What is the purpose of the cartilage rings in the trachea?
A) to prevent food from passing into the trachea
B) to assist with contracting the trachea
C) to produce mucus to trap debris
D) to keep the trachea open
Answer: D) to keep the trachea ope
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Contact inhibition is an important mechanism for maintaining cell growth in developed organs and tissues. As long as
the cells maintain contact with each other, they remain in ____ and are prevented from dividing.
a. prophase b. G1
c. G2 d. G0 e. S
The enzyme that forms a transport channel in the inner membrane of the mitochondria and uses the potential energy of the proton gradient to form ATP is the
A. FADH2 synthase. B. hydrogen synthase. C. NADH synthase. D. ADP synthase. E. ATP synthase.
Select the feature which is involved in the clotting process.
A. Platelets B. Fibrin C. Both platelets and fibrin D. Neither platelets nor fibrin are involved in the clotting process
The body of a bilaterally symmetrical animal can divided into two equivalent halves by more than one plane
____________________ Indicate whether the statement is true or false.