Which of the following organelles of the cell is closest in proximity to the nucleus?
A. Endoplasmic Reticulum
B. Golgi Apparatus
C. Lysosome
D. Mitochondria - Answers A. Endoplasmic Reticulum
All the following structures can be located within the plasmalemma of a cell EXCEPT one. The
EXCEPTION is
A. Cholesterol
B. Cytosol
C. Integral Proteins
D. Lipid Rafts - Answers B. Cytosol
A cell that is actively synthesizing proteins or is located with a rapidly growing tumor is characterized by
a large
A. Actin microfiber
B. Nuclear pore
C. Nucleolus
D. Smooth ER - Answers C. Nucleolus
Which organelle of the cell would be present in large numbers in cells requiring large amounts of
energy? - Answers Mitochondria
The mechanism by which a bacterium is brought into a cell is called - Answers Phagocytosis
A problem involving a hormone being recognized by a receptor most likely involves
A. Cholesterol molecules
B. Integral proteins
C. Lysosomes
D. Pinocytosis - Answers B. Integral Proteins
The mechanism by which extracellular fluid is brought into a cell is called
,A. Exocytosis
B. Phagocytosis
C. Pinocytosis
D. Receptor mediated endocytosis - Answers C. Pinocytosis
Transport vesicles carry proteins to what organelle to complete posttranslational modifications
A. Golgi Apparatus
B. Mitochondria
C. Rough endoplasmic reticulum
D. Smooth endoplasmic reticulum - Answers A. Golgi apparatus
The network of microfilaments that form a sheath beneath the plasmalemma is formed from
A. Actin
B. Keratin
C. Lamin
D. Vimentin - Answers A. Actin
Which of the following organelles of the cell initiates packing, concentration and storage of secretory
products by secretory vesicles?
A. Golgi Apparatus
B. Mitochondria
C. Rough endoplasmic reticulum
D. Smooth endoplasmic reticulum - Answers A. Golgi Apparatus
All the following are functions of the plasmalemma of a cell EXCEPT one. The EXCEPTION is:
A. Communication via receptors
B. Provides a flexible boundary that protects the contents of the cell
C. Regulates entry and exit of materials into and from the cell
D. Regulates transport between the cytoplasm and nucleus
,E. Separates substances outside the cell from those within the cell - Answers D. Regulates transport
between the cytoplasm and nucleus
The mechanism by which a ligand attaches to an integral protein to trigger an action of the cell is called:
A. Exocytosis
B. Phagocytosis
C. Pinocytosis
D. Receptor-mediated endocytosis - Answers D. receptor mediated endocytosis
Aerobic respiration of a cell occurs in what organelle?
A. golgi apparatus
B. mitochondria
C. rough endoplasmic reticulum
D. smooth endoplasmic reticulum - Answers B. mitochondria
Which of the following types of epithelia has cells that are flat on the surface but cuboidal in the basal
layer?
A. Pseudostratified columnar
B. stratified cuboidal
C. stratified squamous - Answers C. Stratified squamous
The basal lamina is composed of glycoproteins (laminin and entactin) and...
A. Type I collagen
B. Type II collagen
C. Type III collagen
D. Type IV collagen - Answers D. Type IV collagen
All the following statements about an epithelium are TRUE EXCEPT ONE. Which one is the EXCEPTION?
A. Is avascular
B. Has a free surface
C. Has a limited capacity for cells to divide
, D. Has nerve fibers
E. Has no or very little extracellular material - Answers C. has a limited capacity for cells to divide.
A free surface specialization that moves mucous in the trachea is the..
A. Basal lamina
B. cilia
C. microvilli
D. stereocilia - Answers B. cilia
Which type of gland is associated with a blind sac for a lumen?
A. acinar
B. tubular
C. unicellular - Answers A. acinar
The cells that line the acinar portion of a gland are most likely to be classified as:
A. cuboidal epithelium
B. fibroblasts
C. masts
D. squamous epithelium - Answers A. cuboidal epithelium
The type of gland which has no duct is the
A. endocrine gland
B. exocrine gland - Answers A. endocrine
The intercellular connection or junction that binds an epithelial cell to the basal lamina is termed:
A. anchoring junction
B. desmosome
C. hemidesmosome
D. tight junction - Answers C. hemidesmosome
Connexons are a part of what type of intercellular junctions?