Which statement is TRUE regarding complete proteins?
A) Complete proteins can be synthesized from carbon skeletons.
B) Complete proteins lack one or more essential amino acids.
C) Complete proteins can only be obtained from animal proteins.
D) Complete proteins provide all of the essential amino acids.
Answer: D
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The microscope of choice for a detailed three-dimensional study of the surface of a specimen is the
A. scanning electron microscope. B. transmission electron microscope. C. light microscope. D. telescope.
What are the two general types of force that accomplish transport of substances across a membrane?
a. push and pull forces b. attractive and repulsive c. negative and positive d. passive and active forces e. up and down forces
Beginning inferior to the urinary bladder, sperm travel to the exterior through the urethral regions in what sequence?
a. prostatic urethra, spongy urethra, membranous urethra b. prostatic urethra, membranous urethra, spongy urethra c. membranous urethra, prostatic urethra, spongy urethra d. spongy urethra, prostatic urethra, membranous urethra
The brainstem
A. contains nuclei for vomiting and sneezing reflexes. B. includes nuclei of cranial nerves II - XII. C. contains centers for several vital reflexes like heart rate and blood pressure. D. contains the reticular formation. E. All of the choices are correct.