Name:________________________________________________
G-number_____________________________________________
Lab instructor's name:___________________________________
Lab section:_______
Introductory Biology II, Exam III
Spring, 2006
Instructions: There are 50 questions. Write down the best answer for each one. Please make sure that you fill
out your scantron correctly. In case of discrepancy, the answer on the scantron will be considered your answer.
When you're finished, please hand in the scantron & exam sheet. Good luck!
____1) A cluster of nerve cell bodies is known as a:
a) nerve b) ganglion c) sensory nerve d) motor nerve e) meninges
____2) a signal leaves a neuron through the:
a) dendrites b) axon c) nerve cell body d) nucleus e) muscle cell
____3) All neurons have more or less the same shape:
a) True b) False
____4) At rest, the voltage on the inside of a neuron (measured with respect to the outside) is about:
a) -70mv b) +70mv c) -50mv d) +50mv e) +35mv
____5) A neuron is depolarized because of:
a) Na+ ions moving out b) Na+ ions moving in c) K+ ions moving out
d) K+ ions moving out e) nothing moving anywhere
____6) A neurotransmitter can:
a) increase the membrane voltage in the post-synaptic neuron
b) decrease the membrane voltage in the post-synaptic neuron
c) do either a or b depending on the type of neurotransmitter
d) none of the above
____7) morphine and heroin mimic:
a) acetylcholine b) dopamine c) seratonin d) endorphin e) none of the above
____8) The two main types of receptors in the body are interoreceptors and:
a) motor receptors b) auserhalbreceptors c) excitatory receptors d) exteroreceptors
e) none of the above
____9) The process by which a stimulus is converted into an action potential is known as:
a) integration b) transmission c) amplification d) sensory transduction e) synthesis
____10) Hearing is a:
a) mechanoreceptor b) pain receptor c) thermoreceptor d) chemoreceptor
e) electromagnetic receptor
____11) The sense of touch usually includes all of the following EXCEPT:
a) deep touch receptors b) light touch receptors c) pain receptors d) cold receptors
e) there are no exceptions on this list
____12) The eustachian tubes:
a) push sound against the malleus b) collect and channel sound to the auditory canal
c) equalize pressure between the outer and middle ear d) are part of the cochlea
e) contain the Organs of Corti
____13) The tectorial membrane is found in the:
a) upper or vestibular canal b) lower or tympanic canal c) middle canal or cochlear duct
d) eustachian tubes e) utricle
____14) Animals that can hear frequencies below 20 Hz:
a) humans b) bats c) sponges d) elephants e) jellyfish
____15) Humans detect movement using the:
a) cochlea b) semi-circular canals c) utricle d) saccule e) pinna
____16) Dogs have approximately how many different chemoreceptor cells (careful here)?
a) 10 b) 100 c) 1,000 d) 10,000 e) 100,000
____17) Animals (vertebrates) active at night often have a (careful, trick question):
a) choroid b) sclera c) tapetum d) retina e) all of the above
____18) The amount of light that enters the eye is controlled by the:
a) cornea b) sclera c) iris d) lens e) retina
____19) When focusing on something near (close-up), the lens becomes more:
a) round b) flat c) transparent d) opaque e) purple
____20) Cones come in three basic types, which are sensitive to:
a) yellow, purple & green b) red, purple & yellow c) red, green & blue
d) magenta, cyan & yellow e) brown, black & gray
____21) The blind spot is caused by the:
a) cornea b) sclera c) optic nerve d) lens e) iris
____22) Animals that can sense the electrical signals generated by muscle contractions include:
a) humans b) bats c) pit vipers d) sharks e) hawks
____23) Insects have an exoskeleton. They can:
a) grow to a large size and must molt b) not grow to a large size and don't have to molt
c) grow to a large size and don't have to molt d) not grow to a large size and have to molt
e) none of the above
____24) Squid and octopus can move by:
a) jet propulsion b) brachiation c) flying d) running e) hopping
____25) Myosin binding sites are normally covered by by:
a) actin b) Ca+ c) tropomyosin d) ATP e) rigor mortis
____26) Muscle movement is caused by the:
a) movement of actin heads b) movement of tropomyosin heads c) movement of myosin heads
d) none of the above
____27) Muscles that allow slow sustained contractions are also known as:
a) fast fibers b) intermediate fibers c) slow fibers d) crossed fibers e) unifibers
____28) The most intelligent invertebrates are probably:
a) humans b) dolphins c) cnidarians (jellyfish) d) crabs e) squid & octopus
____29) Gray matter consists mostly of:
a) the myelin sheath b) ventricles c) nerve cell bodies d) meninges e) none of the above
____30) The meninges consist of several layers; the tough outside layer is also known as the:
a) dura mater b) pia mater c) arachnoid membrane d) medulla e) cork layer
____31) Sensory information is taken from the sensory neuron to the thalamus and then to the (pick best
answer):
a) hypothalamus b) hippocampus c) limbic system d) sensory cortex e) medulla
____32) The part of the brain that lets you determine the direction of sound is the:
a) hypothalamus b) hippocampus c) superior olive d) optic chiasma e) pons
____33) The area of the brain where "intelligence" and "consciousness" reside is the:
a) medulla b) hypothalamus c) superior olive d) cerebral cortex e) cerebellum
____34) Responsible for motor coordination:
a) medulla b) hypothalamus c) superior olive d) cerebral cortex e) cerebellum
____35) Determines the emotional content of information reaching the brain:
a) limbic system b) reticular formation c) corpus callosum d) cerebellum e) pons
____36) A person who senses an object with his left hand may not be able to name the object if he/she has a
severed:
a) cerebrum b) ventricle c) corpus callosum d) cerebellum e) medulla
____37) Plants most likely evolved from:
a) moss b) angiosperms c) green algae d) sponges e) fish
____38) Designed to anchor the plant and absorb water and minerals from the soil:
a) leaves b) shoots c) roots d) flowers e) none of the above
____39) Bryophytes is a general term used for plants:
a) without a vascular system b) with a vascular system c) with chloroplasts d) b & c
e) none of the above
____40) The gametophyte in plants is:
a) haploid b) diploid c) triploid d) quadroploid e) hexaploid
____41) In mosses, the dominant stage of the life cycle is the:
a) gametophyte b) sporophyte c) mesophyte d) egg e) capsule
____42) Also known as naked seed plants:
a) angiosperms b) ferns c) mosses d) lycophytes e) gymnosperms
____43) Grasses (like the ones on any lawn) have flowers:
a) true b) false
____44) In order to be pollinated, some flowers discussed in class attract flies. These flower smell:
a) pleasant b) sweet c) like a rotting corpse d) a & b e) none of the above
____45) Xylem (in angiosperms) is made up of:
a) tracheids b) vessels c) sieve tubes d) all of the above e) a & b
____46) Vascular tissue is made up of:
a) xylem b) phloem c) epidermal tissue d) ground tissue e) a & b
____47) Dicots generally have:
a) parallel veins b) branched veins c) no veins d) a dicot e) a & b
____48) Monocots and dicots are named for:
a) the number of shoots they have b) the number of roots they have
c) the number of seed leaves (cotyledons) they have d) a & b e) none of the above
____49) The stomata are surrounded by:
a) mesophyll b) vascular tissue c) guard cells d) sleepy cells e) none of the above
____50) Mesophyll is composed mostly of:
a) parenchyma cells b) stomata c) guard cells d) xylem e) sclereids
Reminder
Please put the name of your lab instructor and your section number on the front of the exam, then hand in your
scantron and this exam.