Testosterone is converted to DHT by 5α-reductase in some target cells, and DHT binds to the same intracellular receptor as testosterone

TLS Online TPP Program

#Id: 8287

#Unit 1. Molecules and their Interaction Relevant to Biology

The relationship between activation energy and the rate constant of the reaction, k, is given by the Arrhenius equation

Arrhenius equation

TLS Online TPP Program

#Id: 4243

#Unit 12. Applied Biology

For optimal cell growth, a constant temperature of 370C and 5–10% CO2 is required for incubators to maintained physiological pH (usually pH 7.2–7.4). 

TLS Online TPP Program

#Id: 9405

#Unit 11. Evolution and Behavior

Costs & benefits of territorial defense

Cost

Defending a territory requires time & energy and may, if aggressive defense is  needed, may pose some risk of injury.

Benefits‐

The improved access to resources represents  the 'benefit(s)' of territory defense.

TLS Online TPP Program

#Id: 5554

#Unit 7. System Physiology – Animal

There are two types of intercalated cells: type A and type B

TLS Online TPP Program

#Id: 7027

#Unit 11. Evolution and Behavior

Proximate causes - The subject of cell biology, neurobiology, and many other biological disciplines

Ultimate causes - Their historical causes, especially the action of natural selection