An essential amino acid
A. can be formed from fats in the body.
B. can be synthesized by the body if there is enough nitrogen.
C. must be made from glucose.
D. must be supplied in the diet.
E. can not be converted to nonessential amino acids.
D
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________ consists of fibers that are oriented in multiple directions, and is found in the joint capsules and the deep layer of skin.
A. Areolar connective tissue B. Reticular tissue C. Dense regular connective tissue D. Dense irregular connective tissue
Creatine phosphate
A. supplies energy for the breakdown of ATP to ADP. B. causes the decomposition of ATP. C. causes the decomposition of ADP. D. supplies energy for the synthesis of ATP.
All molecules greater than 0.8 nm in diameter are unable to penetrate the plasma membrane unless there is a carrier for the molecule
Indicate whether the statement is true or false
. SA nodal cells are autorhythmic
Indicate whether this statement is true or false.