Which of the following is a characteristic of facilitated diffusion (passive transport) of a molecule across a membrane?
A) Its rate is higher than that of simple diffusion of the molecule.
B) It is highly specific for the molecule being transported.
C) The direction of transport is determined by concentration and/or electrochemical gradients.
D) The rate of transport is saturable.
E) All of the above are true.
Answer: E
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The kneecap is the:
a. hyoid b. patella c. scapula d. clavicle e. phalanx
Lyell’s theory of uniformity proposed that ____
a. Earth was shaped by gradual, repetitive change b. catastrophic geological events caused extinctions c. geologic events that occurred to shape Earth no longer occur d. all populations produce more offspring than their environment can support e. natural selection drives evolutionary change
When bacterial cell walls are covered with an outer membrane that contains lipopolysaccharide, they are
A. polyencapsulated. B. gram-negative. C. gram-positive. D. encapsulated.
With endurance training all can occur EXCEPT
a) Increased capillary density b) Increased myoglobin c) Increased max heart rate d) Increased mitochondria