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Chapter: 07. Nervous System

⁠
Multicellular organisms exercise chemical control through hormones using the _ _ _ _ _ _ _ _ _ _ _ _ _ _ system.
Endocrine
A _ _ _ _ _ _ _ _ _ _ _ _ _ _ is an information received by the nervous system about the conditions in the environment inside or outside the body.
Stimulus
Normal control over the functioning of body tissues and organs at the correct speed and sequence simultaneously is known as _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Coordination
The structural and functional units of the nervous system are called _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Neurons (or Nerve cells)
Several finger-like projections branching out from the cyton are called _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Dendrons
Axons are surrounded by a spirally-coiled sheath of fatty substance called the _ _ _ _ _ _ _ _ _ _ _ _ _ _ sheath.
Myelin (or Medullated)
The regular constrictions found along the length of an axon are known as _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Nodes of Ranvier
Dendrites receive impulses from neighbouring neurons and conduct them to the cyton, which is called an _ _ _ _ _ _ _ _ _ _ _ _ _ _ process.
Afferent
The point of contact between terminal branches of an axon and dendrites of an adjacent neuron is called a _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Synapse
A bundle of nerve fibres wrapped in a sheath of connective tissue is called a _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Nerve
Nerves that contain only sensory nerve fibres, such as the optic nerve of the eye, are called _ _ _ _ _ _ _ _ _ _ _ _ _ _ nerves.
Sensory
The nerve going to the lower jaw, face, neck, and salivary glands is an example of a _ _ _ _ _ _ _ _ _ _ _ _ _ _ nerve.
Mixed
The process in which receptors convert environmental stimuli into electrical nerve impulses is called _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Transduction
The brain is protected by three membranes called _ _ _ _ _ _ _ _ _ _ _ _ _ _ and is enclosed in a bony skull.
Meninges
The outer layer of the brain is formed of _ _ _ _ _ _ _ _ _ _ _ _ _ _ matter, which is mainly composed of the cell bodies of neurons.
Gray
The folds and grooves present in the wall of the cerebral hemispheres are called _ _ _ _ _ _ _ _ _ _ _ _ _ _ and sulci respectively.
Gyri
The human cerebrum is estimated to contain about _ _ _ _ _ _ _ _ _ _ _ _ _ _ billion neurons.
Nine
The part of the brain located at the back of the cerebrum that coordinates voluntary movements is the _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Cerebellum
The posterior-most part of the brain is called the medulla oblongata or the _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Brain stem
In the spinal cord, the gray matter is centrally located in an _ _ _ _ _ _ _ _ _ _ _ _ _ _ region.
H-shaped
There are _ _ _ _ _ _ _ _ _ _ _ _ _ _ pairs of cranial nerves that arise from the brain and supply different parts of the head.
12 (Twelve)
The peripheral nervous system of humans contains _ _ _ _ _ _ _ _ _ _ _ _ _ _ pairs of spinal nerves.
31 (Thirty-one)
The sympathetic and parasympathetic nervous systems are described as _ _ _ _ _ _ _ _ _ _ _ _ _ _ because they have opposite effects on the same organ.
Antagonistic
Parasympathetic nerves arise from the brain, as well as the cervical and _ _ _ _ _ _ _ _ _ _ _ _ _ _ regions of the spinal cord.
Sacral
The specific chemical neurotransmitter that propagates nerve impulses across the synaptic gap is _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Acetylcholine
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