Which is not correct regarding the spleen?
A. Its white pulp consists of lymphatic cells.
B. It has an outer cortex and inner medulla.
C. It is divided into sections by capsular extensions called trabeculae.
D. Its blood is supplied by the splenic artery and drained by the splenic vein.
E. It stores erythrocytes.
Answer: B
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The action of the rhomboid major muscle is to
A) depress and protract the shoulder. B) adduct and rotate the scapula downward. C) abduct the scapula. D) elevate the scapula. E) All of the answers are correct.
Which of the following is the most important role of meiosis in sexual reproduction?
A. It changes the genetic composition of each chromosome. B. It produces at least one gamete that is mobile. C. It ensures that each daughter cell doubles the number of chromosomes. D. It prevents the chromosome number from doubling in each generation. E. It reduces the size of the gametes.
What is the main component of the A band of the myofibril?
A) Elastic filaments B) Actin filaments C) Thin filaments D) Thick filaments
What blood vessel carries blood from the aorta into the kidney?
A) hepatic artery B) renal artery C) renal vein D) glomerulus