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NSC 1306 Exam 2 questions with actual answers.
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NSC 1306 Exam 2 questions with actualanswers.
______ is the most common inhibitory neurotransmitter, while ______ is the most common excitatory
neurotransmitter in the mammalian nervous system. ANS - GABA, glutamate
When a neurotransmitter molecule binds to a(n) _______ receptor, associated ion channels open and
close immediately thereby inducing an immediate potential ANS - ionotropic
In order, the three phases of an action potential are (3) ANS - Rising phase
repolarization
hyperpolarization
Active energy consuming mechanisms in the neural membrane that continuously transfer Na+ ions out
of the neuron and K+ ions into the neuron are _____________ ANS - sodium-potassium pumps
The process of neurotransmitter release is known as ______ ANS - exocytosis
Which of the following is a catecholamine?
1. serotonin
2. dopamine
3. acetylcholine
4. anandamide ANS - 2. dopamine
Adding or combining a number of individual signals into one overall signal is called ______.
1. amalgamation
2. integration
3. assimilation
4. summation ANS - Integration
,Which class of neurotransmitters is synthesized from a single amino acid and has cell bodies frequently
located in the brain stem?
1. monoamines
2. aspartate
3. acetylcholine
4. glutamate ANS - Monoamines
Any molecule that binds to a particular receptor is referred to as a(n) _____ of that receptor.
1. extension
2. ligand
3. peptide
4. antagonist ANS - ligand
Salts in neural tissue that separate into positively and negatively charged particles are called ______.
1. neutrons
2. ions
3. protons
4. electrons ANS - ions
An action potential is generated
1. in the axon hillock
2. at the neurotransmitter
3. at the synapse
4. at the axon initial segment ANS - at the axon initial segment
What do the plus signs indicate in each Na+ and K+ ion?
1. carries a single positive charge
2. ion is considered unstable
, 3. carries more than one positive charge
4. ion is considered neutral ANS - carries a single positive charge
nicotinic and muscarinic receptors are two subtypes of _____ receptors ANS - acetylcholine
The transmission of EPSP's and IPSP's is ________, meaning that they decrease in amplitude as they
travel through the neuron
1. incremental
2. weak
3. poorly charged
4. decremental ANS - decremental
The ions in neural tissue are in constant random motion, and particles in random motion tend to
become evenly distributed because they are more likely to move down their ____________ than up
them
1. electrostatic pressure
2. ion channels
3. resting potential
4. concentration gradients ANS - concentration gradients
neuropeptides are large-molecule neurotransmitters that are composed of ______
1. glutamate
2. acetylcholine
3. glycine
4. amino acids ANS - amino acids
The difference in the electrical charge between the inside and the outside is the ______ potential
1. excitatory
2. resting
3. membrane
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