Refer to the accompanying figure. The type of neuron labeled as 1 is a(n):
a. motor neuron.
b. pyramidal neuron.
c. sensory neuron.
d. efferent neuron.
e. interneuron.
c
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What do the two sets of neurons damaged in Charcot-Marie-Tooth neuropathy comprise?
Charcot-Marie-Tooth is the most commonly inherited peripheral neuropathy, and has no known cure. Patients suffer damage to motor and sensory neurons, leading to degeneration of muscles and gradual loss of motor control. A. peripheral nervous system B. autonomic nervous system C. somatic nervous system D. parasympathetic nervous system E. central nervous system
In Müllerian mimicry a defenseless species is protected by its resemblance to a dangerous species. Indicate whether the statement is true or false
Motor proteins use the energy in ATP to transport organelles, rearrange elements of the cytoskeleton during cell migration, and move chromosomes during cell division
Which of the following mechanisms is sufficient to ensure the unidirectional movement of a motor protein along its substrate? (a) A conformational change is coupled to the release of a phosphate (Pi). (b) The substrate on which the motor moves has a conformational polarity. (c) A conformational change is coupled to the binding of ADP. (d) A conformational change is linked to ATP hydrolysis.
During _______________, the nuclear envelope disappears, and the chromosomes become distinct.
a) telophase. b) metaphase. c) interphase. d) anaphase. e) prophase.