radial glia

Examples of radial glia in the following topics:

• Glia

  • The seven types of glia have specific functions that play a role in supporting neuron function.
  • When glia do not function properly, the result can be disastrous; most brain tumors are caused by mutations in glia.
  • There are several different types of glia with different functions .
  • Satellite glia provide nutrients and structural support for neurons in the PNS.
  • Radial glia serve as bridges for developing neurons as they migrate to their end destinations.

• Embryonic Development of the Brain

  • Radial fibers (also known as radial glia) can translocate to the cortical plate and differentiate either into astrocytes or neurons.
  • Instead these multipolar cells express neuronal markers and extend multiple thin processes in various directions independently of the radial glial fibers.

• Neuroglia of the Peripheral Nervous System

  • The two kinds of glia cells in the PNS, schwann cells and satellite cells, each have unique functions.
  • Satellite cells are small glia that surround neurons' sensory ganglia in the ANS.
  • PNS satellite glia are very sensitive to injury and may exacerbate pathological pain.

• Animal Characterization Based on Body Symmetry

  • Animals can be classified by three types of body plan symmetry: radial symmetry, bilateral symmetry, and asymmetry.
  • Radial symmetry is the arrangement of body parts around a central axis, like rays on a sun or pieces in a pie.
  • Radially symmetrical animals have top and bottom surfaces, but no left and right sides, or front and back.
  • All true animals, except those with radial symmetry, are bilaterally symmetrical.
  • This is termed secondary radial symmetry.

• Overview of Non-Uniform Circular Motion

  • The change in speed has implications for radial (centripetal) acceleration.
  • A change in $v$ will change the magnitude of radial acceleration.
  • The greater the speed, the greater the radial acceleration.
  • 2: The radial (centripetal) force is constant (like a satellite rotating about the earth under the influence of a constant force of gravity).
  • The important thing to note here is that, although change in speed of the particle affects radial acceleration, the change in speed is not affected by radial or centripetal force.

• Stress and Strain

  • If the charge is positive, field lines point radially away from it; if the charge is negative, field lines point radially towards it.
  • The above equation is defined in radial coordinates which can be seen in .
  • The electric field of a positively charged particle points radially away from the charge.
  • The electric field of a negatively charged particle points radially toward the particle.
  • The electric field of a point charge is defined in radial coordinates.

• Electric Field from a Point Charge

  • If the charge is positive, field lines point radially away from it; if the charge is negative, field lines point radially towards it .
  • The above equation is defined in radial coordinates, which can be seen in .
  • The electric field of a positively charged particle points radially away from the charge.
  • The electric field of a negatively charged particle points radially toward the particle.
  • The electric field of a point charge is defined in radial coordinates.

• Neuroglia of the Central Nervous System

  • Glia (named from the Greek for "glue") helps in supporting and scaffolding neurons, while performing  many unique functions.
  • In the human brain, it is estimated that the total number of glia roughly equals the number of neurons, although the proportions vary in different brain areas.

• Body Plans

  • Animal body plans can have varying degrees of symmetry and can be described as asymmetrical, bilateral, or radial.
  • They can be asymmetrical, radial, or bilateral in form .
  • Radial symmetry describes an animal with an up-and-down orientation: any plane cut along its longitudinal axis through the organism produces equal halves, but not a definite right or left side.
  • The sponge is asymmetrical, the sea anemone has radial symmetry, and the goat has bilateral symmetry.

• Pulse

  • Pulse is a measurement of heart rate by touching and counting beats at several body locations, typically at the wrist radial artery.
  • Pulse rate, or velocity, is usually measured either at the wrist from the radial artery and is recorded as beats per minute.
  • The pulse deficit (difference between heart beats and pulsations at the periphery) is determined by simultaneous palpation at the radial artery and auscultation at the heart apex.
  • Radial pulse is commonly measured using three fingers, the finger closest to the heart is used to occlude the pulse pressure, the middle finger is used get a crude estimate of the blood pressure, and the finger most distal to the heart is used to nullify the effect of the ulnar pulse as the two arteries are connected via the palmar arches.
  • Measurement of the pulse can occur at several locations, including the radial artery shown here.