Cells that produce _____________ have a relatively low amount of smooth endoplasmic reticulum and a relatively high amount of rough endoplasm's reticulum.
a. triglycerides
b. glycogen
c. digestive enzymes
d. steroid hormones
Answer: c. digestive enzymes
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In humans, nitric oxide is an important gaseous neurotransmitter. Nitric oxide is synthesized by three isoforms of nitric oxide synthase (NOS). What would be a likely effect if a male were missing the gene that codes for one of the NOS isoforms?
A. He would be unable to produce all the liquid components of semen. B. He would have high levels of mutation within his mature sperm. C. He would have difficulty getting and/or sustaining an erection. D. He would have a low sperm count due to decreased spermatogenesis.
The rate of decomposition is faster for proteins, simple sugars, cellulose, and hemicellulose than it is for lignin
Indicate whether the statement is true or false
Schleiden and Schwann stated the "cell theory," which in its modern form says:
A. all cells will arise spontaneously, all cells require oxygen and all cells are composed of one or more cells. B. all organisms are composed of one or more cells, all cells arise spontaneously and all cells vary in size and shape. C. all organisms are composed of one or more cells, all cells require oxygen and all cells arise by division of other cells. D. all organisms are composed of one or more cells, all cells are the smallest living things and all cells arise by division of other cells.
This structure of the brainstem is poorly defined, but consists of approximately 100 nuclei. It functions as a passageway for signals to and from the brain, and projects to the forebrain (cerebrum + diencephalon), cerebellum, and brainstem.
a. Midbrain b. Pons c. Medulla d. Reticular formation