Considering the transport of water within an organism as described in the transport lab,
what is a strategy that is most often used by tracheophytes plants to move water? - use
of differences in water potential
Why do single celled organisms lack the internal transport systems found in multicellular
organisms? - They are in direct contact with their environments (Single-celled
organisms are in direct contact with their environments, so diffusion alone is adequate
to deliver nutrients to, and remove wastes from, them. The cells in the interior of
multicellular organisms cannot benefit from diffusion alone in the same way, so a
transport system is needed to deliver nutrients to and take away wastes from these
cells.)
Explain the relationship between diffusion and osmosis - Osmosis is a specific instance
of diffusion; osmosis is water diffusion through a membrane not permeable to solutes
What is the water potential of pure water? - zero
Suppose you were given the following description of a plant: embryo has one seed leaf,
leaves show netted venation, stele shows xylem in the form of a cross, and vascular
bundles in the stem form a ring. What is the best conclusion? - All but the seed leaf data
suggest a dicot; the seed leaf data suggests a monocot (the data is contradictory)
What is one purpose of kinetin? - It stimulates cell division
In the Plant Hormones lab, why was the growing apex of the plant removed? - to
eliminate a significant natural source of IAA, so that the experimenter could control the
amount of IAA added to the plant
How was the "t-test" used in the Plant Hormones lab? - To help determine the cause of
the difference between mean lateral bud lengths from two different treatment groups
Which of the following is/are true, given the information in the table below about
treatments of pea plants whose apical buds were removed?
-Treatment 1 lanolin paste: no IAA carbowax: no kinetin
-Treatment 2 lanolin paste: no IAA carbowax: kinetin
-Treatment 3 lanolin paste: IAA carbowax: no kinetin
-Treatment 4 lanolin paste: IAA carbowax: kinetin
A. Comparatively, the IAA/kinetin ratio in treatment 1 is higher than the ratio in treatment
3.
, B. Comparatively, the IAA/kinetin ratio in treatment 2 is lower than the ratio in treatment
4.
C. Comparatively, the IAA/kinetin ratio in treatment 1 is lower than the ratio in treatment
2.
D. Comparatively, the IAA/kinetin ratio in treatment 3 is lower than the ratio in treatment
4. - B
What is true about Korotkoff sounds? - They are the sounds of turbulent blood flow in a
partially blocked arm artery
Depolarization of the SA node stimulates: - contraction of the atria
The flow of Na+ and K+ ions that is necessary for neurons to function depends upon: -
diffusion gradients and membrane permeability
When you performed the properties of nerves & neurons lab, you saw the effects of
ether, tetrodotoxin, and ouabain on the nerve impulse oscilloscope tracing. In terms of
elapsed time from applying each of these to seeing the complete effect, what shows the
proper relationship for the drug to show their full effects on tracing? -
ouabain>ether>tetrodotoxin
When the temperature of the nerve chamber is lowered, what happens? - The peak(s)
on the oscilloscope shift to the right
What do sensory receptors do? - detect a change in your environment
What do motor effectors do? - respond to stimuli
The nervous system of verebrates consists of ______ and ____ cells. - neurons, glial
Small changes in membrane potential caused by the opening and closing of gated ion
channels are called: - graded potentials
What are the three phases of action potentials? - rising, falling, and undershoot
What is the somatic nervous system? - motor neurons that stimulate contraction of
skeletal muscles (a subdivision of the peripheral nervous system)
What is the autonomic nervous system? - neurons that regulate the activity of the
smooth muscles, cardiac muscle, and glands (a subdivision of the peripheral nervous
system)
Generalize neuron parts: - Cell body containing the nucleus, multiple dendrites
extending off the cell body, and a single (long) axon
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