This figure shows a cross section of the spinal cord. What structure does number 3 indicate?
A. Posterior funiculus
B. White commissure
C. Anterior funiculus
D. Lateral funiculus
E. Anterior median fissure
D
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The “pacemaker” for the heart is usually the:
a. sinoatrial node b. Purkinje fibers c. bundle of His d. atrioventricular bundle
Which of the following best describes a nucleosome?
a) a short stretch of DNA partly wrapped around a spool of histones b) an mRNA molecule and many attached ribosomes c) a group of nucleoli in the nucleus where ribosomes are produced d) a tRNA molecule and its appropriate amino acid
The intermediate mass
A. is a point of communication for the thalamus. B. passes through the third ventricle. C. is composed of gray matter. D. All of the above
The spinous processes of the sacral vertebrae fuse to form the
A) median sacral crest. B) lateral sacral crest. C) sacral hiatus. D) sacral canal. E) sacral tuberosity.