Download bio 161 psu exam 1 QUESTIONS WITH ANSWERS and more Exams Biology in PDF only on Docsity!
bio |/ 161 |/psu |/exam |/ 1 |/QUESTIONS |/WITH
|/ANSWERS
homeostasis |/- |/CORRECT |/ANSWERS |/✔✔the |/body's |/ability |/to |/maintain |/a |/constant |/environment two |/types |/of |/control |/systems |/in |/the |/body |/- |/CORRECT |/ANSWERS |/✔✔negative |/and |/positive |/feedback |/loops negative |/feedback |/loops |/- |/CORRECT |/ANSWERS |/✔✔body |/senses |/change |/and |/reacts |/to |/negate |/or |/reverse |/the |/condition positive |/feedback |/loops |/- |/CORRECT |/ANSWERS |/✔✔self-amplifying |/cycles |/in |/which |/an |/initial |/change |/leads |/to |/a |/greater |/change four |/major |/categories |/of |/organic |/molecules |/- |/CORRECT |/ANSWERS |/✔✔carbohydrates, |/lipids, |/proteins, |/nucleic |/acids monomer |/- |/CORRECT |/ANSWERS |/✔✔single |/molecular |/unit |/of |/a |/polymer
polymer |/- |/CORRECT |/ANSWERS |/✔✔molecule |/containing |/many |/repeating |/single |/molecules |/(monomers) three |/main |/types |/of |/lipids |/- |/CORRECT |/ANSWERS |/✔✔triglycerides, |/phospholipids, |/steroids function |/of |/phospholipids |/- |/CORRECT |/ANSWERS |/✔✔cell/organelle |/membranes composition |/of |/phospholipids |/- |/CORRECT |/ANSWERS |/✔✔fatty |/acids, |/phosphate |/group, |/glycerol function |/of |/triglyerides |/- |/CORRECT |/ANSWERS |/✔✔energy |/storage |/and |/insulation composition |/of |/triglycerides |/- |/CORRECT |/ANSWERS |/✔✔ 1 |/glycerol |/and |/ 3 |/fatty |/acids protein |/- |/CORRECT |/ANSWERS |/✔✔polymer |/of |/amino |/acid |/monomer nucleic |/acids |/- |/CORRECT |/ANSWERS |/✔✔function |/hereditary |/(DNA) |/and |/protein |/synthesis |/(RNA)
Golgi |/bodies |/- |/CORRECT |/ANSWERS |/✔✔-stacks |/of |/membranes -packaging |/proteins |/for |/transport |/in |/membrane vesicles |/- |/CORRECT |/ANSWERS |/✔✔small |/membrane |/sacs |/that |/specialize |/in |/moving |/products |/into, |/out |/of, |/and |/within |/a |/cell mitochondria |/- |/CORRECT |/ANSWERS |/✔✔-function |/in |/ATP |/production |/(cellular |/respiration) -have |/a |/small |/piece |/of |/circular |/DNA --inherited |/from |/mom --mutations |/can |/cause |/diseases Cytoskeleton |/- |/CORRECT |/ANSWERS |/✔✔-network |/of |/proteins |/in |/the |/cytoplasm functions |/of |/cytoskeleton |/- |/CORRECT |/ANSWERS |/✔✔-structural |/support -tracks |/for |/the |/transport |/of |/organelles |/or |/vesicles -important |/for |/muscle |/function --cytoskeletal |/proteins |/(actin) |/allow |/for |/muscle |/contraction the |/plasma |/membrane |/- |/CORRECT |/ANSWERS |/✔✔made |/of |/phospholipids, |/cholesterol, |/and |/membrane |/proteins
what |/causes |/the |/plasma |/membrane |/to |/be |/selectively |/permeable? |/- |/CORRECT |/ANSWERS |/✔✔hydrophobic |/chains hydrophilic |/heads what |/plays |/a |/role |/in |/what |/molecules |/can |/easily |/diffuse |/across |/a |/membrane? |/- |/CORRECT |/ANSWERS |/✔✔size, |/polarity, |/charge 2 |/types |/of |/transport |/across |/a |/cell |/membrane |/- |/CORRECT |/ANSWERS |/✔✔active |/and |/passive passive |/transport |/- |/CORRECT |/ANSWERS |/✔✔-diffusion |/(simple |/or |/facilitated) |/is |/an |/example |/of |/passive |/transport -requires |/a |/CONCENTRATION |/GRADIENT --particles |/move |/from |/high |/to |/low |/concentration example |/of |/facilitated |/diffusion |/- |/CORRECT |/ANSWERS |/✔✔channel- mediated |/transport leak |/channels |/- |/CORRECT |/ANSWERS |/✔✔channels |/that |/are |/always |/open
Shapes |/of |/epithelial |/cells |/- |/CORRECT |/ANSWERS |/✔✔squamous, |/cuboidal, |/columnar epithelial |/function: |/protection |/- |/CORRECT |/ANSWERS |/✔✔prevents |/abrasion, |/dehydration, |/and |/destruction |/from |/chemical |/and |/biological |/agents epithelial |/function: |/control |/absorption |/and |/secretion |/- |/CORRECT |/ANSWERS |/✔✔any |/substance |/entering |/or |/leaving |/the |/body |/must |/cross |/the |/epithelium, |/some |/are |/relatively |/impermeable, |/others |/are |/easily |/crossed epithelial |/function: |/location |/for |/some |/sensation |/- |/CORRECT |/ANSWERS |/✔✔sensory |/nerves |/in |/epithelial |/tissue |/are |/sensitive |/to |/stimuli epithelial |/function: |/specialized |/glandular |/secretions |/- |/CORRECT |/ANSWERS |/✔✔-physical |/protection |/if |/discharged |/onto |/epithelial |/surfaces |/(cooling, |/acidic |/mantle) -chemical |/messengers |/if |/secreted |/into |/the |/blood |/stream |/or |/interstitial |/fluid 4 |/characteristics |/of |/epithelial |/tissue |/- |/CORRECT |/ANSWERS |/✔✔- polarity: |/apical |/and |/basal
-attachment: |/to |/each |/other |/and |/to |/a |/basement |/membrane ---built |/to |/withstand |/chemical |/stress -avascularity: |/must |/obtain |/nutrients |/by |/diffusion -regeneration: |/life |/span |/2-6 |/days, |/regeneration |/by |/stem |/cells exocrine |/glands |/- |/CORRECT |/ANSWERS |/✔✔secrete |/chemical |/substances |/into |/ducts |/that |/lead |/either |/to |/other |/organs |/or |/out |/of |/the |/body endocrine |/glands |/- |/CORRECT |/ANSWERS |/✔✔glands |/that |/secrete |/chemicals |/called |/hormones |/directly |/into |/the |/bloodstream connective |/tissue |/- |/CORRECT |/ANSWERS |/✔✔support |/and |/interconnect |/the |/parts |/of |/the |/body 3 |/basic |/functions |/of |/connective |/tissue |/- |/CORRECT |/ANSWERS |/✔✔1.cells 2.fibers 3.ground |/substance connective |/tissue |/proper |/- |/CORRECT |/ANSWERS |/✔✔gel-like |/matrix loose |/or |/dense
stratum |/spinosum |/- |/CORRECT |/ANSWERS |/✔✔-keratinocytes |/stop |/dividing; |/bond |/together |/via |/desmosomes; |/shrivel |/up |/a |/bit |/due |/to |/water |/loss -site |/of |/langerhans |/cells stratum |/granulosum |/- |/CORRECT |/ANSWERS |/✔✔-keratinocyte |/produce |/keratin |/and |/lipids |/and |/then |/die --lipids |/provide |/a |/barrier |/to |/water -second |/site |/of |/langerhans |/cells stratum |/lucidum |/- |/CORRECT |/ANSWERS |/✔✔-in |/thick |/skin |/only -cells |/are |/dead |/(lost |/nuclei |/and |/organelles) stratum |/corneum |/- |/CORRECT |/ANSWERS |/✔✔-dead |/keratinocytes |/stack |/up |/in |/layers epidermis |/- |/CORRECT |/ANSWERS |/✔✔-outermost |/layer |/of |/skin -4 |/or |/ 5 |/layers melanocytes |/- |/CORRECT |/ANSWERS |/✔✔determine |/skin |/color |/by |/what |/type |/and |/how |/much |/is |/produced eumelanin |/- |/CORRECT |/ANSWERS |/✔✔brownish |/black |/pigment
pheomelanin |/- |/CORRECT |/ANSWERS |/✔✔reddish-yellow |/pigment function |/of |/melanin |/- |/CORRECT |/ANSWERS |/✔✔protects |/our |/cells |/from |/UV |/damage, |/but |/can |/prevent |/Vitamin |/D |/synthesis papillary |/layer |/of |/dermis |/- |/CORRECT |/ANSWERS |/✔✔-areolar |/tissue -forms |/dermal |/papillae reticular |/layer |/- |/CORRECT |/ANSWERS |/✔✔-dense |/irregular |/connective |/tissue -80% |/of |/dermis dermal |/papillae |/- |/CORRECT |/ANSWERS |/✔✔-interlock |/with |/dermal |/ridges |/to |/prevent |/layers |/from |/slipping -upward |/waves epidermal |/ridges |/- |/CORRECT |/ANSWERS |/✔✔-interlock |/with |/dermal |/papillae |/to |/prevent |/layers |/from |/slipping -downward |/waves
