Why are action potentials usually conducted in one direction?

TLS Online TPP Program

#Question id: 17219

#Unit 7. System Physiology – Animal

What is the first stage of the General Adaptation Syndrome? 

TLS Online TPP Program

#Question id: 15741

#Unit 5. Developmental Biology

The region of the Y chromosome have a male-specific DNA sequence that encodes a peptide of 223 amino acids. This gene is called:

TLS Online TPP Program

#Question id: 7763

#Unit 5. Developmental Biology

Two major sources of mutation are radiation and reactive oxygen species (ROS).The reactive oxygen species hypothesis for aging postulates that 

1) Senescence results from the accumulation of DNA, lipid, and protein damage inflicted by ROS of mitochondrial origin; and

2) Mitochondria of long-lived species should produce high ROS than do mitochondria of short-lived species.

3) the capacity of mitochondria to consume ROS might distinguish long-lived species from short-lived species, rather than differences in ROS generation. 

TLS Online TPP Program

#Question id: 4571

#Unit 11. Evolution and Behavior

Evolutionary trees such as this are properly understood by scientists to be

TLS Online TPP Program

#Question id: 3686

#Unit 3. Fundamental Processes

The short strand of ........ primer is required for the replication of DNA: