Cellular transport processes
Which of the following allows water to move much faster across cell membranes?
Aquaporins
In adults, new connective tissue cells originate from the ________.
mesenchyme
The cells responsible for the transmission of the nerve impulse are ________.
neurons
After a skin injury, the body initiates a wound-healing response. The first step of this response is the formation of a blood clot to stop bleeding. Which of the following would be the next response?
increased production of connective tissue
Long bones enable body movement by acting as a ________.
lever
The cell membrane is composed mainly of _________.
phospholipids and proteins.
Where in the body are you most likely to find a basal cell carcinoma?
Areas exposed to long-term UV radiation such as the head, neck, arms, and back.
Which structure is the site of the synthesis of proteins that may be exported from the cell?
Rough ER
The cells of muscles, myocytes, develop from ________.
myoblasts
In bone, the main cells are ________.
osteocytes
Why do humans produce carbon dioxide?
Carbon dioxide is a waste product of making ATP
The papillary and reticular layers of the dermis are composed mainly of ________.
connective tissue
A cell with a predominance of free ribosomes is most likely ________.
primarily producing proteins in the cytosol
Spherocytosis is a human blood disorder associated with a defective cytoskeletal protein in the red blood cells (RBCs). What do you suspect is the consequence of such a defect?
Abnormally shaped RBCs
What is found in compact bone and cancellous bone?
lacunae
Which of the following is a feature that distinguishes active transport from facilitated diffusion?
Requirement for metabolic energy
What characterizes inflammation?
Localized heat
Swelling
Pain
Redness
Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle must be involved in this condition?
The lysosome
Striations, cylindrical cells, and multiple nuclei are observed in ________.
skeletal muscle only
What is the best explanation for the presence of canaliculi in compact bone?
They are used by osteocytes to relay waste products and obtain nutrients
Which form of endocytosis is nonspecific, in that it occurs by the formation of an invagination of the plasma membrane, which then fills with interstitial fluid of the immediate area?
Pinocytosis
Which of the following do you expect to find in the papillary layer of the dermis (select all that apply).
Sensory structures
Capillary loops
Dense regular connective tissue
Loose areolar connective tissue
Sensory structures,
Capillary loops,
and
Loose areolar connective tissue
Why are unsaturated lipids liquid at room temperature?
The C=C bond decreases how tightly molecules can pack together
Which type of epithelial tissue specializes in moving particles across its surface?
pseudostratified ciliated columnar
what is only found in cancellous bone?
trabeculae