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TLS Online TPP Program

#Id: 1977

Population density is the number of individuals per unit area. D=N/S  


#XL - T Zoology #Characteristics of a population (Population Density) #Part B Pointers
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TLS Online TPP Program

#Id: 9081

#XL - T Zoology

The increase in K+ permeability hyperpolarizes the membrane, which reduces the frequency of heart muscle contraction.
TLS Online TPP Program

#Id: 9082

#XL - T Zoology
TLS Online TPP Program

#Id: 9083

#XL - T Zoology

Cholera toxin, secreted by Vibrio cholerae in the intestine of an infected person, is a heterodimeric protein (AB). 
TLS Online TPP Program

#Id: 9084

#XL - T Zoology
TLS Online TPP Program

#Id: 9085

#XL - T Zoology

Subunit B recognizes and binds to specific gangliosides on the surface of intestinal epithelial cells and provides a route for subunit A to enter. 
TLS Online TPP Program

#Id: 9086

#XL - T Zoology

A1 associates with ARF6, a small G protein in host cells which are accessible only when ARF6 is in its active (GTP-bound) form.