Exam Ch 3-6 (review ?’s) Flashcards
Because they are embedded within the membrane, ion channels are examples of ___.
Integral proteins
Diffusion of substances within a solution tends to use the substances ___ their ___ gradient.
Down, concentration
Ion pumps and phagocytosis are both examples of ___. 
Endocytosis
Diffusion is to ___ as endocytosis is to ___.
Filtration, phagocytosis
Cytoplasm is to cytoskeleton as a swimming pool containing chlorine and flotation toys is to ___ ___.
The water
Which of the following is a function of the rough ER?
A. Production of proteins
B. Detoxification of certain substances
C. Synthesis of steroid hormones
D. Regulation of intracellular calcium concentration
A. Production of proteins
Which of the following is a feature common to all three components of the cytoskeleton?
A. They all serve to scaffold the organelles within the cell
B. They all are characterized by roughly the same diameter
C. They are all polymers of protein subunits
D. They all help the cell resist compression and tension
C. They are all polymers of protein subunits
What materials can easily diffuse through the lipid bilayer, and why?
Only materials that are relatively small and nonpolar can easily diffuse through the lipid bilayer. Large particles cannot fit in between the individual phospholipids that are packed together, and polar molecules are repelled by the hydrophobic/non-polar lipids that line the inside of the bilayer.
What do osmosis, diffusion, filtration, and the movement of ions away from like charge all have in common? In what way do they differ?
They describe the movement of substances down a particular type of gradient. Osmosis and diffusion involve the movement of water and other substances down there concentration gradient respectively. Filtration describes the movement of particles down a pressure gradient, in the movement of ions away from like charge describes their movement down there electrical gradient.
What separates the base pair at the start of DNA replication?
Helicase (enzyme)
In observing epithelial cells under a microscope, the cells are arranged in a single layer and look tall and narrow, and the nucleus is located close to the best Saul side of the cell. The specimen is what type of epithelial tissue?
A. Columnar
B. Stratified
C. Squamous
D. Transitional
A. columnar
Which of the following is the epithelial tissue that lines the interior of blood vessels?
A. Columnar
B. Pseudostratified
C. Simple squamous
D. Transitional
C. Simple squamous
Which type of epithelial tissue specializes in moving particles across its surface?
A. Transitional
B. Stratified columnar
C. Pseudostratified chili tasted columnar
D. Stratified squamous
B. Stratified columnar
Connective tissue is made up of which three essential components?
Cells, ground substance, protein fibers
Which connective tissue specializes in storage of fat?
Adipose tissue