Control & Communication Flashcards
Cells in multicellular organisms do not_________?
Cells in multicellular organisms do not work independently
What three parts is the human nervous system made up of?
The human nervous system is made up of
1 - the brain
2 - spinal cord
3 - associated nerves
The brain and spinal cord made up the (CNS)
What part of the nervous system do the brain and spinal cord make up?
The brain and spinal cord make up the central nervous system (CNS)
What connects the CNS to all parts of the body?
The CNS is connected to all parts of the body by nerves
What is the function of nerves?
Nerves transmit information to and from all parts of the body and systems
What part of the body has overall control?
The brain has overall control to make all parts work together as a whole
What is the flow of information in order?
1 - receptors (sense organs) 2 - sensory nerves 3 - CNS 4 - motor nerves 5 - effectors (muscles and glands)
What is the sense organs?
parts of our body that we use to feel the impact of different things are called SENSE ORGANS (eye, ear, mouth, skin, nose)
Each sense organ have special cells called……
Each sense organ have special cells called receptor cells
Describe receptor cells.
Receptor cells detect sensory input/stimuli
List receptors and senses and what they are sensitive too
Receptors in the eye are sensitive to light
Receptors in the ear are sensitive to sound
Receptors on the tongue are sensitive to chemicals
Receptors in the nose are sensitive to chemicals
Receptors in the skin are sensitive to, touch, pressure, pain and temperature
What is the largest part of the human brain?
The cerebrum is the largest part of the human brain
How many connecting hemispheres does the cerebrum have?
The cerebrum has two connecting cerebral hemispheres
What are the four main structures in the brain?
Cerebrum, Medulla, Spinal cord, cerebellum
What is the function of the medulla?
The medulla controls rate of breathing and heart rate
What is the function of the cerebellum?
The cerebellum controls balance and muscular co-ordination
What is the function of the cerebrum?
The cerebrum controls mental processes, conscious thought and intelligence
Draw and label the structure of a nerve cell.
What is the nervous system made up of?
The nervous system is made up of nerve cells called neurons
What is a neurons cell body attached too?
A neuron has a cell body attached too nerve fibres
What is a synapses?
A synapse is a tiny space that lies between the ending of one neuron and the beginning of the next neuron
- when an electrical impulse reaches the end of a neuron, chemicals are released from it
- The chemicals diffuse across the synapse and trigger an electrical impulse in the next neuron
