What part of the nerve cell sends signals away from the cell body O None of these is correct O Dendrites O Mitochondria O Nerves O Axons

1.25 p Question 22 Which statement below best describes why action potentials travel in only one direction? O The all-or-none principle explains this. O They have a refractory period. O The diameter of the axon explains this. O Only sodium- and potassium-gated channels are found on the axon. O They have myelinated axons. • Previous Next Not saved Submi

Which of the following does NOT apply to a neuron? O cell body O chromatophilic substance sarcoplasmic reticulum O dendrite synaptic vesicle DELL O.

Researchers have designed a neuron that's unable to produce and release neurotransmitters. Can that neuron still have an action potential? Choose the answer with the correct answer and the correct reasoning. O No, action potentials need neurotransmitters to increase message speed O No, a neuron can't receive messages without its own neurotransmitters O No, a lack of neurotransmitters would leave a neuron unmyelinated O No, action potentials don't occur in the axon O Yes, action potentials don't require neurotransmitters:

|26 Which protein is NOT attached to the vesicle? O a. Synaptobrevin O b. SNARES VAMP O d. Syntaxin O e. Synaptotagmin Spatial summation is adding all of the IPSPS and EPSPS that arrive at any time on a cell. Select one: O True O False |3p Which area is responsible for proprioception (the ability to know where your body is in space) Select one: O a. Occipital Lobe O b. Frontal Lobe O c. Temporal Lobe O d. Parietal Lobe |31 Match the following terms to their definitions Resting membrane potential Choose. -55mV Pushes the charge away from threshold (more negative) -70MV Absolute Refractory period Inhibitory post-synaptic potential Excitatory post-synaptic potential Relative refractory period Pushes the charge towards threshold (less negative) Period when a cell cannot produce another action potenti

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What sort of cellular changes would you expect a sailor sick with scurvy to experience? O Their collagen (an extracellular matrix component) would be diminished, resulting in fewer binding sites for integrins. The end result would be less adherent cells. O Their collagen (a cytoskeletal fiber) would be diminished, resulting in a loss of contractile motion within the cell, affecting both cell migration and muscle function.

What is a synaptic vesicle? O Itis a membrane-bound package of neurotransmitters located in the pre-synaptic cell. It is a package of excitatory ions located in the post-synaptic cell. O t is a package of inhibitory ions located in the post-synaptic cell. O It is an organelle that stores calcium.

What pathway has signals moving through sensory nerves to the CNS O Afferent O Interneurons O Efferent O None of these is correct O Motor

What is the actual “signal” that is being transduced inany signal transduction pathway, such as those shownin Figures 11.6 and 11.10? In what way is this information being passed from the exterior to the interior ofthe cell?