In the adult pancreas, the beta, alpha, delta, and F cells are

A) stem cells.

B) progenitor cells.

C) differentiated cells.

D) blood cells.


C) differentiated cells.

Biology & Microbiology

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The process of 'crossing over':

a. generally results in binary fission b. involves nucleoli c. involves breakages and exchanges being made between sister chromatids d. involves breakages and exchanges being made between homologous chromosomes e. involves random assortment of homologues during metaphase

Biology & Microbiology

Which of the following statements is false?

a. Synaptic potentials may vary in magnitude. b. Synaptic integration sums arriving signals over space and time. c. An excitatory postsynaptic potential is hyperpolarizing, whereas an inhibitory postsynaptic potential is depolarizing. d. Synaptic integration means that signals arriving at a neuron can be reinforced or dampened. e. Synaptic integration means that signals arriving at a neuron can be sent on or suppressed.

Biology & Microbiology

What type of immunity results from recovery from an infection such as the chickenpox?

a. naturally acquired active immunity b. naturally acquired passive immunity c. artificially acquired active immunity d. artificially acquired passive immunity

Biology & Microbiology

Describe the interactions between genes and the environment in the sex determination of some reptiles; explain their relevance to human sex determination

What will be an ideal response?

Biology & Microbiology