Which of the following statements is true concerning sonic muscles?
A) They contract at much higher frequencies than the locomotor muscles found in the same organism.
B) They utilize completely different muscle proteins.
C) They have a very slow rate of cross-bridge cycling.
D) They are able to contract rapidly while producing large amounts of force.
Answer: A
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Blood drains from the peritubular and vasa recta capillary beds into small veins. Which is the smallest of these veins (also called the interlobular veins)?
A) renal vein B) segmental veins C) cortical radiate (also called interlobar veins) D) arcuate veins
Using Figure 14.1, match the following:
1) Myelin sheath.
2) Cell body of ANS preganglionic neuron.
3) Cell body of ANS postganglionic neuron.
4) Cell body of the somatic neuron.
Ribosomes are composed of protein and
A) rRNA. B) mRNA. C) tRNA. D) DNA. E) mDNA.
Which artery is missing in the following sequence?Tracing the blood from the heart to the right hand, blood leaves the heart, passes through the ascending aorta, aortic arch, right subclavian artery, axillary and brachial arteries, either the radial or ulnar arteries and palmar arches to arrive at the hand.
A. Cephalic B. Left subclavian artery C. Jugular D. Brachiocephalic E. Right common carotid