11b. Excretion

module 11
week 14
osmoregulation
excretion
We are all slightly salty bags of water in the environment
Author
Affiliation

School of Life Sciences, University of Hawaii

Published

December 3, 2024

Pre-class materials

Letʻs finish strong!
  • Two more content discussions, then final student presentions.
  • Everyone is so excited to watch your final presentations. Please sign up for a [presentation time]
  • Attendance is mandatory at all remaining classes.
  • Come prepared by reading the book, and our discussions can probe deeper. This will make your homeworks, labs, and papers so much easier.
  • Remember that effort counts, and will be taken into account in the final grades. If your grade is on the borderline, effort will translates into a “bump up”. You show effort in many ways, including attendance and sincere participation.

Announcements/Reminders

  • Osmoregulation homework due Thursday at start of class. Last one! [schedule].
  • [Design 3 final] due Friday by midnight.
  • Please do TEAMMATES after Thursday.
  • Last lab this week! Prepare for the Human Renal Lab starting from the night before lab. [lab 12]
  • Design 4 is posted [suggestions] or feel free to pursue your own interests and design your own project! Due the week of finals.

Week 14/15 Discussion Groups

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

Tuesday

  • Welcome back from Thanksgiving!

  • [Excretion questions] [slide deck 1] [slide deck 2]

  • Reading assignment: Withers skim pp. 841-845 (pick up the four main steps of Tubular Excretion),read 855- 874 (Vertebrate Kidneys) and pp. 874-886 (Nitrogen Metabolism) or HWA pp.754-776, 782-785.

  • Nitrogenous waste comes from protein metabolism. Think about nitrogenous waste (osmoreg question 5) and what mechanisms organisms have for their excretion (excretion questions 1,2)

Table 1: Organs involved in osmoregulation
Group
Fish Kidneys Gills Bladder Intestines
Amphibians Kidneys Gills Bladder Intestines Skin
Reptiles Kidneys Intestines (Salt Glands)
Birds Kidneys Intestines (Salt Glands)
Mammals Kidneys

Osmoregulation Podcast

Thursday

  • Bird and Reptile Excretion! We will have a fascinating discussion on reptile and bird excretion [notes]

Next Week

  • Begin Final Presentations