Bio 102 Week 2 Biology Exam Answers
BIO 102-BioJeopardy II Exam is February 27th
Breathe In, Breathe Out
100-Name 4 different types of respiratory surfaces for organisms with examples Skin-frogs Gills-Fish (also skin) Tracheae-Insects (tracheal tubes directly feed body tissues across cell membranes, separate from circulatory system) Lungs-Humans (other mammals)-exchange of gases 200-1, Air rushes into the lungs of humans during inhalation because A) the rib muscles and diaphragm contract, increasing the lung volume. B) pressure in the alveoli increases. C) gas flows from a region of lower pressure to a region of higher pressure. D) pulmonary muscles contract and pull on the outer surface of the lungs. E) a positive respiratory pressure is created when the diaphragm relaxes. …show more content…
D) The epiglottis closes. E) The rib cage expands. 3. A person with a tidal volume of 450 mL, a vital capacity of 4,000 mL, and a residual volume of 1,000 mL would have a potential total lung capacity of A) 1,450 mL. D) 5,000 mL. B) 4,000 mL. E) 5,450 mL. C) 4,450 mL. 300-Organisms in water use countercurrent exchange for gas diffusion. A. How does this work? Blood flows in the opposite direction to water passing over the gills, blood is always less saturated with O2 than the water it meets (remember higher partial pressure to lower partial pressure!). Gills have several outfoldings to increase surface area and exchange B. Why do organisms living in water need to do this? The water medium has inherently lower concentrations of oxygen and higher viscosity of air so countercurrent exchange helps to facilitate diffusion 400-1. The blood level of which gas is most important in controlling human respiration rate? A) nitric acid D) carbon dioxide B) nitrogen E) carbon monoxide C) oxygen 2. Blood carbon dioxide levels determine the pH of other body fluids as well as blood, including the pH of cerebrospinal fluid. How does this enable the organism to control breathing? A) The brain directly …show more content…
B) the development and then regression of testes prior to sexual maturation. C) the observation that all of the offspring are haploid. D) dependence on favorable weather conditions for ovulation to occur. E) the persistence of a vestigial penis among some of the females. 200-Name two reasons for and two reasons against asexual reproduction. For: -do not waste energy finding a mate -rapid reproduction & colonization in favorable habitats -ensures gene pool is passed to next generation Against: -pathogens can decimate clonal populations -loss of genetic diversity -cannot easily rid population of harmful mutation 300-Internal vs external fertilization. Make one comparison and one contrast Comparison -both produce zygotes -both are sexual reproduction Contrasts -External-many gametes for both sexes (not just male) -Greater parental investment (internal) -invest reproductive energy differently b. Where and when does fertilization occur in humans? Oviduct/fallopian tube, ovulation 400-1. In vertebrate animals, spermatogenesis and oogenesis differ, in that A) oogenesis begins at the onset of sexual maturity, whereas spermatogenesis happens in embryonic development. B) oogenesis produces four haploid cells, whereas spermatogenesis produces only one functional spermatozoon. C)
Breathe In, Breathe Out
100-Name 4 different types of respiratory surfaces for organisms with examples Skin-frogs Gills-Fish (also skin) Tracheae-Insects (tracheal tubes directly feed body tissues across cell membranes, separate from circulatory system) Lungs-Humans (other mammals)-exchange of gases 200-1, Air rushes into the lungs of humans during inhalation because A) the rib muscles and diaphragm contract, increasing the lung volume. B) pressure in the alveoli increases. C) gas flows from a region of lower pressure to a region of higher pressure. D) pulmonary muscles contract and pull on the outer surface of the lungs. E) a positive respiratory pressure is created when the diaphragm relaxes. …show more content…
D) The epiglottis closes. E) The rib cage expands. 3. A person with a tidal volume of 450 mL, a vital capacity of 4,000 mL, and a residual volume of 1,000 mL would have a potential total lung capacity of A) 1,450 mL. D) 5,000 mL. B) 4,000 mL. E) 5,450 mL. C) 4,450 mL. 300-Organisms in water use countercurrent exchange for gas diffusion. A. How does this work? Blood flows in the opposite direction to water passing over the gills, blood is always less saturated with O2 than the water it meets (remember higher partial pressure to lower partial pressure!). Gills have several outfoldings to increase surface area and exchange B. Why do organisms living in water need to do this? The water medium has inherently lower concentrations of oxygen and higher viscosity of air so countercurrent exchange helps to facilitate diffusion 400-1. The blood level of which gas is most important in controlling human respiration rate? A) nitric acid D) carbon dioxide B) nitrogen E) carbon monoxide C) oxygen 2. Blood carbon dioxide levels determine the pH of other body fluids as well as blood, including the pH of cerebrospinal fluid. How does this enable the organism to control breathing? A) The brain directly …show more content…
B) the development and then regression of testes prior to sexual maturation. C) the observation that all of the offspring are haploid. D) dependence on favorable weather conditions for ovulation to occur. E) the persistence of a vestigial penis among some of the females. 200-Name two reasons for and two reasons against asexual reproduction. For: -do not waste energy finding a mate -rapid reproduction & colonization in favorable habitats -ensures gene pool is passed to next generation Against: -pathogens can decimate clonal populations -loss of genetic diversity -cannot easily rid population of harmful mutation 300-Internal vs external fertilization. Make one comparison and one contrast Comparison -both produce zygotes -both are sexual reproduction Contrasts -External-many gametes for both sexes (not just male) -Greater parental investment (internal) -invest reproductive energy differently b. Where and when does fertilization occur in humans? Oviduct/fallopian tube, ovulation 400-1. In vertebrate animals, spermatogenesis and oogenesis differ, in that A) oogenesis begins at the onset of sexual maturity, whereas spermatogenesis happens in embryonic development. B) oogenesis produces four haploid cells, whereas spermatogenesis produces only one functional spermatozoon. C)