The nervous system
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What are the two main parts of the nervous system?
The Central nervous system
The Peripheral nervous system
What tissue does the nervous system consist of?
What does the central nervous system consist of?
The spinal cord and the brain
What is the central canal?
The narrow central cavity that persists within the spinal cord
All other nerves including the cranial and spinal nerves are in which of the two nervous systems?
An afferent nerve is also described as what?
Sensory nerve. It carries impulses towards the CNS
An efferent nerve is described as what?
Motor nerve. It carries impulses toward organs and away from the CNS.
What is a receptor?
a dendrite. It monitors specific characteristics of the environment
Describe the Somatic Neverous System
controls the skeletal muscles contractions
describe the Autonomic Nervous system
regulates smooth muscle, cardiac muscle and glandular activity.
What are the 5 Sensory organs?
- 1. Eyes: photoreceptors
- 2. Taste Buds: chemoreceptors
- 3. Ear- specialized mechanoreceptors
- 4. Touch: mechanoreceptors
- 5. Smell, olfaction: chemoreceptors
What is the cell body also referred to as in the neuron?
Soma or the perikaryon
What are efferent neurons?
What are sensory neurons?
Are neurons the same as nerves?
No, its based on cell morphology
Which of these is not found in the CNS?
D) Schwann Cells
E) ependymal cells
What is grey matter?
Nerve cell bodies
What are axons covered with?
A) Lipoprotein called Myelin
B) Myelin Sheath
E) all of the above
Myelin, greasy covering
What is myelin manufactured by?
What are the kinds of Synapses?
- Axondendritic: Axons to dendrites
- Axosomatic: axons to cell bodies
- Axoaxonic: axons to axons
- Dendrodendritic: dendrites to dendrites
- Dendrosomatic: Dendrites to cell bodies
Nervous tissue is from what?
What does the Myelin Sheath do?
It covers the axons, helping it transport material faster.
Apoptosis is what?
What connects the two halves of the brain?
C) corpus callosum
D) Spinal cord
What does the thalamus do?
It is concerned with the relay of sensory information to the vasal nuclei and cerebral cortex.
What are the five functions of the Hypothalamus?
- Autonomic control center
- Emotional responses
- Body temperature control
- Food intake
- Water Balance and Thirst
- Sleep and wake cycles
Where are the hypothalamus and thalamus located?
Where is the brain stem located?
Which are not a fuction of the medulla oblongata?
A) Vegetive fuctions( breathing, heart rate)
E) Going to the bathroom
Going to the bathroom
What are the two divisions of the Autonomic Nervous system?
Parasympathetic and sympathetic
The epithalamus is?
forms the roof of the diencephalon. It contains the hormone secreting gland, pineal gland.
What system includes the amygdaloid?
the limbic system
Olfactory nerve is number what? and does what?
N1 and it's responsible for smell
The Optic nerve is what number and does what?
II, carries visual information
The oculomotor nerve is what number and does what?
III, Moves the eyeball
The troclear nerve is what number and does what?
IV the moves the superior oblique muscle of eye
The Trigeminal nerve is what number and does what?
V, mixes with branches. It's the largest cranial nerve
The abducens nerve is what number and does what?
moves the oculomotor muscle, the lateral rectus. VI
The facial nerve is what number and does what?
VII, controls muscles of scalp and face and receives taste information from the tongue.
The vestibulocochlear nerve is what number and does what?
VIII, monitors sensations of balance, position, and movement. Also monitors hearing receptors.
The Glossopharyngeal nerve is what number and does what?
IX, moves tongue and helps swallowing.
The vagus nerve is what number and does what?
X, has a variety of motor components
The accessory nerve is what number and does what?
XI, moves voluntary swallowing muscles
The hypoglossal nerve is what number and does what?
XII, provides voluntary motor control over tongue movements.
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