Can someone help me on a few biology questions? These are regarding the nervous system.
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Can someone help me on a few biology questions? These are regarding the nervous system.

[From: ] [author: ] [Date: 12-08-13] [Hit: ]
causing them to be interpreted differently.C: The area of the cerebrum that the impulses are sent to interpret the impulses differently.D: The frequency of impulses causes the brain to interpret them differently.A drug causes an increase i the release of excitatory transmittor substances at a synapse. What is the overall affect?A: An increase in the stimulation of postsynaptic membranes.......
when do neurotransmitters create an action potential?

A: When they move through the protein pores
B: When they fit into receptor sites
C: When they excite the pre-synatic membrane
D: When they are broken down in the synapse

Depolaization of neurons is directly caused by which change in the neuron?

A: Sodium/potassium pump
B: Sodium ions entering the cell
C: Return of membrane potential to -60mV
D: Opening of potassium gates

Which function is NOT controlled by somatic neurons?

A: Diaphram movement
B: Movement of the hand
C: Instrinsic control of the heart rate
D: Control of digestion

How do impulses traveling along the auditory nerve are get interpreted differently from those traveling along the optic never?

A: The type of impulse sent along each nerve is different in nature.
B: The intensity of the impulses is different, causing them to be interpreted differently.
C: The area of the cerebrum that the impulses are sent to interpret the impulses differently.
D: The frequency of impulses causes the brain to interpret them differently.

A drug causes an increase i the release of excitatory transmittor substances at a synapse. What is the overall affect?

A: An increase in the stimulation of postsynaptic membranes.
B: Depression
C: Prevents impulses from reaching the post synaptic membranes.
D: Inhibits the entrance of calcium ions at the presynaptic membranes.


Which is not DIRECTLY needed for neuron conduction?

A: Nucleus
B: Axons
C: Dentrites
D: Cell membranes

Thanks so much guys! =D

-
b
b
c
c
a
a
neither dendrite or the nucleus are DIRECTLY needed for conduction
e.g. axo-axonic synapse
1
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