OFF bipolar cells express glutamate receptors at their synapses with photoreceptors and are in the dark. metabotropic voltage-gated ionotropic mechanically-gated
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- Figure 35.3 Which of the following statements is false? The soma is the cell body of a nerve cell. Myelin sheath provides an insulating layer to the dendrites. Axons carry the signal from the soma to the target. Dendrites carry the signal to the soma.An on center bipolar cell ________ when light is on the center of its receptive feild, because it is _______ glutamate Select one: a. depolarizes; inhibited by b. hyperpolarizes; activated by c. depolarizes; activated by d. hyperpolarizes; inhibited by e. maintains its resting membrane potential; excited byThe ___________________ provides electrical insulation that allows faster propagation of nerve impulses. regarding signal transduction mechaniscm in neurons.
- Odor molecule receptors are located on the ________ extending from olfactory receptor cells in the human nose. Multiple Choice a) axon b) cilia c) soma d) synapse e) oligodendrocyteA ________ potentail is a local, graded depolarization in a receptor cell triggered by the threshold stmulus opening the ion channels generator graded action positiveWhen Na+ channels in hair cells open ______. Na+ diffuses into the cells Na+ diffuses out of the cells equal amounts of Na+ and Cl- move in both directions
- The receptive field of a P cell is than the receptive field of an ipRGC. Fill in the blank A. Larger B. Smaller1. This question asks you about a typical neuron and NOT photoreceptors. As stimulus intensity is increased, recording from a single neuron USUALLY shows the amplitude of the action potential increases. the amplitude of the action potential decreases. the amplitude of the action potential may increase or decrease, depending on the stimulus. the rate of firing of the nerve fiber increases. 2. An inhibitory transmitter _______ the firing rate of a neuron and an excitatory transmitter ________ the firing rate. increases; decreases increases; increases decreases; decreases decreases; increasesGiven these events:(1) Bipolar cells depolarize.(2) Glutamate release from presynaptic terminals of photoreceptorcells decreases.(3) Light strikes photoreceptor cells.(4) Photoreceptor cells are depolarized.(5) Photoreceptor cells are hyperpolarized.Choose the arrangement that lists the correct order of events, startingwith the photoreceptor cells in the resting, nonactivated state.a. 1,2,3,4,5 b. 2,4,3,5,1 c. 3,4,2,5,1 d. 4,3,5,2,1 e. 5,3,4,1,2
- What characteristic distinguishes dendrites from axons?a. Presence of branches at the tipsb. Direction of impulse transmission relative to cell bodyc. Whether they direct impulses toward or away from the braind. Presence of sodium channels in the cell membraneThe concept cells that activate to a picture of Charlie Brown will most likely activate to what other stimuli? a. A picture of Homer Simpsonb. A picture of Snoopyc. A picture of Jim from the officed. A picture of another cartoon bald kidIn the complete absence of light, a rod will become strongly depolarized and increase its release of neurotransmitters become strongly hyperpolarized and decrease its release of neurotransmitters become strongly hyperpolarized and increase its release of neurotransmitters become strongly depolarized and decrease its release of neurotransmitters None of these