Chapter 12- Nervous Tissue
Neurons that are rare, small, and lack features that distinguish dendrites from axons are called a. multipolar b. anaxonic c. bipolar d. tripolar e. unipolar
B
The axon is connected to the soma at the a. collaterals b. axon hillock c. synapse d. synaptic terminal e. telodendria
B
The basic functional unit of the nervous system is the a. axon b. neuron c. nerve d. receptor e. glial cell
B
What type of synapse is most common in the nervous system? a. processing b. chemical c. radiative d. electrical e. mechanical
B
Which Neurotransmitter has a direct effect on opening chloride channels? a. serotonin b. GABA c. norepinephrine d. dopamine e. endorphins
B
Which neurotransmitter has widespread effects on a person's attention and emotional state? a. GABA b. serotonin c. dopamine d. endorphins e. norepinephrine
B
_______ monitor the position of the skeletal muscles and joints. a. pressoreceptors b. proprioceptors c. exterceptors d. photoreceptors e. internoceptors
B
In a(n) _________ synapse, current flows directly between cells. a. cell b. electrical c. chemical d. gap e. osmotic
B
Cholinergic synapses release the neurotransmitter a. GABA b. serotonin c. acetylcholine d. norepinephrine e. adrenalin
C
The ______ nervous system controls the skeletal muscles. a. afferent b. autonomic c. somatic d. parasympathetic e. sympathetic
C
The equilibrium potential of sodium is a. -70mV b. -90mV c. +66mV d. -65mV e. +30mV
C
Sensory Information from skeletal muscles travel over _______ fibers. a. Type D b. Type E c. Type B d. Type A c. Type C
D
The molecule responsible for making cyclic AMP is called a. G-protein b. anandamide c. adenosine synthase d. adenylate cyclase e. adenosine
D
Voltage-gated sodium channels have both an activation gate a(n) _________ gate. a. repolarization b. threshold c. swinging d. inactivation e. ion
D
When Cholinergic receptors are stimulated, a. sodium ions leave the postsynaptic neuron b. chloride ions leave the postsynaptic neuron c. norepinephrine deactivates acetylcholine d. sodium ions enter the postsynaptic neuron e. chloride ions enter the postsynaptic neuron
D
Glial cells that surround neurons in ganglia are a. satellite cells b. ependymal cells c. oligodendrocytes d. microglia e. astrocytes
A
Rapid impulse conduction from "node" to "node" is called a. saltatory propagation b. continuous propagation c. spatial propagation d. divergent propagation e. synaptic transmission
A
Which of the following is a type of glial cell found in the peripheral nervous system? a. satellite cells b. oligodendrocytes c. microglia d. astrocytes e. ependymal cells
A
Which of the following statements about the action potential is false? a. the rapid depolarization phase is caused by entry of potassium ions b. during the depolarization phase, membrane potential becomes positive. c. during the repolarization phase, sodium channels close and potassium channels open d. during the hyperpolarization phase, the ion pumps re-establish the sodium and potassium concentrations across te cell membrane. e. repolorization occurs as potassium ions leave the axon.
A
Which area of the graph shows when membrane potential approaches the potassium equilibrium potential? a.1 b.3 c.2 d.4
D. 4 is approaching more negative that -70 and the equilibrium potential is -90
In______, activity at an axoaxonic synapse increases the amount of neurotransmitter released when an action potential arrives at the axon terminus. a. spacial facilitation b. spatial summation c. temporal summation d. presynaptic inhibtion e. presynaptic facilitation
E
Small, wandering cells that engulf cell debris and pathogens in the CNS are called a. ependymal b. astrocytes c. oligodendrocytes d. satellite cells e. microglia
E
The site in the neuron where EPSPs and IPSPs are integrated is the a. synaptic terminal b. dendritic membrane c. chemical synapse d. electrical synapse e. axon hillock
E
The sum of the electrical and chemical forces acting on an ion is known as its a. thermodynamic difference b. summation difference c. action potential d. permeability gradient e. electrochemical gradient
E
