BIO 203_11 exam 1 (v0) post

BIO 203_11 exam 1 (v0) post - BIO 203 Exam 1 Choose The...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 203 - Exam 1 Choose the INCORRECT answer 2/28/11 page 1 1) Organization of Complex Biological Organisms a) In a complex organism, individual cells obtain vital substances directly from the interstitial fluid. b) A group of cells of different types that perform a specific function is referred to as a tissue. c) Biochemical substances comprise 0.25% of the molecules in the human body. d) The production of ATP by anaerobic metabolism is fast but inefficient compared to aerobic metabolism. Use this figure to answer the following question. 2) Water and Ion Balance a) Organisms A and C must be ionoregulators and organism B must be an ionoconformer. b) The extracellular fluid osmolarity is the same in all three organisms (A, B and C). c) Of the three organisms, B is most likely an osmoconformer. d) Based on the information provided in the graph, it is not possible to determine which of these organisms is/are stenohaline. 3) Transport Epithelia a) Transport epithelia have an asymmetrical distribution of ion transporter proteins in the apical and basolateral membranes. b) The movement of ions across a layer of transport epithelial cells usually occurs via transcellular transport, whereas water transport usually occurs via paracellular transport. c) Chloride cells in the gills of fresh water fish transport Cl - into the ECF from the water, whereas in salt water fish chloride cells pump Cl - out of the animal. d) As salmon begin the process of smoltification, a number of ion pumping processes are remodeled including a marked increase in the number of epithelia cells in the gills that express the NKCC transporter protein. 4) Water and Ion Balance a) A small desert mammal (e.g. a kangaroo rat) can minimize water loss by temporarily suspending thermoregulation and allowing its body temperature to fluctuate. b) Temperature regulation can have a significant impact on water and ion balance, particularly for terrestrial endotherms. c) A mammal that primarily eats marine invertebrates needs to excrete more salts than a mammal that eats primarily marine fish. d) The storage of urea in tissues is an effective strategy to minimize water loss.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
BIO 203 - Exam 1 Choose the INCORRECT answer 2/28/11 page 2 5) Osmolarity and tonicity a) A red blood cell that is placed in an isotonic solution will neither increase nor decrease in size. b) Stating that an aqueous solution is hyperosmotic is equivalent to saying it is hypertonic. c) The concentration of water in a hypotonic aqueous solution is greater than the concentration of water in the ICF of a red blood cell. d) Osmosis is a colligative property of a solution and depends on the concentration of the solute but not on the nature of the solute. 6) Passive Transport Through Membranes
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/21/2011 for the course BIO 203 taught by Professor Johncabot during the Spring '08 term at SUNY Stony Brook.

Page1 / 6

BIO 203_11 exam 1 (v0) post - BIO 203 Exam 1 Choose The...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online