Control and Communication Flashcards
(28 cards)
what is the nervous system made up off
CNS and other nerves
what are the 3 types of neurons
sensory neurons
inter neurons
motor neurons
what is the central nervous system made up off
the brain and spinal cord
what is the point of the CNS
to process sensory information.
to coordinate the body’s response.
What are the two responses to a stimulus?
A response can be a rapid action from a muscle, or a slower response from a gland by the release of a chemical.
What is the function of the cerebrum?
The cerebrum controls conscious thought and actions, memories, and personality.
What is the function of the medulla?
The medulla controls heart rate and breathing rate
What is the function of the cerebellum?
The cerebellum controls balance and movement.
State the function of a Sensory neuron.
Sends information from the senses to the CNS.
State the function of a Inter neuron.
in the CNS and processes information from the senses that require a response
State the function of a Motor neuron.
A motor neuron enables a response to occur at an effector (a muscle or gland).
What do sensory neurons contain to detect stimuli?
RECEPTORS
How are messages transmitted by neurons?
Sensory neurons contain receptors which detect stimuli and send an electrical impulse to the inter neuron and then a motor neuron to bring about a response
What is a synapse?
Neurons are connected by tiny gaps called synapses.
How are messages transmitted across a synapse?
Chemicals diffuse across the gap to carry the message from one neuron to another.
Where would the reflex arc take place?
spinal cord
describe the event 1-6 of the reflex arc
1.pressure or pain stimuli
2.receptors in the skin
3.sensory neuron
4.inter neuron
5.motor
6.effector(muscle or gland)
State the definition of a target tissue
The target tissue contains special receptor proteins that will recognise the hormone.
What is it that target tissues contain that non-target tissues do not?
The receptor proteins ensure only the target tissues are affected by the hormone
Describe the function of an endocrine gland.
Endocrine glands release hormones into the bloodstream.
What are the three main endocrine glands in the human body?
The pancreas
The ovaries (females)
The testes (males)
What hormone is released in response to an increase in blood glucose?
insulin is produced.
What organ produces insulin?
the pancreas
What is the target organ for insulin?
the liver
