The central nervous and peripheral nervous systems process information in three

Question

The central nervous and peripheral nervous systems process information in three stages sensory input integration motor output None of these all of these Action potentials in myelinated axons appear to jump from one node of Ranvier to another. This is called ____ conduction. salutatory salubrious springing myelogenous saltatory Identify the node of Ranvier Identity a dendrite Identify the axon terminal Identify the nucleus of the neuron Identify the cell body The electrical insulation that surrounds axons is called Schwann cells synapses oligodendrocytic plaques myelin axon sheaths Branched ends of the axon transmits information to another cell at a junction called the glia siphon synapse myelin plaque What do proximate explanations of behavior focus on? How displays and other types of behavior have changed through time. The functional aspect of a behavior, or its "adaptive significance". Genetic, neurological, and hormonal mechanisms of behavior. Psychological interpretations of behavior. Which of the following statements about the waggle dance of the honeybee is not correct? The length of a waggling run is proportional to the distance from the hive to a food source. Sounds and scents produced by the dancer provide information about the nature of the food source. No elements of the round dance are used. The orientation of the waggling run provides information about the direction of the food from the hive, relative to the Sun's position. What does Hamilton's rule specify? Why animals do things 'for the good of the species'. Why reciprocal altruism can lead to fitness gains for unrelated individuals. When alleles that favor self-sacrificing increase in frequency via kin selection. The condition under which more complex behaviors evolve from simpler behaviors. What evidence suggests that there is a critical period for song learning in some bird species? In and Mockingbirds, individuals continue to sing new songs throughout their lives. Individuals do not learn to sing normally unless they are allowed to hear themselves practice. Individuals that never hear their species-specific song can still sing normally as adults. Birds that are deafened soon after hatching never sing normally, but birds that are deafened several months after hatching never sing normally, but birds that are deafened several months after hatching sing normally. Which of the following is true of behaviors? Their expression is only weakly influenced by genes. They occur with or without environmental stimuli. They occur in some vertebrates but not mammals. They are expressed in most individuals in a population.

Explanation / Answer

37) E

Sensory input, integration and motor output are three overlapping functions of the nervous system. Sensory input is given by the eyes, ears, nose to the central nervous system where it is integrated and a motor neuron output is given for carrying out the body's response to external stimuli. The nerves which communicate the sensory input and motor output are referred as peripheral nervous system.

38) E

Saltatory conduction is a faster way for electrical signals to travel down the axons, and this is favoured by the myelin sheaths that cover the axons.

39) E

Node of ranvier are gaps in myelin sheaths that help fast conduction of electrical impulses

40) A

Dendrites are brances of neuron that receive signals from other neurons.

41) B

Axon terminals are endings via which axons make synaptic contact with other nerve cells.

42) D

Nucleus of neuron is present in the center of the cell body and contains the genetic material.

43) C

Cell body or soma is the spherical part of the neuron which contains nucleus and other organelles.

44) D

Myelinis the insulation that helps increase the speed nerve impulses.

45) C

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