________ are various bacterial enzymes that dissolve fibrin clots.
Fill in the blank(s) with the appropriate word(s).
Kinases
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In cells with a normally functioning CFTR molecule, this molecule moves chloride ions (with
a negative charge) out of the cell to the covering mucus on the outside. Positively charged sodium ions then follow these chloride ions out of the cell to maintain electrical balance. This increases the total electrolyte concentration in the mucus, resulting in the movement of water out of the cell, and this water helps provide a fluid environment. People that have a defective gene (and thus a nonfunctioning CFTR molecule) produce abnormally thick and sticky mucus that builds up in the ducts and passageways. The buildup of this sticky mucus results in lifethreatening lung infections and serious digestive problems. Many charged particles such as ions cannot pass directly across the plasma membrane. Thus, passive transport of the chloride and sodium ions occurs via what process?
a. facilitated diffusion b. active transport c. bulk transport d. osmosis
Which soil region extends to the underlying bedrock, and consists of mineral particles and rock fragments but generally no organic material?
a. A horizon b. B horizon c. C horizon d. D horizon e. O horizon
Aminoacyl-tRNA synthetases link ____ to their respective tRNA molecules by ____ bonds
a. amino acids; ionic b. amino acids; hydrogen c. amino acids; covalent d. codons; covalent e. anticodons; hydrogen
The average red blood cell lives for about ________ days
A) 100 B) 150 C) 120 D) 90