Under the influence of the trophoblast, maternal blood vessels in the endometrium
A) disappear.
B) attach to the inner cell mass.
C) break down and form sinuses or lacunae.
D) form a capillary network in the trophoblast.
E) increase in size and penetrate the blastocyst.
C
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The outermost covering of an entire muscle is the
A. perimysium. B. epimysium. C. endomysium. D. sarcolemma.
In early gastrulation, a depression called a blastopore forms. If this blastopore forms the anus, the animals are referred to as
A) Deuterostomes. B) Protostomes. C) Gastrostomes. D) Diploblasts.
Which of the following types of movement may NOT require use of a motor protein
A) Muscle contraction B) Flagellar movement C) Vesicle transport D) Amoeboid movement
The large fiber tract that allows communication between the two cerebral hemispheres is called the ________
A) corpus callosum B) fornix C) pons D) thalamus