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Week of April 19th lecture notes bio 100

by: Megan Hansel

Week of April 19th lecture notes bio 100 Biol 100

Marketplace > Kansas > Biology > Biol 100 > Week of April 19th lecture notes bio 100
Megan Hansel
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April 19th and 21st in class notes
Principles of Biology
Laurel Haavik, Richard Williamson
Class Notes
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This 6 page Class Notes was uploaded by Megan Hansel on Monday April 25, 2016. The Class Notes belongs to Biol 100 at Kansas taught by Laurel Haavik, Richard Williamson in Winter 2016. Since its upload, it has received 12 views. For similar materials see Principles of Biology in Biology at Kansas.


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Date Created: 04/25/16
April 19 2016 Bio 100 Clicker Question 1: When the sodium channels are opened due to voltage increase is this an example of positive or negative feedback? B. Positive Feedback Clicker Question #5: D. the membrane voltage will become >-70mV because Na+ will move into the cell Clicker Question #6: B. K+ will diffuse along its concentration gradient OUT of the cell Clicker Question #7: A Clicker Question #8: D. Clicker Question #7: c. Clicker Question: Dr. Westwood experienced numbness after eating the puffer fish meal because TXX causes: c. clicker Question #10: Why did Dr. Westwood experience paralysis after eating the puffer fish meal? B. TXX causes motor neurons to stop firing, preventing communication with the muscles, resulting in paralysis Clicker Question #13: D. Clicker Question #14: C. Prevents Na+ ions channels from closing Chemical Synapses: Synaptic cleft= a gap in between the synapse and the receiving neuron Clicker Question 15: B. Stimulate: Na+ opens; Inhibits: K+ opens Clicker question 16: B. April 21 2016 Bio 100 How do we use plants?  Clothing  Housing  Food  Fuel  Medicine Domestication of plants over 10,000 years ago 2 types of angiosperms:  Monocots and eudicots (true dicots) o How do we distinguish between these?  # of seed leaves  monocots: 1 seed leaf  dicots: 2 seed leaves  leaf veins  monocots: parallel veins  dicots: branched veins  stems  mono: vascular bundles scattered  dicots: vascular bundles in a ring  flowers  mono: multiples of 2  dicots: multiples of 4 or 5  roots  mono: fibrous root system  dicots: taproot usually present Clicker Question 1: B Clicker Question 2: A Clicker Question 3: A Clicker question 4: D Root system: (everything underground)  the way the plant attaches to the soil  absorbs nutrients and water Shoot system: (everything above ground)  contains stem  leaves  reproduction Clicker Question 5: D. Flower Clicker Question 6: B. Stem Stems modified:  stolons  asexual reproduction  tubers storage/asexual reproduction  rhizomes storage/asexual reproduction 3 types of tissue:  Dermal Tissue: o Protective outer layer o Prevents water loss  Vascular tissue: o Support and transport  Xylem  Water transport  Phloem  Sugar transport  Ground tissue: o Structure o Photosynthesis o Storage o 2 divided parts:  pith  cortex Stomata:  where all gas exchange takes place o O2 leaves o CO2 coming in o Water is leaving  Guard cells regulate these gas exchanges Clicker Question 7: A. Yes Clicker Question 8: B No Determinate growth: when a plant stops growing after a certain size Indeterminate growth: continuation of growth throughout a plant’s life Length of life cycles:  Annuals: o Life cycle= 1 year  Biennials: o Life cycle=2 years  Perennials: o Life cycle= many years How do plants grow? (Primary growth)  Through meristems o Apical meristems  Tip of the root  Tip of the plant Clicker Question 9: C Secondary growth:  Thickening of stems and roots  Lateral meristem o Area where the cell division exists o 2 types:  vascular cambium  lateral meristem between primary xylem and phloem  Cork Cambium  Lateral meristem on outer edge of stem cortex o Secondary xylem= wood toward interior o Secondary phloem= produces inner bark toward exterior Clicker Question 10: A Flowers are reproductive organs  Sepals: enclose bud  Petals: colorful, attracts pollen movers (ex: bees) How do plants reproduce? 1. Mature plant with flowers, where fertilization occurs 2. Fruit (mature ovary) containing seeds 3. Seed (embryo) 4. Germinating seed 5. Seedling


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