2.2 Control And Communication Flashcards
What does the nervous system consist of?
Central nervous system (CNS) and peripheral nervous system (PNS).
Which two organs make up the central nervous system?
Brain and spinal cord.
What are the 3 parts of the brain?
Cerebrum, cerebellum, and medulla.
What is the function of the cerebrum and where is it located?
The cerebrum is involved in conscious thought and decision-making processes, as well as controlling your personality, emotions, sight, and speech. It is the largest part of the brain which is split into two cerebral hemispheres.
What is the function of the cerebellum and where is it located?
The cerebellum controls subconscious activities associated with the fine motor control of muscles (coordination) and balance. It is located at the back of the brain.
What is the function of the medulla and where is it located?
The medulla controls most of the basic bodily functions that we need to stay alive.
The function of the medulla include:
- Heart rate
- Breathing rate
- Digestion
It is located near the middle of the brain and is well protected.
What 3 types of neurons are there?
Sensory, Inter, and motor neurons. (SIM)
What is the function of the sensory neuron?
Sensory neurons pass the information from the receptors to the CNS.
What is the function of the Inter neuron?
Inter neurons operate within the CNS which processes information from the senses that require a response.
What is the function of the motor neuron?
Motor neurons enable a response to occur at an effector (muscle or gland).
How are nerve impulses carried out?
Electrical impulses carry out messages along neurons. Chemical transfer these messages between neurons, at synapses.
Why do nerve impulses need to be fast?
To protect the body from harm
What are two features of a reflex action?
Reflex actions are rapid and autonomic (involuntary) responses to stimuli.
How do endocrine glands send hormones throughout the body?
Through the bloodstream.
What type of messengers are hormones?
Chemical messengers.
