Page 64 - EM BIOLOGY NOTES 10TH CLASS PSR DIGITAL BOOKS

DRAWING DIAGRAMS - PARTS - PROCEDURE

REFLEX ARC Reflex actions - reflex arc

1. Reflex actions are fast, immediate automatic and
involountary responses of the body.
2. Spinal cord plays a major role in reflex action, Brain doesn’t
involved in the execution several reflexes.
3. Ex : 1. When we touch a hot object immediately with draw our hand on it.
2. We close our eyes when bright light is focused on our eyes.
4. The structural and functional unit that carries out reflex action is called a reflex arc.
1. Receptor :- Receives infromation and generates impulses.
2. Sensory Nerve :- Carries information from the receptor to the
association neuron in the spinal cord.
3. Association Nerve :- Analyse the information and generates responses.
4. Motor Nerve :- Carries information from the spinal cord to the effector organ.
5. Effector organ :- Receives the information and shows the appropriate
responses.
ENDOCRINE SYSTEM Endocrine system

1. Endocrine system consists Endocrine glands.
How to draw
2. These glands secrete hormones directly into the blood. pl. scan QR
Blood carries the hormones into where it is necessary.
3. These glands do not have ducts. So these are called as ductless glands.
4. There are 6 endocrine glands in our body. They are :
1. Pituitary gland - Somatotrophin
Thyrotrophin
Gonado trophin
2. Thyroid - Thyroxin
3. Parathyroid - Para tharmone
4. Pancreas - Insulin, Glucagon
5. Adrenal - Adrenalin
6. Testis - Testosterone
RAJU’S NATURAL SCIENCE ACADEMY 7. Ovary - Estrogen, Progesteron
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