Medical Quiz

Cell Structure and Functions Quiz


Which of the following statements about the sodium-potassium pump is true?

A. It transports 3 sodium ions out of the cell in exchange for 2 potassium ions

B. It transports 2 sodium ions out of the cell in exchange for 3 potassium ions

C. It transports water directly out of the cell

D. It transports hydrogen ions out of the cell

In a nerve cell, the function of the dendrites is to:

A. conduct impulses away from the cell body.

B. receive impulses and conduct them to the cell body

C. increase the speed at which nerve impulses are carried away from the cell body

D. support and nourish the neuron

This tissue carries nutrients, waste, respiratory gases and many other substances throughout the body

A. Bone

B. Blood

C. Cartilage

D. Muscle

Which of the following molecules is least likely to cross a cellular membrane by simple diffusion?

A. carbon dioxide

B. nitrogen

C. potassium ion

D. water

Who am I? I am dead at maturity and have secondary cell walls composed of lignin.

A. sclerenchyma

B. collenchyma

C. parenchyma

D. phloem

The process illustrated in the figure would most likely be used to transport:

A. glucose

B. hormones

C. potassium ions

D. carbon dioxide

Biological membranes are normally permeable to:

A. large, hydrophilic molecules

B. small, hydrophilic molecules

C. large, hydrophobic molecules

D. small, hydrophobic molecules

What two tissues transport materials throughout the entire plant body?

A. sclerenchyma and xylem

B. phloem and xylem

C. parenchyma and xylem

D. sclerenchyma and collenchyma

__________, which are a type of xylem, are extremely efficient in conducting water.

A. Sieve tube element

B. Sclereid

C. Tracheid

D. Vessel element

Dividing cells are found in all of the following except:

A. Apical meristems

B. Lateral meristems

C. Vascular cambium

D. Fiber cells

Which cells or cell components play an essential role in the clotting of blood?

A. erythrocytes

B. platelets

C. leukocytes

D. plasma

Cells that secrete bone matrix

A. Osteoblast

B. Canaliculi

C. Osteocyte

D. Lamellae

__________ are living cells that do not conduct sugar themselves but play a crucial role in assisting the movement of sugars.

A. Sieve tube elements

B. Sieve plate

C. Tracheids

D. Companion cells

Cholesterol within membranes functions as a(n) __________ through its interactions with both hydrophobic and hydrophilic parts of phospholipids

A. pH buffer

B. ebergy source

C. temperature controller

D. fluidity buffer

Facilitated diffusion:

A. requires a transmembrane protein

B. requires ATP

C. can move molecules against a concentration gradient

D. is typically used to transport small nonpolar molecules

The type of epithelial tissue you would expect to find lining the upper respiratory tract is:

A. Simple squamous epithelium

B. Ciliated columnar epithelium

C. Stratified squamous epithelium

D. Simple cuboidal epithelium


A. is engulfment of large particles by the cell

B. involves the specific binding of molecules to receptors on the cell surface

C. is the nonspecific uptake of fluids by pinching inward of the plasma membrane

D. is movement of molecules against the concentration gradient through a permeable membrane

The extremely flexible tissue that provides support in soft, nonwoody plants, allowing them to grow upward, is:

A. Parenchyma tissue

B. Collenchyma tissue

C. Sclerenchyma tissue

D. Dermal tissue

What is meant by the term “fluid mosaic model”?

A. It is the diffusion of lipid-soluble substances through the lipid bilayer.

B. It is the movement of lipids and integral proteins within the lipid bilayer

C. It is the solubility of water in the membrane

D. It is the method of substance transport across the membrane

A human white blood cell engulfs a bacterial cell by:

A. exocytosis

B. phagocytosis

C. pinocytosis

D. the sodium-potassium pump

Which type of epithelial cells will provide the most protection against abrasion, such as your foot rubbing against the bottom of your shoe?

A. Simple squamous

B. Stratified squamous

C. Simple cuboidal

D. Simple columnar

Used in places where diffusion needs to occur, such as blood vessels and air sacs of lung

A. Simple cuboidal

B. Simple squamous

C. Simple columnar

D. Stratified squamous

Both smooth muscle fibers and cardiac muscle fibers:

A. have striations.

B. are under involuntary control.

C. are multinucleate.

D. have branching

Parenchyma, collenchyma, and sclerenchyma are classified as:

A. Dermal tissues

B. Vascular tissues

C. Ground tissues

D. Primary tissues

The type of tissue represented is:

A. Compact bone

B. Hyaline cartilage

C. Simple squamous epithelium

D. Blood


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