bios 225 practice exam 2

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bios 225 practice exam 2

• based on BIOLOGICAL level or org, physiology can be subdivided into the following

EXCEPT

–Answer evolutionary physiology and applied physiology.

• Biological organization physiology subdisciplines

–Answer molecular/cellular systems organismal ecological (not evolutionary!) integrative ( not applied!)

• there are more than 200 different cell types in the body. cells/tissues can be categorized into

four major groups based on this classification, which of the following is NOT of these four major cell types?–Answer tumor cells!

• 4 major cell types

–Answer muscle, epithelial connective tissue neurons

• All of the following are lipids except

–Answer

• steroids
• cholesterol
• PI (4,5)P2 1 / 3

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• sucrose

–Answer obviously sucrose=carbohydrate

• what are steroids, cholesterol, and PI(4,5)P2 ?

–Answer steroids –Answer four fused rings, unusual for lipid cholesterol –Answer most common steroid

PI(4,5)P2

–Answer phospholipid component of cell membranes

• In terms of positive and negative feedback loops, which of the following is not like the

others?

• maintaining internal body temp
• eating when hungry
• receptor adaption
• parturition (birth)
• maintaining blood pressure

–Answer parturition (positive feedback loop with uterus distortion)

• what is receptor adaption and why is it not positive feedback?

–Answer for sustained stimulus, receptor neuron will fire less and less frequently (adaption).

• Ach esterase/AChE/acetylcholinesterase is most likely to be found in what region of a

neuron?–Answer signal transmission

• Vesicles that are produced by the ER-Golgi network may be released from the cell using the 2 / 3

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process of –Answer exocytosis

• pinocytosis

–Answer water moves INTO cell. fluid endocytosis

• Which of the following statements is true?
• one of the most important physiological principles is

–Answer genotype is the sole determinant of phenotype; one genotype --> one phenotype

• the somatosensory system is essential for the homeostasis of body tem- perature
• physiological processes function separately from physical and chemical laws
• conformers maintain relatively constant internal conditions regardless of external conditions

–Answer very obvious one –Answer

• the somatosensory system is essential for the homeostasis of body temperature
• NaKATPase transports ions across the membrane via the mechanism of
• passive diffusion
• facilitated diffusion
• secondary active transport
• gated pore
• none of the above answers is correct

–Answer

• none of the above.

uses ATP, so PRIMARY active transport.

• "gated pore"
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