The mechanical force generated by a contracting muscle is called _____
a. a motor unit
b. muscle tension
c. a motor neuron
d. the energizing of myosin molecules
e. the action potential
ANSWER: b
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Which feature is not a characteristic of the tropical rain forests? a. Average rainfall of 130 - 200 centimeters
b. The most structurally complex biome. c. Photosynthesis continues year round. d. Average temperature of 92o F. e. Little variation in the length of daylight.
Which of the following statements is NOT true of the
lymph vascular system? The lymph vascular system a. transports lipids absorbed from the small intestine to the bloodstream. b. recovers and transports interstitial fluid back to the bloodstream. c. absorbs glucose from the small intestine and transports it to the brain. d. serves the body’s system of defenses against bacteria and other infectious agents. e. consists of capillaries and of vessels that are similar to veins.
Cartilage is heavier and not as pliable as bone.
a. true b. false
Lice and their relationship with mammals is an example of what type of relationship?
A. commensalism B. parasitism C. mutualism D. predator-prey relationship