Exam 12: Nervous Tissue

Sensory receptors such as corpuscle of touch and tactile epithelial cells would be associated with neurons that are classified functionally as [dropdown 1] and structurally as [dropdown 2]. Dropdown 1 and 2 choices: bipolar interneuron motor multipolar sensory unipolar

What factors limit neurogenesis in the CNS of adults?

[dropdown 1] open in response to changes in membrane potential and are located in axolemma of all types of neurons.[dropdown 2] are only located in the membrane of synaptic end bulbs. Dropdown 1 choices: Leak channel Ligand-gated channels Mechanically gated channels Voltage-gated channels Dropdown 2 choices: Voltage-gated calcium channels Voltage-gated chloride channels Voltage-gated potassium channels Voltage-gated sodium channels

When an impulse arrives at the synaptic end bulb,the membrane becomes more permeable to [dropdown 1].The ion movement into the synaptic end bulbs causes [dropdown 2] of [dropdown 3] into the synaptic cleft. Dropdown 1 choices: calcium chloride potassium sodium Dropdown 2 choices: endocytosis exocytosis Dropdown 3 choices: electrons ions neurotransmitters protons

Excitatory postsynaptic potentials can occur if there is an influx of [dropdown 1] ions.Inhibitory postsynaptic potentials can occur if there is an influx of [dropdown 2 ] ions or an efflux of [dropdown 3] ions. Dropdown 1,2 & 3 choices: phosphate chloride potassium sodium

Depolarization is represented by [dropdown 1].Repolarization is represented by [dropdown 2].After-hyperpolarization is represented by [dropdown 3 ]. Dropdown 1,2,& 3 choices: -70mV $\rarr$ -90mV -55mV $\rarr$ +30mV +30mV $\rarr$ -70mV

Once the membrane potential reaches a threshold voltage,hundreds of voltage-gated [dropdown 1] channels in that region of the membrane to open briefly.[dropdown 2] ions flood into the cell,completely [dropdown 3] the membrane. Dropdown 1choices: calcium chloride potassium sodium Dropdown 2 choices Calcium Chloride Potassium Sodium Dropdown 3 choices: depolarizing hyperpolarizing repolarizing

Describe the events that occur with the voltage-gated sodium channel during the depolarizing phase of an action potential.

Describe the difference between spatial and temporal summation in a postsynaptic neuron.

The motor portion of the autonomic nervous system can be divided into

List the three major factors that contribute to the creation of the resting membrane potential in excitable cells.

Describe four ways drugs can modify the effects of neurotransmitters.

List the three ways that neurotransmitters can be removed from a synapse.

As the action potential nears its peak,the voltage-gated [dropdown 1] channels close,and voltage-gated [dropdown 2] channels open,allowing cations to flow out of the cell to restore the resting membrane potential. Dropdown 1& 2 choices: calcium chloride potassium sodium

Mechanically-gated channels are located at letter [dropdown 1] in this diagram and will be involved with the formation of [dropdown 2]. Dropdown 1 choices: A B D E Dropdown 2 choices: an action potential a graded potential

What specific type of unipolar neuron detects a sharp pain?

Integration of information will occur in the [dropdown 1] of the spinal cord and brain,and is performed by unmyelinated [dropdown 2] neurons. Dropdown 1 choices: gray matter white matter Dropdown 2 choices: bipolar multipolar pseudounipolar unipolar