11. Respiration-Osmoreguation

module 11
week 13
ventilation
respiration
osmoregulation
Finishing off respiration and starting osmoregulation
Author
Affiliation

Marguerite Butler

School of Life Sciences, University of Hawaii

Published

November 18, 2024

Pre-class materials

Read ahead

Before class, you can prepare by reading the following materials:

  1. Tuesday we will finish respiration and Thursday begin osmoregulation.
  2. The Symmorphosis paper is a very interesting and important paper. It will be useful for design3 respiration.
  3. In Lab this week you will measure your own brain waves using EEG. Have fun! [manual]!

Announcements/Reminders

  • Due Thursday at the start of class– Homework 5 Q1,2,5 [schedule]
  • Due Monday 11/25 at midnight - Design 3 draft
  • Please do your peer review for design 3 by Wednesday and send to colleagues and myself
  • Do discussion TEAMMATES eval, released each Friday, due by Monday.

Week 13 Discussion Groups

Group Partner 1 Partner 2 Partner 3
1 Abby Ashton Adam
2 Hao Kylee Vivian
3 Ilan Mohamad Veronica
4 James Sean Christian

Tuesday -

Aquatic Respiration, Fish Gills

  • Reading assignment: Withers Aquatic respiration: skim 565-72, read 573-4, 585-99, supplement 12-2. ALTERNATIVELY, read HWA chapter 22 + HWA 586-587 (countercurr) + HWA 590-594 (fish).
  • [discussion pg 3, Q4-5] [slide deck] [slide deck2]
  • Topics:
    • Partial pressures of gasses and pO2 at sea level - the starting point.
      • Influences of relative humidity
      • Altitude (total pressure)
      • Henryʻs Law - dissolved O2 in water
    • Flow patterns: Countercurrent vs. Concurrent
    • Fish Gills
      • Ventilatory pumps in fish (breathing patterns)
    • Root Effect

Respiratory Pumps

Finish aerial respiration questions 2, 3, 4

  • Reading assignment: Withers pp. 609-631 OR HWA chapter 23 + Withers 626-632, skip invertebrates
  • [discussion pg 4:2,3,5] [slide deck2]
  • Aerial Respiration Topics:
    • Air flow patterns of vertebrates

Respiration the Movie

Thursday - Symmorphosis

  • Reading assignment: Symmorphosis: Weibel, Taylor, and Hoppeler (1991) The concept of symmorphosis: A testable hypothesis of structure-function relationship. PNAS 88:10357-61 Respiration Papers folder
  • In class discussion

Begin Osmoregulation

  • Reading assignment: Withers skim beginning Ch. 16 for definitions in list below, also read Water & Ion Budgets pp. 788-790, Vertebrates pp. 798-803, Terrestrial Environments pp. 806-812, Terr. Verts. 822-827. Withers is actually very readable on this topic, and some of it will be familiar to you already:).
  • [discussion] [slide deck] [slide deck 2]
  • definitions:
    • solutes,
    • osmosis,
    • osmolarity/osmolality,
    • ionoregulation,
    • osmoregulation/osmoconforming,
    • compatible solutes,
    • perturbing solutes,
    • counteracting solutes,
    • osmotic permeability (&formulae)
  • The components of Water Budgets (input/output) as well as Ion Budgets
  • The water and ion challenges of freshwater, marine, and terrestrial environments

Osmoregulation Podcast

Coming up Next Week
  • We will have class on Tuesday.
  • No class on Thursday, no labs.
  • Submit your group labs to your TA by email at the regular time.
  • Happy Thanksgiving!