BIOL 1902 Lecture : Wk 3.doc

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taupezebra881

29 Mar 2012

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Bodyguards: some animals enlist the help of more powerful animals. Examples: carpenter ants defend aphids and other types of. Paid for their services with food in the form of honeydew. Vigilance = being on the alert for danger. Which often involves scanning the environment for signs of danger. Animals scan for: vibrations: can be sensed by some animals. Snakes have no ears; they sense vibrations in the ground. Fish lateral lines on their sides have sensors for vibrations in the water: scents: using their noses: olfactory sense (smell) is important. Large snout has a large nasal chamber wth many folds to increase its surface area = More olfactory receptors, better detection of odours (moose, deer, etc. ) Vomeronasal organ = jacobson"s organ: special pocket in roof of mouth that has dense. Snakes have forked tongues to pinpoint the source of the. Odour: sounds: auditory sense = hearing is imporant to many animals.

Related Questions

Sensory systems

1.All sensory input arrives at the central nervous system in the same form, as ____________ propagated by afferent neurons. Perception of the type and intensity of a stimulus depends on which part of the brain the impulse projects to and the firing frequency the sensory neuron.

A.action potentials B.receptor potentials C.reflexes D.frequency localizations E.thresholds

2.The simplest sensory receptors are __________ that respond to mechanical distortion,changes in temperature, or specific chemicals.

A.nociceptors B.free nerve endings C.gated channels D.photoreceptors. E.ganglia

3.When membrane proteins on an olfactory neuron are stimulated by the binding of a specific chemical, what is the immediate result?

A.membrane depolarization B.membrane repolarization C.active ion transport D.membrane hyperpolarization E.neurotransmitter release

5.The lateral line system provides ________ with a sense of "distant touch," enabling these animals to sense objects that reflect pressure waves and low-frequency vibrations.

A.adult amphibians B.reptiles C.birds D.mammals E.fish

6.Which correctly represents the sequence of steps involved to convey sensory information to the CNS?

A.stimulation and ion flow through the synaptic cleft B.neurotransmitter release and interpretation
C.neurotransmitter release and ion flow through the synaptic cleft D.stimulation, transduction, transmission, and interpretation E.stimulation, transmission, and neurotransmitter release

7.Which of the following stimuli do vertebrates NOT have a specialized receptor for?

A.hearing B.taste C.smell D.humidity E.vision

8.Which of the following is NOT an example of a mechanoreceptor?

A.Meissner's corpuscles B.Ruffini endings C.Merkel cells D.red corpuscles E.Pacinian corpuscles

9.What are the receptors called that transmit impulses that are perceived by the brain as pain?
A. baroreceptors B. chemoreceptors C. nociceptors
D. thermoreceptors E. propioceptors

10. Which of the following do humans NOT have taste buds specialized to sense?

A. salty B. sour. C. sweet. D. vitamins E. bitter

1.The combined function of the malleus, incus, and stapes is to ____.

convert the mechanical vibration of the tympanic membrane into a pressure wave in the cochlear duct

convert the oval window's vibrations into vibrations of the tympanic membrane

equalize the pressure on both sides of the tympanic membrane

dampen the vibrations of the tympanic membrane

amplify the vibrations of the ear drum

2. The pitch of a sound depends on the ____of the sound wave.

3. Some animals, like humans, have two eyes on the front of the head that perceive a mostly overlapping visual field. In contrast, some herbivores (rabbits, for example) have eyes on the sides of their head and visual fields that may not overlap at all. How does this impact perception of the environment?

Humans have poorer depth perception and a wider field of vision than rabbits.

Due to integration by the brain, there is really no difference in depth perception or visual field size when comparing humans to rabbits.

Humans have better depth perception and a narrower field of vision than rabbits.

Humans have poorer depth perception and a narrower field of vision than rabbits.

Humans have better depth perception and a wider field of vision than rabbits.

4.In the process of lateral inhibition, ____ inhibit distant bipolar cells.

MOLECULAR BIO HELP

QUESTION 1

Which of these choices is an example of acclimatization?

		Plants growing in the shade grow larger leaves compared to the leaves growing in direct sunlight.
		A.Pigweed plants ( Amaranthus retroflexus ) growing in North Carolina are more tolerant to heat than plants growing in Canada.
		A.The quadrate bone of snakes is movable rather than rigidl y attached, as seen in other vertebrates.
		A.Desert rodents produce more concentrated urine because of their longer loop of Henle as compared to the loop of Henle found in other rodents living in less arid conditions.

10 points

QUESTION 2

Which of these choices is an example of connective tissue ?

		cardiac muscle
		neurons
		blood
		glial cells

10 points

QUESTION 3

Which of these choices best describes homeostasis ?

		A.maintenance of a relatively constant internal environment
		A.all vertebrates have a similar body plan
		A.exchange of materials with the environment a cell is found in
		A.relationship of the structure and function in animals

10 points

QUESTION 4

You are looking at two cells under a microscope. Both have the same shape, but cell A is smaller than cell B. Which of these statements correctly describes cell B?

		A.The larger cell has less surface area than the smaller cell.
		A.The larger cell has a smaller sur face-to- volume ratio than the smaller cell.
		A.The larger cell has the same surface-to-volume area as the smaller cell.
		A.The larger cell has more surface area than the smaller cell.

10 points

QUESTION 5

Which of these statements is true about ectotherms?

		A.Ectothermic animals tend to be found in arctic regions.
		A.E ctotherms tend to consume more calories than endotherms of similar size.
		A.Ectotherms tend to have more insulating structures than endotherms.
		A.Ectotherms use more energy for reproduction than for heat production.

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BIOL 1902 Lecture : Wk 3.doc

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