This set of Human Anatomy Questions and Answers for Aptitude test focuses on “Structure & Development of the Nervous System”.
1. What is the structural and functional unit of the nervous system?
Explanation: Neuron is the nerve cell with all its branches. It is the structural and functional unit of the nervous system and is longest sized (100cm) body cell of human.
2. Nerve cell does not divide because they do not have___________
c) Golgi body
Explanation: Centrosome is responsible for cell division. Since it is absent in nerve cell they lack the ability to divide.
3. Node of Ranvier is found in __________
a) Muscle bundles
c) Right auricles
Explanation: Node of Ranvier is found in axons. Node of Ranvier is the microscopic gap between the glial cells if mycelin sheath.
4. How many types of neurons are present?
Explanation: There are three types of neurons are present. They are sensory neurons, association neurons and motor neurons.
5. Neurotransmission through a synapse is always from ____ to _____
a) Axon, Dendron
b) Dendron, Axon
c) Brain, spinal cord
d) Spinal cord, brain
Explanation: Neurotransmission is the process by which signaling molecules are released by axon terminal. It is also called synaptic transmission.
6. Reflex action is controlled by ____________
a) Spinal cord
d) Sympathetic nervous system
Explanation: Reflex action is an involuntary and nearly instantaneous movement in response to the stimulus. A reflex is made possible by a neural pathway called reflex arc.
7. Connection between axon and dendrite is called _________
d) Tight junction
Explanation: Synapse is a structure that permits a neuron to pass an electrical or chemical signal to another neuron. Synapse is essential for neuronal function.
8. From where does the formation of a neural tube take place?
d) Spinal cord
Explanation: Neuralation is a formation of neural tube from ectoderm of embryo. It follows gastrulation in all vertebrates.
9. The anterior end of neural tube becomes ____________
a) Spinal cord
Explanation: The anterior end of the neural tube becomes brain. The posterior end of the neural tube becomes spinal cord.
10. Neuronal migration is the method by which neurons travel from their origin to their final position.
Explanation: Neuronal migration is the method by which neurons travel from their origin or birth place to their final position in the brain. There are several ways like radial migration, axophilic migration, tangential migration etc.
11. Which is not true of glial cells?
a) Neuron support cells
b) Retain ability to divide in adults
c) Are not able to divide in adults
d) Develop from glioblasts
Explanation: Glial cells are also called neuroglial cells. Glial cells surround neurons and provide support and insulation between them.
12. How many laminae are present in the grey matter of spinal cord?
Explanation: Grey matter is a major comment of the central nervous system. It consists of neuronal cell bodies, neurophil, glial cells, synapses and capillaries.
Sanfoundry Global Education & Learning Series – Human Anatomy and Physiology.
To practice all areas of Human Anatomy for Aptitude test, here is complete set of 1000+ Multiple Choice Questions and Answers.