Inorganic chemists study substances ________ carbon, while organic chemists study substances ________ carbon.
A. lacking; containing
B. containing more than 1 mole of; with less than a mole of
C. containing; lacking
Answer: A
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Which is true about mediated transport across cell membranes?
A. As the concentration gradient across a membrane increases, the transport rate always increases. B. It refers both to simple diffusion and to the active transport of molecules. C. It is nonspecific; any transporter can transport any molecule across the cell membrane. D. It is characterized by saturable carriers and a maximum velocity of transport. E. It refers to the movement of ions through protein channels.
The ________ is the inner lining of the uterus
A) endometrium B) epimetrium C) perimetrium D) myometrium E) exometrium
The contractile organelles of a skeletal muscle fiber are thread-like structures called
a) myofibrils. b) myoglobin. c) mitochondria. d) Z discs. e) M lines.
Match the type of breathing with its description.
1. cessation of breathing 2. increased respiratory rate and/or volume without increased metabolism 3. increased respiratory rate and/or volume due to increased metabolism 4. rapid breathing 5. difficulty breathing A. hyperpnea B. hyperventilation C. tachypnea D. dyspnea E. apnea