________ are barrel-shaped, protein-digesting organelles in both the nucleus and the cytoplasm.
Fill in the blank(s) with the appropriate word(s).
Proteasomes
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The type of neuronal circuit in which several neurons process the same information at one time is a _____________ circuit
A. converging B. diverging C. reverberating D. parallel-after-discharge E. None of the choices is correct.
The cell membrane is composed mainly of
A. cytosol. B. phospholipids and nucleic acids. C. water. D. phospholipids and proteins. E. proteins and glycocalyx.
What is the function of the arrector pili muscle?
A. Strength B. Movement C. Nourishment D. Pigmentation
Which of the following is not true of the atria?
a. receive blood from arteries returning to the heart b. are called receiving chambers c. have thinner walls than ventricles d. all of the above are true