In septate fungi, what structures allow cytoplasmic streaming to distribute needed nutrients, synthesized compounds, and organelles throughout the hyphae?
A) multiple chitinous layers in cross-walls
B) pores in septa
C) complex microtubular cytoskeletons
D) two nuclei
E) tight junctions that form in cross-walls between cells
Answer: B
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A __________ is a term given to a macromolecule
(large molecule) made up of individual subunits. Fill in the blank(s) with the appropriate word(s).
Class II MHC are found on
A) the skin. B) red blood cells. C) cytoplasmic membranes of nucleated cells. D) muscle cells. E) professional antigen-presenting cells.
All of the following pertain to fever EXCEPT that it
A) accelerates microbial growth by increasing iron absorption from the digestive tract. B) stimulates T lymphocyte activity. C) is caused by interleukin-1 and TNF-alpha coming into contact with the hypothalamus. D) intensifies the effect of antiviral interferons. E) can be initiated by specific types of pathogens.
The hormones epinephrine and norepinephrine constitute the "alarm" response of the body to stress. What organ secretes these hormones?
A. Pineal gland B. Adrenal medulla C. Thyroid gland D. Anterior pituitary gland E. Pancreas