Stabilized natural selection

Favor intermediate phenotype but eliminate lower and higher-grade phenotype

It introduced homogeneity in the population

Exp - clutch size of birds that lay too many or too few eggs per nest have lower fitness values than do those that lay an intermediate number of eggs

TLS Online TPP Program

#Id: 4028

#Unit 7. System Physiology – Animal

TLS Online TPP Program

#Id: 4029

#Unit 7. System Physiology – Animal

The effects of the autonomic nervous system on heart rate are called chronotropic effects

TLS Online TPP Program

#Id: 4030

#Unit 7. System Physiology – Animal

Positive chronotropic effects are increases in heart rate.

TLS Online TPP Program

#Id: 4031

#Unit 7. System Physiology – Animal

Negative chronotropic effects are decreases in heart rate.

TLS Online TPP Program

#Id: 4032

#Unit 7. System Physiology – Animal

Stimulation of the sympathetic cardiac nerves speeds the depolarization in SA node.

TLS Online TPP Program

#Id: 4034

#Unit 7. System Physiology – Animal

The rate of spontaneous discharge increases Norepinephrine secreted by the sympathetic endings binds to β1 receptors