The chemical bonds of carbohydrates and lipids have high potential energy because:
A. they are strong oxidizing agents.
B. they are strong reducing agents.
C. their electrons are far away from the nuclei
of the atoms.
D. they are easy to phosphorylate.
E. they are easy to hydrolyze.
C
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Thermoreceptors consist of ____
a. sensory receptors enclosing an afferent neuron b. sensory receptors formed by a cell that synapses with an afferent neuron c. free nerve endings of afferent neurons d. stereocilia
e. statocystsWhich is a characteristic of parasites?
a. They are indiscriminate in their choice of host. b. They inflict serious injury and kill their host. c. Some reside inside their host, whereas others live outside their host. d. Parasitic hosts are always animals. e. They rarely harm their host.
The stalk that supports the individual eudicot leaf is the ____
a. collenchyma b. petiole c. node d. sclereid e. peduncle
Which of the following statements is TRUE?
a. Ion channels are primarily composed of fatty acids. b. Usually both sodium and potassium can move through the same ion channel. c. Membranes are usually slightly positively charged on the inside. d. The electrical gradient in most cells tends to push K+ out of the cell, through open channels. e. Channel gating can be regulated by the membrane potential.