BSC 2010- Exam5 (50 Points Total); 11/21/03

BSC 2010- Exam5 (50 points total); 11/21/03

Name______KEY______Social Security#______

Honor Code Pledge- In taking this exam I have adhered to the Academic Honor Code of Florida State University. ______(your signature)

On the back of the last page of the exam list any questions on this exam which you feel were ambiguous, unclear or unfair and why.

Instructions. Insert the following information in the box in the upper left had corner of the test form (see figure at right): Instructor- Ellington, Course- BSC 2010, Section- 01, form- exam # 5B, Date – 11/21. In the space marked “print last name first” write your name in block letters (last name then “space” first name) and bubble the appropriate letter in using a # 2 pencil. In the “special coding section”,

PRINT A LARGE “B”. Put your social security number in the “identification no.” space and bubble numbers below. Failure to follow the above directions may lead to you getting no credit for the exam.

1 INSTRUCTIONS: There are 25 x 2 pts questions (50 pts total). Best of luck!

1. We can say that the rate of passive diffusion (J) of a substance through the skin of an organism is increased when the ______. (A) D is increased, (B) C is increased, (C) A is increased, (D) d is decreased or (E) all of the above.

2. Your blood is a (n) ______. (A) intracellular fluid, (B) extracellular fluid, (C) interstitial fluid, (D) external fluid or (E) none of the above.

3. Which combination of P and R would lead to the highest flow of blood through a vessel?- (A) P = 43, R= 100, (B) P = 43, R= 10, (C) P = 4, R= 100, (D) P = 43, R= 1 or (E) P = 63, R=1. (don’t worry about units)

4. Consider blood flow through a five different vessels each having the SAME length of 10 cm. Assume the P is the SAME for each. Each differs in terms of the vessel radius. Which radius would produce the LOWEST blood flow? (A) 0.2 cm, (B) 0.01 cm, (C) 1 cm, (D) 1.5 cm OR (E) 0.5 cm.

5. Which of the following processes produce(s) waste heat? (A) digestion, (B) biosynthesis, (C) energy metabolism, (D) muscle contraction or (E) all of the above.

6. Which of the following is (are) convection? (A) blood flowing through blood vessels, (B) air flowing in and out of the lungs, (C) water flowing across the gills of fish, (D) all of the above or (E) none of the above.

7. An aquatic protozoan like an amoeba can rely on passive diffusion for transport into, out of and within because ______. (A) D is very low, (B) C = 0, (C) d is very low, (D) all of the above OR (E) none of the above.

8. The basic difference(s) between the amphibian and the mammalian circulatory plan is that amphibians - (A) have 2 chambered hearts, (B) have hearts with complete separation of oxygenated and deoxygenated blood, (C) have hearts with incomplete separation of oxygenated and deoxygenated blood, (D) have 4 chambered hearts or (E) none of the above.

9. In the mammalian circulatory plan, blood is pumped from the right ventricle into the ____: (A) aorta, (B) systemic circulation, (C) pulmonary vein, (D) right atrium or (E) pulmonary artery.

10.Blood flow in the systemic circulation of fish is sluggish because ______(A) the gills offer great resistance to blood flow, (B) the gills offer minimal resistance to blood flow, (C) the ventricle of fish pumps blood DIRECTLY into the systemic circulation, (D) the P is high throughout the fish circulation or (E) fish typically have three chambered hearts.

2 11.Animals that have open circulatory systems would have the following characteristics EXCEPT- (A) low blood pressure, (B) many blood sinuses, (C) sluggish circulatory flow, (D) low blood volume relative to total body volume or (E) none of the above.

12.You might expect to find a closed circulatory system in which kind of animal? (A) giant squid [a cephalopod mollusc], (B) lizard [a vertebrate], (C) earthworm [an annelid], (D) all of the above or (E) none of the above.

13.Which of the following is (are) true of veins? (A) generally carry deoxygenated blood, (B) carry blood towards the heart, (C) have low blood pressure, (D) have uni-directional valves or (E) all of the above.

14.Ventilation of specialized gas exchange organs is obligatory (means absolutely essential) in large, active, aquatic animals like fish because ______. (A) the diffusion coefficient of oxygen in water is low (compared to air), (B) the oxygen content of water is low (compared to air), (C) the viscosity of water is low (compared to air), (D) A & B only or (E) B & C only.

15.Insects have open circulatory systems yet they are able to achieve high rates of oxygen consumption and activity (flight) because ______. (A) they have hemoglobin in their blood, (B) blood pressure is high throughout their circulatory system, (C) air is carried by small tubes directly to where it is needed (cells), (D) all of the above or (E) none of the above.

16.Gas exchange in alveoli is very efficient because ______. (A) “d” values are high, (B) total surface area is low, (C) alveoli are covered with blood capillaries, (D) PO2 of air in alveoli is low or (E) ventilation is continuous.

17.Which of the following is (are) feature(s) of the bird respiratory system? (A) gas exchange takes place in the air capillary lung, (B) air sacs are the ventilatory structures, (C) air flow takes place in the lungs during BOTH inspiration AND expiration, (D) all of the above or (E) none of the above.

18.Hemoglobin ______. (A) is a protein containing a metal, (B) binds oxygen at high PO2’s, (C) releases oxygen when the PO2’s fall in the vicinity of the tissues, (D) all of the above or (E) none of the above.

19.The systemic circulation in mammals______. (A) receives deoxygenated blood from the right ventricle, (B) receives oxygenated blood DIRECTLY from the lungs, (C) receives deoxygenated blood from the left ventricle, (D) receives oxygenated blood from the right atrium, or (E) receives oxygenated blood from the left ventricle.

20.During ventricular systole ______. (A) the ventricles are contracting, (B) the atria are relaxing, (C) the semi-lunar valves open, (D) all of the above OR (E) none of the above.

3 21.The “blood” in a lobster (a crustacean [arthropod]) is called hemolymph because ______. (A) it is found mostly in sinuses, (B) is found exclusively in blood vessels, (C) its hydrostatic pressure is always very high, (D) its flow is not driven by contraction of a heart or (E) none of the above.

22.Fish maximize their capacity to take up oxygen and release carbon dioxide by ______. (A) NOT ventilating their gills, (B) having counter-current flow of blood and water in gills, (C) having gills which are very thick [“d” is high], (D) all of the above OR (E) none of the above.

23.A land planarian (a terrestrial flatworm) has no specialized gas exchange organ but rather can rely on passive diffusion without ventilation because ______. (A) the diffusion coefficient of oxygen in air is very high, (B) the oxygen content of air is low, (C) these animals are extremely active, (D) air is very viscous OR (E) heat increases the oxygen solubility in air.

24.The only major problem with gas exchange in air is ______. (A) high energy cost of ventilation, (B) potential respiratory water loss, (C) low oxygen content of air, (D) all of the above OR (E) none of the above.

25.Oxygenated blood from the lungs is carried by the pulmonary vein and enters the ______. (A) right ventricle, (B) right atrium, (C) left ventricle, (D) left atrium or (E) vena cava.