NAS 2 Quiz 4 Membrane Transport and The Cell
NAME:
Figure 3.2
Using Figure 3.2, match the following:
1) Nonpolar region of phospholipid. ____
2) Glycocalyx. ____
3) Polar region of phospholipid. ____
4) Peripheral protein. ____
5) Integral protein. ____
6) Identification "tags" for the cell. ____
7) Hydrophilic portion of phospholipid. ____
Match the following:
A.
B.
C.
D.
E.
Nucleus
Microtubules
Endoplasmic reticulum
Ribosomes
Nucleoli
8) Plays a role in the synthesis of steroid-based hormones and proteins. ____
9) The actual site of protein synthesis. ____
10) Hollow cytoskeletal elements that act as organizers for the cytoskeleton. ____
11) Dense spherical bodies in the nucleus that are the synthesis site for ribosomal RNA. ____
12) Houses DNA and RNA. ____
True/False Questions
13) In osmosis, movement of water occurs toward the solution with the lower solute
concentration.
14) A process by which large particles may be taken into the protection of the body by
invaders like bacteria, or for disposing of old or dead cells is called phagocytosis.
15) The glycocalyx is often referred to as the "cell coat," which is somewhat fuzzy and sticky
with numerous cholesterol chains sticking out from the surface of the cell membrane.
16) Interstitial fluid represents one type of extracellular material.
17) Microtubules are hollow tubes made of subunits of the protein tubulin.
18) The speed of individual particle diffusion is influenced by temperature and particle size,
not by concentration.
Multiple Choice. Circle the best choice.
19) Which vesicular transport process occurs primarily in some white blood cells and
macrophages?
A) exocytosis
B) phagocytosis
C) pinocytosis
D) intracellular vesicular trafficking
20) Which of the following describes the plasma membrane?
A) a single-layered membrane that surrounds the nucleus of the cell
B) a double layer of protein enclosing the plasma
C) a phospholipid bilayer surrounding the cell
D) a membrane composed of tiny shelves or cristae
21) Which of these is not a function of the plasma membrane?
A) It is selectively permeable but permits water and gases to cross.
B) It prevents potassium ions from leaking out and sodium ions from crossing into
the cell.
C) It acts as a site of cell-to-cell interaction and recognition.
D) It encloses the cell contents in such a way that water I the body is divided into
separate compartments.
22) Which structures are fingerlike projections that greatly increase the absorbing surface of
cells?
A) stereocilia
B) microvilli
C) primary cilia
D) flagella
23) Which type of cell junction acts as anchors and distributes tension through a cellular
sheet and reduces the chance of tearing when it is subjected to great mechanical stress?
A) gap junctions
B) desmosomes
C) connexons
D) tight junctions
24) If cells are placed in a hypertonic solution containing a solute to which the membrane is
impermeable, what could happen?
A) The cells will swell and ultimately burst.
B) The cells will lose water and shrink.
C) The cells will shrink at first, but will later reach equilibrium with the surrounding
solution and return to their original condition.
D) The cells will show no change due to diffusion of both solute and solvent.
25) Which of the following is a function of a plasma membrane protein?
A) circulating antibody
B) molecular transport through the membrane
C) forms a lipid bilayer
D) oxygen transport
26) Which transport process is the main mechanism for the movement of most
macromolecules by body cells?
A) phagocytosis
B) pinocytosis
C) receptor-mediated endocytosis
D) secondary active transport
27) Passive membrane transport processes include ________.
A) movement of a substance down its concentration gradient
B) movement of water from an area of high solute concentration to an area of low
concentration
C) consumption of ATP
D) the use of transport proteins when moving substances from areas of low to high
concentration
28) Which of the following is NOT a function of the smooth endoplasmic reticulum?
A) lipid metabolism and cholesterol synthesis
B) steroid-based hormone synthesis
C) breakdown of stored glycogen to form free glucose
D) protein synthesis in conjunction with ribosomes
29) Mitochondria ________.
A) are always the same shape
B) are single-membrane structures involved in the breakdown of ATP
C) contain some of the DNA and RNA code necessary for their own function
D) synthesize proteins for use outside the cell
30) A Peroxisomes ________.
A) are also called microbodies, and contain acid hydrolases
B) are able to detoxify substances by enzymatic action
C) function to digest particles ingested by endocytosis
D) sometimes function as secretory vesicles
31) Which of the following is NOT a function of lysosomes?
A) digesting particles taken in by endocytosis
B) degrading worn-out or nonfunctional organelles
C) forming acid hydrolases which are necessary to help form cell membranes
D) breaking down bone to release calcium ions into the blood
Fill in the Blank.
A) Mitochondria B) Exocytosis C) Microtubules
32) ________ are hollow tubes made of spherical protein subunits called tubulins.
33) Aerobic cellular respiration occurs in the ________.
34) The process of discharging particles from inside a cell to the outside is called ________.