the!following!will!most!likely!be!bound!to!carrier!proteins!in!the!bloodstream, where!would!you!expect!find!a!receptor!for!a!hydrophobic!messenger, ______!is!a!measure!of!how!many!ligands!a!particular!receptor!binds!to. , a!ligand!that!binds!a!receptor!and!does!not!cause!a!biological!response!is!called:, agonist, antagonist, hormone, hydrophilic! https://www. coursehero. com/file/19318661/actual-test-2-fall-2015pdf, alpha, beta, gamma, delta, gtp, gdp, ligand, atp, which!of!the!following!ion!channels!typically!stay!open!longest?, an!activated!g!protein!will!have!_____!bound!to!it. ! (repeated!question), fast!ligandwgated!ion!channel, g%proteinsregulated%ion%channels, enzymewlinked!channels! shared via c ourse h ero. co m. T his study resource w as: neurotransmitters!are!polar, paracrines!enter!the!bloodstream, neurotransmitters!enter!the!bloodstream, neurotransmitters%are%only%produced%by%neurons, paracrines!travel!longer!distances, change%in%protein%synthesis, activation!of!effector!enzymes, activation!of!g!protein!coupled!receptors, all!of!the!above!

Related Questions

Match each term

1.facilitated diffusion 2. Hypertonic solution
3. Hypotonic solution
4. Active Transport
5. Secondary acive transport
6. Simple Diffusion

A.	The transport of a nonpolar molar across a biological membrane from the compartment with a high concentration to one with low concentration.
B.	A process that utilizes energy to move compounds against a concentration gradient, i.e., from the compartment with lower concentration to one with a higher concentration.
C.	a solution that would cause blood cells to swell and burst
D.	a solution that would cause red blood cells to shrink
E.	The transport of a hydrophilic molecule across a biological membrane using an ion gradient created by an electrogenic pump.
F.	A process by which compounds are transported from a region of high concentration to one of lower concentration using membrane proteins as transporters.

Please help! Not sure about these questions..thanks

Which can cross the phospholipid bilayer of a membrane without assistance from transport proteins?

	A.	Ions such as Na+.
	B.	Small hydrophobic molecules such as O2.
	C.	Small hydrophilic molecules such as glucose.
	D.	Any small molecule or ion.

QUESTION 2

Which transport process requires a cell to expend energy?

	A.	Moving a solute up its concentration gradient.
	B.	No transport processes require energy.
	C.	Moving a solute either up or down its concentration gradient.
	D.	Moving a solute down its concentration gradient.

QUESTION 3

Imagine a cell whose membrane is permeable to water, but impermeable to solute X. If solute X is more concentrated outside the cell than inside, which way will water move by osmosis?

	A.	Water will not move in either direction, in or out of the cell.
	B.	Water will move equally in both directions, in and out of the cell.
	C.	Water will leave the cell.
	D.	Water will enter the cell.

QUESTION 4

The cellular structure that encloses the DNA/genes is the

		ribosome.
		plasma membrane.
		nucleus.
		mitochondrion.

QUESTION 5

The part of metabolism that builds larger, more complex molecules or structures from smaller, simpler components is

	A.	anabolism.
	B.	catabolism.
	C.	catalysis.
	D.	hydrolysis.

QUESTION 6

In an exergonic reaction

	A.	the reactants have more energy than the products, so energy is absorbed.
	B.	the reactants have more energy than the products, so energy is released.
	C.	the reactants have less energy than the products, so energy is released.
	D.	the reactants have less energy than the products, so energy is absorbed.

3. In an aqueous environment, the phospholipids of a membrane____.

a) are arranged in a single layer

b) are arranged in a bilayer with the polar heads of each layerlocated at the surface

c) are arranged in a bilayer with the fatty acid tails locatedat the surface

d) are arranged in a bilayer but the phospholipids have nospecific orientation

e) dissolve

4. which of the following molecules demonstrate dual solubilitycharacteristics

a) sterols only

b) proteins only

c) phospholipids only

d) sterols and phospholipids

e) sterols, phospholipids, and proteins

5. The "mosaic" part of the fluid mosaic model refers to themembrane ____.

a) proteins

b) phospholipids

c) cholesterol

d) functions

e) layers

9. Transport of a molecule across a cell membrane by facilitateddiffusion ____.

a) does not exhibit specificity for a particular type ofmolecule

b) requires the input of energy

c) depends on a concentration gradient

d) goes against the concentration gradient

e) allows non-polar uncharged molecules to diffuse across amembrane

13. A transport system in which transport of an ion in onedirection provides the energy for active transport in the oppositedirection is known as ____.

a) primary active transport

b) active diffusion

c) secondary active transport

d) cotransport

e) osmosis

14. Cells undergo exocytosis ____.

a) to pump protons down a concentration gradient

b) when replicating

c) to secrete protein and wastes from the cell

d) to ingest nutrients

e) as a means of cellular protection

15. What is the molecular basis of familialhypercholestremia?

a) HDL enters cells using a specific receptor on the cellsurface

b) LDL enters cells using a specific receptor on the cellsurface

c) HDL exits cells using a specific receptor on the cellsurface

d) LDL exits cells using a specific receptor on the cellsurface

e) receptor-mediated exocytosis

16. Carrier molecules are utilized for ____.

a) active transport only

b) passive transport only

c) both active and passive transport

d) osmosis

e) transport of all types of molecules

17. All of the following are functions of integral membraneproteins EXCEPT ____.

a) transport of polar molecules

b) reception of chemical signals form other cells

c) cell division

d) recognition of other cells as being "like"

e) cell-cell binding

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BIOL 2160 Chapter : 2160 Test 2

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