What important event does NOT occur in the second week of development?
A. HCG is secreted to maintain the corpus luteum.
B. Implantation begins.
C. The embryonic disk is formed.
D. The heart develops.
Answer: D
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The vein that drains immediately into the femoral vein is the ________ vein.
A. common iliac B. posterior tibial C. great saphenous D. anterior tibial E. small saphenous
The combining of a series of twitches to produce a more forceful contraction is called ________.
Fill in the blank(s) with the appropriate word(s).
A function of tropomyosin is
a. to bind Ca2+ b. to form attachments with myosin cross bridges c. to prevent myosin cross bridges from attaching to the thin filaments d. to act as an ATPase e. none of the above
The tidal volume:
a. is the volume normally entering or leaving the lungs during a single breath. b. is the maximum volume that can be moved in or out during a single breath. c. is the maximum volume the lungs can hold. d. is the minimum volume the lungs can hold. e. none of these answers.