Phenotype

4 important questions on Phenotype

How do the salmon cope with the physiological callenges in the sea? name 4

Nacl pump -> active salt excretion, increased vasopressin, increased water retention in the kidneys, concentrated urine

What triggers the salmon back to fresh water (homing) and how does the salmon finds its way back?

-reproduction, triggered by the environment
-navigation in the sea through the sun and magnetic fields

-it finds it way back through chemical signals affecting the olfactory system and hypothalamus (olfactory imprinting when it was young)

How is the transition from salty to fresh water for homing salmons?

-brakish water: osmotic adaptation, decreased NaCl, sensed by chemoreceptors
-reduced drinking
- decreased vasopressin, water retention in the kidneys and diluted urine
-NaCl pump: increased active salt retention
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

What about the food intake of the homing salmon back in the river before spawning?

no more food intake! energy reserves from the fat storage.
stomach degeneration, more room for the sperm/eggs

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo