Which is a form of energy that is generally unavailable to do any work?
A. Heat
B. Kinetic energy
C. Radiant energy
D. Sound energy
E. Mechanical energy
A
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Which of the following is an example of a nonmembranous organelle?
A) nucleus B) cilia C) endoplasmic reticulum D) peroxisomes E) mitochondria
Examination of a tissue sample from the central nervous system reveals many darkly pigmented cells. This tissue probably came from the
A) nucleus gracilis. B) nucleus cuneatus. C) motor cortex. D) substantia nigra. E) red nucleus.
The term ________ refers to a membrane that allows some things to pass through it, but not others
A) glycocalyx B) selectively permeable C) phospholipid bilayer D) specificity E) carrier-mediated
Cerebrospinal fluid is formed by the
A. choroid plexus. B. arachnoid villi. C. arachnoid granulation. D. septum pellucidum. E. mesencephalic aqueduct.