GENERAL BIOLOGY          PRACTICE MIDTERM III            SPRING 2004

 

 1.  B cells

a. are responsible for humoral immunity

b. attack foreign antigens by producing perforins

c. are macrophages

d.  become mature in the thymus gland

 

2.  Memory cells

a.  produce antibodies

b. are plasma cells that produce perforins

c. are needed to generate new plasma cells during subsequent exposure to antigens

d.  are cytotoxic T cells which form antibodies

 

3.  T cells

a.  become mature in lymph nodes

b.  attack cells that are infected with foreign antigens such as viruses

c.  are involved in the non-specific immune response

d.  produce histamine

 

4.  Which of the following does not occur during the inflammatory response?

a. histamine causes dilation (enlargement) of blood vessels

b. plasma leaks out of blood vessels

c.  neutrophils engulf (destroy) bacteria

d.  Plasma cells produce antibodies

 

5.  The function of lymph nodes is to__________

a. filter lymph fluid

b. filter blood

c. stimulate T cells to mature

d. all of the above

 

6.  The function(s) of the lymphatic system is (are) to

a. return filtered lymph to the blood

b. fight infection

c. recycle red blood cells

d. both a and b

 

7.  An example of an autoimmune disease would be_______

a.  AIDS

b. immune response during organ transplantation

c. multiple sclerosis

d. all of the above

 

8.  Which of the following is not a component of the allergic response?

a. Plasma cells produce a special type of antibody not found in other immune responses

b. Activated T cells phagocytose the allergy-causing substance in the blood

c. histamine is released from mast cells only following the second exposure to an allergen (e.g.pollen)

d. antibodies attach to mast cells

 

9. Digestion is completed and most nutrients are absorbed in the ______________

a. stomach

b. colon

c. small intestine

d. pyloric sphincter

 

10. _________ facilitates the action of lipase by emulsifying fats

a. bile

b. amylase

c. pepsin

d. hydrochloric acid

 

11. Which of the following are not functions of the digestive system?

a. digestion of cellulose by bacteria in ruminant stomachs

b. nutrient absorption

c. segmentation of smooth muscle

d. production of hydrochloric acid by chief cells

 

12. Saliva contains an enzyme, ________ which begins to digest __________

a. pepsin; sugars

b. amylase; polysaccharides

c. pepsin; proteins

d. amylase; bacteria

 

13. Motility of the digestive tract involves___________

a. contraction of longitudinal and circular smooth muscle

b. countercurrent circulation

c. peristalsis

d. a and c

 

14. Ruminants

a. are monogastric

b. require bacteria to aid carbohydrate digestion

c. are incapable of cellulose digestion

d. are unusual in that they have digestive tracts typical of most carnivores

 

15. The _______ environment of the _________ is ideal for ___________ digestion

a. acidic; intestine; polysaccharide

b. acidic; stomach; protein

c. acidic; stomach; fat

d. basic; esophagus; vitamin

 

16. ________ on the surface of the small intestine increase  ____________, which facilitates absorption

a. bile; protein digestion

b. microvilli; pepsin secretion

c. microvilli; surface area

d. b and c

 

17. ________ are the site for gas exchange in the lungs

a. gill filaments

b. alveoli

c. trachea

d. tracheoles

 

18. The __________ generates the basic breathing mechanism

a. phrenic nerve

b. medulla

c. diaphragm

d. intercostal muscle

 

19. ________ are structures responsible for direct oxygen transfer into the circulatory system 

a. gills

b. alveoli

c. lungs

d. a and b

 

20. Efficient gas exchange requires a respiratory cell surface with which of the following characteristics?

a. thin and moist with a large surface area

b. thick and moist with a small surface area

c. thick and dry with a large surface area

d. thin and moist with a small surface area

 

21. Countercurrent exchange could be described as a_________________

a. mechanism to allow for maximal oxygen extraction by blood due to a high diffusion gradient

b. poor, adaptive strategy for fish digestion

c. process only effective in open circulatory systems

d. adaptation for blood delivery in only 2-chambered hearts

 

22. Which respiratory organ extracts oxygen from air during both inspiration and expiration?

a. fish gills

b. mammalian lungs

c. bird lungs

d.  amphibian skin

 

23. Inhalation (breathing in) occurs because_____________________

a. lung volume increases which decreases lung pressure

b. lung volume increases which increases lung pressure

c. lung volume decreases which decreases lung pressure

d. lung volume decreases which increases lung pressure

 

24. It is more challenging to breathe in an aquatic (water) environment because

a. there is less oxygen available

b. water is more dense than air

c. water is less viscous than air

d. both a and b

 

25. A person with Type B blood

a. will react against blood from type A and AB donors

b. will react against blood from type O donors

c. would be a universal blood donor

d. would be a universal blood recipient

 

26. Improvement in the ability to deliver oxygen as animals moved to dry land is made possible by the evolutionary development of___________

a. internal, moistened lungs

b. open circulatory systems

c. 4-chambered, dual-circuit heart

d. a and c

 

27. Which of the following are characteristics of closed circulatory systems?

a. blood leaves the arterial circulation to directly bathe cells

b. blood flow can be regulated and directed toward specific tissues

c. a and b

d. none of the above

 

28. Red blood cells____________________

a. represent 1% of all blood cells

b. contain hemoglobin

c. transport carbon dioxide from lungs to tissues

d. are phagocytic

 

29. Basophils

a. are functionally identical to monocytes

b. mediate the allergic response

c. are derived from megakaryocyte cell fragments and thus are not true cells

d. b and c

 

30. The cardiac conduction system consists of a specialized group of cells called the ________, which initiates the electrical signal in the heart

a. sinoatrial (SA) node

b. bundle branches

c. Bundle of His

d. atrioventricular (AV) node

 

31. In the pulmonary circuit, blood flows from the _________ into the  __________ and exits the heart via the ________ and after gas exchange at the lungs, returns to the heart via the _____________, entering into the ____________

a. right atria; right ventricle; pulmonary artery; pulmonary vein; left atria

b. right atria; left ventricle; pulmonary artery; aorta; left atria

c. left atria; left ventricle; pulmonary vein; pulmonary artery; right atria

d. right atria; right ventricle; aorta; pulmonary vein; left atria

 

32. Which of the following are not functions of the blood?

a. nutrient transport

b. temperature regulation

c. allergic responses

d. carbon dioxide delivery to tissues

 

 33. Only __________ have a notochord, a nerve cord, a pharynx with gill slits, and a tail extending past the anus

a. lancelets

b. lampreys

c. vertebrates

d. all of the above

 

34. Cartilaginous fish

a. include tuna and salmon

b. use claspers for internal fertilization

c. have a complex cerebral cortex (brain)

d. have a 3-chambered heart

 

35. During the evolution from amphibian to land animal

a. gill function is lost

b. the respiratory function of the skin is maintained

c. external fertilization is conserved

d. all of the above

 

36. Reptiles

a. are endothermic and are therefore, excellent thermoregulators

b. have highly evolved teeth including canines, incisors, molars, etc.

c. include some species which have 4-chambered hearts

d. are the only vertebrate found on every continent across the world

 

37. Amphibians

a. use both skin and lungs for respiration

b. have thick, waterproof skin

c. have two-chambered hearts

d. utilize internal fertilization

 

38. Reptiles moved fully onto land and adapted owing to_________

a. tough, thick skin

b. internal fertilization

c. limb development for mobility

d. all of the above

 

39. Adaptation(s) for flying include

a. lightweight, porous bones

b. feathers

c. efficient respiratory system

d. all of the above

 

40. Mammals

a. have a well-developed cerebral cortex

b. are confined to only a few continents due to poor ability to adapt to different environments

c. lack social skills that are well-developed in lower vertebrates (fish, amphibians)

d. May resort to utilizing skin as a respiratory organ under extreme conditions

 

41. During  evolution from amphibians to land animals which of the following were not useful adaptations?

a. internal fertilization

b. internal respiratory system

c. open circulation

d. thick skin