Which of the following phenomena produces magnification?
A) the wavelength of a radiation source
B) the refraction of radiation as it passes through a lens
C) the thickness of a microscopic specimen
D) the numerical aperture of a lens
E) the length of an objective lens
B
Bloom's Taxonomy: Comprehension
Section: Microscopy
Learning Outcome: 4.6
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Which bacterial genus is LEAST related to the others listed?
A) Actinomyces B) Mycobacterium C) Nocardia D) Streptomyces
Identify the point in time during an action potential when a positive feedback process is occurring in a neuron.
A. when the neuron is at rest B. as the neuron is being depolarized and passes the threshold potential C. after the peak depolarization of the action potential when it is rapidly repolarizing D. during the undershoot phase when the neuron is slightly hyperpolarized relative to the resting potential E. A positive feedback process is occurring at all the time points given.
Which component of a nerve cell provides electrical insulation for signals that are travelling along the axon?
a. astrocytes b. dendrites c. oligodendrocyte d. soma
There are phalanges in both the lower limbs and upper limbs.
Answer the following statement true (T) or false (F)