All of the following items are composed of matter except which one?
A. All of the answer choices have matter.
B. The air we breathe
C. The fumes emitted from a vehicle
D. The steam formed from boiling water
Answer: A
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Predict what might happen to peripheral resistance in arterioles supplying skeletal muscle when pH levels drop.
A. Vasoconstriction in vessels supplying skeletal muscle B. Vasodilation in vessels supplying digestive viscera C. Vasodilation in vessels supplying skeletal muscle D. No change in the skeletal muscle vessels
Which of the following hormones passes the blood brain barrier and is converted to estradiol?
a. testosterone b. androgen c. aromatase d. estrogen
Which of the following statements is part of Starling's law of the heart?
a. a slightly larger and better-contracting heart will increase stroke volume b. the greater the ventricular stretch, the more forceful the contraction c. an increase in venous return will increase blood flow into the heart d. all of the listed responses are correct
Of the following muscles of the thigh, which one has its origin on the ischial tuberosity and inserts on the medial surface of the tibia?
A) semitendinosus B) gracilis C) semimembranosus D) biceps femoris