42.3 How does body size affect animal physiology?
Physical laws affect body size
Body size has pervasive effects on how animals function
Surface Area/Volume Relationships: Theory
Surface area is important in animals because oxygen and nutrients such as gl
Biology 220 Winter 2013
Water transport from bottom to top
How do plants move water from the roots to
the top of shoots?
Water movement water potential
Water potential (, psi, units megapascals
MPa): potential energy of water in a
particular environment c
NOTE: you are responsible for lecture and lab material.
These questions were written specifically to help you prepare for tests. They promote straightforward memorization
as well as an understanding of the system(s) involved in
Biology 220 Week One Study Questions
1. Of the features that define plants, which are shared with other groups of organisms?
If you encounter an organism that is terrestrial, green, non-mobile, and has cell walls, would you
consider it a plant? Why or why
October 11th, 2016
If the nociceptor is generating action potentials, how does the message travel to brain?
Synapses with another neuron (shots up the neurotransmitter across the synapse)
First trigger zone on first neuron: nociceptors or thermoreceptor
Wilting (Water and Mineral Uptake)
Cha 38.2 & 39.3 (pg. 759 761 stop before Water Movement via Root Pressure, pg. 782-787
November 1st, 2016
How Does Water Move from Roots to Shoots?
Water moves into root cells by osmosis
Water transported to shoots (mutu
September 28th, 2016
What determines how much we weigh?
- Culture(foods) diet
- Brain hunger center
- Muscle vs fat (distribution): muscle weighs more than fat
- Predict what will hap
Muscles and movement
1. What is a motor unit? What is recruitment?
Motor unit - made up of a motor neuron and the skeletal muscle fibers innervated by that axon. Groups of motor units often work
together to coordinate the contractions of a single muscle.
A young actively dividing cell (can be found in growing tissues, such as the
A mature cell
Where are the organelles?
Stores ions (K+, Cl-, Ca2+),
organic acid, sugars,
1. A rare Antarctic ice-
fish has been discovered. It is perfectly spherical with a radius of 1 mm. It
does not have a circulatory system for delivering oxygen to its tissues and depends solely on
21 November 2011
1. The concepts of physiology are based on exchange of materials between organisms and their
environment. These fluxes are similar in principle between animals and plants, although some major
Biology 220 Exam 4
March 18th, 2009
Write your name of every page of the exam.
Exams will be available for pickup in room 318 HCK