Human populations can exist at equilibrium densities in one of two ways:

1. High birth and high death rates

2. Low birth and low death rate

TLS Online TPP Program

#Id: 5454

#Unit 7. System Physiology – Animal

The basis for the relative refractory period is the higher K+ conductance than is present at rest. 

TLS Online TPP Program

#Id: 2456

#Unit 13. Methods in Biology

The term electrophoresis describes the migration of a charged particle in medium (buffer/liquid) under the influence of an electric field.

TLS Online TPP Program

#Id: 9881

#Unit 4. Cell Communication and Cell Signaling

Defensins and cathelicidin LL-37 are secreted constitutively by epithelial cells in many tissues, and are stored as well in neutrophil granules, where they contribute to killing phagocytosed microbes.

TLS Online TPP Program

#Id: 6340

#Unit 8. Inheritance Biology

X-linked characteristic Characteristic determined by a gene or genes on the X chromosome.  Y-linked characteristic  Characteristic determined by a gene or genes on the Y chromosome. The locus for the blue pigment is found on chromosome 7, and those for the green and the red pigments lie close together on the X chromosome.

TLS Online TPP Program

#Id: 10099

#Unit 4. Cell Communication and Cell Signaling

Adherens junctions

functions as a tension cable that can internally brace the cell and thereby control its shape