### process | reaction:

Serious reaction
* can also occur when latex enters the bloodstream.
* includes fevers.

Severe reaction
* More severe reactions can include heart failure, enteritis, and ascending posterior paralysis.
* are preventable by early detection and treatment of low blood sugars
  - rare in children
  - very rare in children
* are very rare, but can include serious allergic reactions
  - severe allergic reactions or severe brain reactions
* can cause difficulty breathing, coma, and death
  - occur if diethylcarbamazine is given to a dog with adult heartworms
* occurs at time.

Similar reaction
* control the solubility of Mn in the soil solution.
* take place with amines and amino acids.

Soil reaction
* is generally alkaline
  - related to the availability of soil minerals to plants
* is strongly acid or medium acid
  - very strongly acid
  - to extremely acid in unlimed areas
* is very strongly acid to slightly acid
* measure of acidity or alkalinity and is expressed as a range in pH values.
* vary from alkaline to slightly acid.

Substitution reaction
* can be of many different types.
* result in the replacement of an O with a N or another atom.
  * In chemistry a 'substitution reaction' happens when an atom or a group of atoms is replaced by a different one. Substitution reactions can be of many different types.

Systemic reaction
* are difficult to reverse once they develop
  - unlikely as very little of the lidocaine is absorbed into the body
* range from hives, muscle and joint pain, nausea, fever, and chills.

Toxic reaction
* Some toxic reaction occurs in animals.
* are common and are related to damage to the nervous system
  - more likely to occur after parenteral administration
* can be very different in humans and pets.
* leads to severe sickness

Tropism
* allow plants to adjust the direction of growth when their environment changes.
* are the ability to grow toward or away from some specific stimulus.
* cause the ivy to twine.
* occur in apes and taxes occur in bees.

### process | reaction | tropism:

Phototropism
* describes the plant's tendency to grow toward light.
* growth of a plant toward a unidirectional light source.
* is a. the effect of light on seed germination b
  - common in plants , but can also occur in other organisms such as fungi
* is growth as a result to exposure to light
  - of roots away from the light
  - known to take place throughout the life of a plant
  - one of the many plant tropisms or movements which respond to external stimuli
  - the growth of an organism which responds to a light stimulus
* is the movement of plant structures in response to light
  - plants in response to sunlight
  - natural inclination of plants to grow towards the light source
* is the tendency for plant organs to bend in response to a directional light source
  - of a plant to move toward light
* only happens in stem.
* refers to a plant's ability to lean and grow toward the light.
  * is common in plants, but can also occur in other organisms such as fungi. The cells on the plant that are farthest from the light have a plant growth hormone called auxin, which causes phototropism to occur. It causes the plant to have 'elongated cells' on the farthest side from the light.
  * is one of the many plant tropisms or movements which respond to external stimuli. Growth towards a light source 'positive phototropism', while growth away from light is called 'negative phototropism'. Most plant shoots have positive phototropism. Roots usually have negative phototropism, though gravitropism may play a larger role in root behavior and growth. Some vine shoot tips exhibit negative phototropism, which allows them to grow towards dark, solid objects and climb them.

### process | reaction | tropism | phototropism:

Positive phototropism
* is the way a plant grows towards the light.
* maximizes the amount of light that can be absorbed by a plant.