Multicellular Organisms pt2 Flashcards
(37 cards)
Sensory neurons
Carry electrical impulses from sense organs (receptors) to the CNS
Inter neurons
Carry impulses from sensory neurons to motor neurons
Motor neurons
Carry eletrical impulses from CNS to mucle or glands (effector)
Synapse
Occurs between neurons
What carries the messages sent by eletrical impulses between the neurons and the synapses
Chemicals
What is the endocrine system
It influences almost every cell and organ in the body.controls process that happen slowly
The main part of the endocrine system are
Glands, organs and hormones
Glands release what into the blood stream
Hormones
Hormones are…
Chemical messengers in the blood e.g ADH
Target tissues have….
Receptors for the hormones so only specific tissues are effected by specific hormones
Glucose is…
A sugar released during the break down of carbohydrates that provides the body with energy
How can glucose be stored
As fat or glycogen in the liver
The level of glucose in the blood is controlled by…
Hormones
If a rise of blood sugar is detected
The pancreas sends insulin in the blood to convert the glucose into glycogen
If blood sugar drops…
The pancreas produces glucagon that breaks down glycogen into glucose
Gametes are…
Specialised cells
Gametes contains….
Half the genetic information of a normal body cell
Cells that contain only half of the genetic information are called..
Haploids
Normal cells are referred to as
Diploid
Cells need to be replaced when…
They become too old to function
Cells are replaced by…
Existing cells dividing
Mitosis is…
The division of the nucleus
At stage one of mitosis…
The DNA is uncoiled
At stage two of mitosis…
Chromatids apear
