What responses are generated by the nervous system when you run on a treadmill? Include an example of each type of tissue that is under nervous system control.

Cardiac muscle cells have a longer refractory period than skeletal muscle cells.  This ensures that the heart is able to relax between contractions.  What would happen if the heart were not able to relax between contractions? The heart would no longer pump blood – because without relaxation, the heart cannot fill with blood. No change in heart function – contractions are the important part. The heart would pump more blood out with each heartbeat.

refers to the ability of neurons to respond to different stimuli. excitability secretion conductivity elasticity OO00

The Purkinje cell is an example of this type of neuron. sensory neuron pyramidal neuron Oprincipal neuron Obipolar neuron

In what segment(s) do you find the following: sodium-potassium pump, leak channels, chemically gated channels, and voltage gated channels? (Receptive segment, initial segment, conductive segment, and transmissive segment.)

What is the term used to describe the state of an axon in the later phase of an action potential during which an increase in current is required to produce another action potential? partially inhibited refractory relatively refractory disequilibriated refractory relatively disinhibited refractory

What do gustatory epithelial cells have in common? they sense tastants using activation of ion channels they sense tastants using activation of G-protein coupled receptors a change in pH activates the cells they release neurotransmitters in response to depolarization

The neuron cell is made up of which of the following parts?     Axon     Dendrite     Soma     All of the above

What causes Hyperpolarization following the spike of the action potential? Voltage-gated K+ channels close slowly allowing K+ ions to leave the cell The opening of leaky Na+ channels The Na+/K+ pump briefly reverses the direction of ion flow Both Na+ channels and K+ channels become inactivated Na+ and Cl- enter the cell until the Na+/Cl- pump closes

The blood brain barrier can be attributed primarily to which cell type? Tight junction between Smooth muscle cells of the vasculature wall Tight junction between astrocytes Gap junction between glial cells O Tight junction between Endothelial cells