The Nervous and Endocrine System
By Shuwen Maxwell, Ben Chiappa and Morgan Blake
Sensory and Motor Neurones
Sensory neurons are thought to be responsible for converting external stimuli into internal stimuli. They are activated by sensory input such as sight, hearing and touch. They transfer projections into the nervous system which gives information.
Motor neuron is the name given to neurons that live in the central nervous system. They project their axons outside the CNS and directly or indirectly control muscles. Both motor and sensory neurons travel through the brainstem.
Nose - Senses smells by the olfactory receptors
Eyes - Detects light, which can vary in brightness and colour
Skin - The nervous system detects pressure, which sends a message to the brain
Ears - Detects the vibration of movement in the air, which is heard as sound
Mouth - Senses taste, texture, temperature and capsaicin (the active ingredient in chilli peppers)
How the Nervous System Works
Six Glands of the Endocrine System
Pituitary: Found at the base of the forebrain. It regulates the growth of bones and tissue. Produces growth hormone.
Thyroid: In the lower larynx. Regulates rate of growth and metabolism. Produces anti-diuretic hormone.
Adrenal: Above the kidney, it assists in converting proteins to sugar. Produces cortisone hormone.
Pancreas: It’s a double gland which regulates sugar metabolism. Too little insulin leads to high sugar level in blood. Produces insulin.
Ovary: Found in the walls of the pelvis. It assists of the development of sexual characters. Produces estrogen.
Testis: Below the scrotum. Produces sperm and testosterone.
How the Encocrine System Works
The endocrine system is the system that is in total control of the changes in our body that take place over a long period in time. Things such as growth and development, tissue functions, metabolism, sexual functions and reproductive processes are all influenced by the endocrine system.