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The Neuron: Building Block of the Nervous System
The Neuron: Building Block of the Nervous System

... The Action Potential  All-or-None Principle – Refers to the fact that the ...
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M.learning.hccs.edu

... C) the neurolemma is impermeable to most molecules. D) ependymal cells restrict the flow of interstitial fluid between the capillaries and the neurons. E) astrocytes form a capsule around neurons. 20. Which ...
Learning objectives Diencephalon
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...  Thalamic syndrome: Abnormal voluntary movements (chorea or hemiballismus) with hemisensory disturbance  Thalamic hand; The contralateral hand is held in an abnormal posture in some patients ...
Central nervous system (CNS)
Central nervous system (CNS)

... that secrete hormones that regulate growth, development, and homeostasis. This system uses chemicals.  Gland: a group of cells that make special chemicals for the ...
Chapter 24
Chapter 24

... 19. The innermost membrane surrounding the spinal cord, and containing blood vessels that nourish the cord, is the A) arachnoid. B) dura mater. C) myelinoid. D) menix. E) pia mater. 20. The brain area that contains reflex centers for breathing and cardiovascular functions is the A) cerebrum. B) cere ...
Neurons
Neurons

... Nervous systems have two categories of cells: • Neurons, or nerve cells, are excitable— they generate and transmit electrical signals, called action potentials. • Afferent neurons carry sensory information into the nervous ...
C. elegans
C. elegans

... The Cx1 processes have chemoattractants to guide Ti1 neuron outgrowth ...
C Fiber Stimulation
C Fiber Stimulation

... The two types of C fibers are Dorsal root and Sympathetic. 1. Dorsal root fibers serve the modality of pain, warm and cold temperature, and touch. 2. The sympathetic type involves postganglionic sympathetic fibers. The pain produced by C fibers is characterizized as dull, often poorly localized and ...
Nervous System
Nervous System

... Ependymal cells form a membrane that lines the ventricles (chambers) of the brain and the central canal of the spinal cord. Assist in producing, circulating, and monitoring of cerebrospinal fluid ...
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The Central Nervous System

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Chapters 31 and 34 - Nervous Endocrine

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Exam

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Chapter 14
Chapter 14

... 1. The three structural types of neurons are unipolar (one process extends from the cell body), bipolar (two processes extend from the cell body), and multipolar (three or more processes extend from the cell body). The three functional types of neurons are sensory neurons (afferent, unipolar, and bi ...
Practice Exam 3 ANSWERS
Practice Exam 3 ANSWERS

... a. is propagated by the opening of voltage-gated sodium channels b. occurs whenever a pre-synaptic nerve fires a charge to a post synaptic nerve c. is carried out only whenever half of the neural threshold is reached d. moves bidirectionally away from the cell body 4. Saltatory conduction is made po ...
Chapter 6 Body and Behavior
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... • The nervous system is never at rest. There is always a job for it to do. Even when you are sleeping the nervous system is busy regulating your body functions. The nervous system controls your emotions, movements, thinking and behavior. ...
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... The brainstem consists of the midbrain, pons and the medulla oblongata The midbrain receives and integrates several types of sensory information and sends it to specific regions of the forebrain A major function of the pons and medulla is to transfer information between the PNS and the midbrain and ...
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The Nervous System
The Nervous System

...  Larger portion of the brain that provides higher level mental ...
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Introduction to the Nervous System Guided Notes are masses of
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... (2) _____________ neurons - Efferent neurons that make up efferent component of the PNS; carry instructions from the CNS to the peripheral effectors. (1) ________________ motor neurons – innervate skeletal muscle (conscious control – Somatic Nervous System) (2) _____________ motor neurons – innervat ...
Neuron Note #3 - WordPress.com
Neuron Note #3 - WordPress.com

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Hypothalamic arcuate nucleus: neurons in the meeting
Hypothalamic arcuate nucleus: neurons in the meeting

... Neurons in the arcuate nucleus receive neuronal and humoral inputs. The neuronal signals can be classified as intranuclear (internal organization of cells for common response to proper stimuli), hypothalamic (mainly from the paraventricular, periventricular and ventromedial nuclei, and from cells in ...
NERVOUS SYSTEM - Welcome to SBI4U with Ms. Taman!
NERVOUS SYSTEM - Welcome to SBI4U with Ms. Taman!

... • Sympathetic nervous system also stimulates secretion of epinephrine and nor-epinephrine from the medulla of the adrenal glands • Prepares body for “flight or fight” response • “Epi-pen” given in allergic reactions as it relaxes constricted airways ...
The Nervous System
The Nervous System

...  9b.Students know how the nervous system mediates communication between different parts of the body and the body’s interactions with the environment.  9d.Students know the functions of the nervous system and the role of neurons in transmitting electrochemical impulses.  9e.Students know the roles ...
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Circumventricular organs

Circumventricular organs (CVOs) are structures in the brain that are characterized by their extensive vasculature and lack of a normal blood brain barrier (BBB). The CVOs allow for the linkage between the central nervous system and peripheral blood flow; additionally they are an integral part of neuroendocrine function. The lack of a blood brain barrier allows the CVOs to act as an alternative route for peptides and hormones in the neural tissue to the peripheral blood stream, while still protecting it from toxic substances. CVOs can be classified into (a) sensory and (b) secretory organs. The sensory organs include the area postrema (AP), the subfornical organ (SFO) and the vascular organ of lamina terminalis. They have the ability to sense plasma molecules and then pass that information into other regions of the brain. Through this, they provide direct information to the autonomic nervous system from the systemic circulation. The secretory organs include the subcommissural organ (SCO), the posterior pituitary, the pineal gland, the median eminence and the intermediate lobe of the pituitary gland. These organs are responsible for secreting hormones and glycoproteins into the peripheral vascular system using feedback from both the brain environment and external stimuli.All of the circumventricular organs, besides the SCO, contain extensive vasculature and fenestrated capillaries which leads to a ‘leaky’ BBB at the site of the organs. Furthermore, all CVOs contain neural tissue, allowing them to play a role in the neuroendocrine system. It is highly debated if the choroid plexus can be included as a CVO. It has a high concentration of fenestrated capillaries, but its lack of neural tissue and its primary role of producing cerebrospinal fluid (CSF) usually excludes the choroid plexus from the CVO classification.Research has also linked CVOs to body fluid regulation, cardiovascular functions, immune responses, thirst, feeding behavior and reproductive behavior.
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