2 Problem set 1

2 Problem set 1 - BILD 2, Multicellular Life ­...

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Unformatted text preview: BILD 2, Multicellular Life ­ ­Problem set #1 Page 1 1. Compare the generalized plant and animal cells on pages 100 and 101 in your text. List all of the similarities you can find and all of the differences. These features underlie many aspects of physiology in multicellular organisms. 2. a. Which of the following statements provide a teleological explanation and which provide a mechanistic explanation? i. The bones in your skeleton are rigid because they provide the structural basis for upright posture. ii. Homeostasis is maintained by negative feedback control because a negative feedback loop tends to resist change in the state of the loop's components. iii. The nervous system plays a critical role in coordinating different organs because you would die if each organ functioned on its own. iv. Functions within multicellular plants and animals can be more complicated than in unicellular organisms because cells can be differentiated into specialized tissues. v. In the condition called osteoporosis, bones become weaker because Ca2+ salts are removed from the extracellular space in the bones. b. Why do physiologists rely on mechanistic explanations and avoid teleological explanations? 3. a. What is a tissue? b. What is the relationship between tissues and organs? c. What are the functions of and the properties that distinguish each of the following tissues? i. Bone ii. Intestinal epithelial lining iii. Blood iv. Adipose tissue v. Skeletal muscle vi. Cardiac muscle 4. a. What are the major organs in the nervous system? b. What are the major cell types in the nervous system, and what is the overall function of each cell type? BILD 2, Multicellular Life ­ ­Problem set #1 Page 2 c. What are the three fundamental processes of information flow in the nervous system? What part(s) of the nervous system carry out each of these processes? d. What are the three fundamental processes of information flow in a single neuron? What part(s) of a neuron carry out each of these processes? 5. a. What is a resting potential? What kinds of cells have resting potentials? What causes a resting potential? b. What is an action potential? What kinds of cells have action potentials? What happens during an action potential? ...
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This note was uploaded on 02/18/2012 for the course BILD 2 taught by Professor Schroeder during the Spring '08 term at UCSD.

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