Translocation in the phloem of plants occurs as a result of

difference in water potential in source & sink

Difference between B cells and T cells.

B cells - antibodies, T cells - kill pathogen

Which is not true of HIV?

All HIV exactly the same in people

Why would a second vaccination be beneficial?

Stimulates production of higher concentration of antibodies

Insulin vs. glucagon concerning blood glucose levels.

Insulin - lowers, Glucagon - raises

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Plants, Human Body, Lower Kingdoms

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Answers

1
Once potential threshold is reached after neuron is stimulated which of the following occurs?
Inside becomes negatively charged
Action potential generated
Na channel closes
K channel opens
2
What type of solution would cause a cell to lose water?
Hypotonic
Hypertonic
Isotonic
3
Released into synapse acting as signal molecules
neurotransmitters
potassium ions
sodium ions
receptor proteins
4
Type of plant that requires a night period that is shorter than a a critical period.
Long-day
Perennials
Short- day
Annuals
5
Important mechanism involving movement of water from roots to leaves.
Gravity
Transpiration
Osmosis
Pressure
6
Most likely ancestor of land plants.
green algae
angiosperms
Ferns
gymnosperms
7
Which of the following is least inclusive?
Kingdom
Domain
Genus
Species
8
How does sperm of flowering plant reach the egg?
sperm actively swimming to egg
ovule swimming to the sperm
via a pollen tube
insect placing pollen in ovary
9
Type of plant that requires a period of continuous darkness longer than a critical period.
Short-day plants
Perennials
Annuals
Long-day plants
10
Which type of neuron carries the message to the muscle to move?
motor
spinal cord
interneuron
sensory
11
True of the Kingdom Protista:
All of the above are true
Heterotrophic
Autotrophic
Paramecium is an example
12
What is most likely to occur when the stomates are open?
Water exits plant
Water enters plant
Oxygen enters plant
Carbon dioxide exits plant
13
Not specifically a plant adaptation for life on land.
Auxin
Seeds
Roots
Stomata
14
Translocation in the phloem of plants occurs as a result of
osmotic pressure and turgor pressure
cohesion of water molecules in transpiration
difference in water potential in source & sink
release of auxins in water loss
15
Negative feedback system in body:
Very rare
Returns deviation to setpoint
Example is childbirth
Magnifies deviation from setpoint
16
Difference between B cells and T cells.
B cells - antibodies, T cells - kill pathogen
B cells - active immunity, T cells - passive immunity
T cells - antibodies, B cells - kill pathogen
B cells - cell mediated response, T cells - humoral response
17
Which is not true of HIV?
Rapidly mutating
HIV can evolve in affected individual
All HIV exactly the same in people
RNA to DNA
18
Why would a second vaccination be beneficial?
2 injections needed to stimulate antibody production
Stimulates production of higher concentration of antibodies
Plasma cells can only survive 2-5 days
Keeps plasma cell circulating in bloodstream
19
Which of the following are prokaryotic?
Archaea
Protists
Viruses
Fungi
20
Insulin vs. glucagon concerning blood glucose levels.
Both have the same affect
Insulin and glucagon raise
Insulin - lowers, Glucagon - raises
Insulin - raises, Glucagon - lowers

Plants, Human Body, Lower Kingdoms Flashcards | StudBud