Nervous System Flashcards
Human Physiology: What keeps our cells happy? OWN PTR
Homeostasis: ( OWN PTR)
O2,
Water,
Nutrients,
pH ( 7.4),
Temp (37.2C)
Removal of waste ( CO2)
How do cells survive? pH
With right environment !
* pH (Acidity and Alkalinity) affect cell function
* Too acidic (acidosis)- neurons unable to send messages
* Too basic (alkalosis) - neurons send uncontrolled messages
* DEATH results if pH levels are out of the range of (6.8 to 8.0)
What are 4 parts of CNS? BR + SP C
Cerebrum ( CC BS)
Cerebellum
Br Stem
Sp Cord
What makes up PNS? S + A
all N’s o/ side of Sp Cord:
- Somatic N’s
- Autonomic N’s
Is somatic NS voluntary ?
Yes
What are the 6 groups of Peripheral N’s?
Cranial N’s : (12 pairs
Cervical nerves ( 8 pairs)
Thoracic N’s ( 12 )
Lumbar N’s ( 5 )
Sacral N’s ( 5 )
Coccygeal N ( 1 pair)
What are the 4 lobes of the cortex( cerebrum)?
Frontal Lobe ( FPTO)
Parietal Lobe
Tempiral Lobe
Occipital lobe
Primary motor cortex ( in the front)
Central sulcus ( down the midline)
Somatasensory Cortex ( at the upper back)
What is function of Somatic NS?
receives SENSORY input and delivers MOTOR muscle output
What is received by the dorsal ( back) root of Sp C?
- SENSORY input
What is delivered via the ventral ( front) roots of the spinal cord
- MOTOR output to muscles.
Is the autonomic NS INVOLUNTARY?
Yes
What are the 2 groups of the Autonomic NS? S + P
- Sympathetic: fight, freeze, flight
- Parasympathetic: digestion, growth, immune responses, energy storage)
Brain and body communicate how? …….PSA HHP
- Peripheral Nervous System
- Somatic
- Autonomic
- Hormones
- Hypothalamus & Pituitary
- Pineal gland (melatonin)
What does the hypothalamus regulate? HORMONE
Hormone releases from the pituitary
What dose the brain need to be happy? 02 +
oxygen & nutrients (glucose) to the brain cells
How is the brain cared for and protected? CSF +
- The Blood Brain Barrier (BBB)
- Cerebrospinal Fluid (CSF)
- Glial cells
What crosses the BBB? Drugs +
- lipophilic drugs and small uncharged molecules can cross from blood capillaries to cerebrospinal fluid (CSF) - by diffusion
What is the role of TRANSPORTERS in the brain? GLUCOSE +
transports :Important nutrients - amino acids & glucose transported across to CSF
How is Cerebrospinal fluid (CSF) is made ? ( VENTRICLE)
by the choroid plexus (in lateral & third ventricles)
*** There are four ‘ventricles’ (lateral, third, fourth, cerebral aqueduct)
What is the role of CSF? ( CUSHION)
to provide nourishment and protection (cushioning) of neural tissue
After CSF has done its circuit: what happens? ( RETURN to HRT)
CSF is reabsorbed by the arachnoid villi (of subarachnoid space) into venous blood (return to heart)
- What are the 3 cranial and spinal meninges ( PAD)
dura mater,
arachnoid mater,
pia mater.
- they protect CNS
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