Control and coordination, short notes, Summaries of Biology

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In

response

to environmental

changes, the organism shows various movements. ↓

• Dnot^ lead^ to^ growth lead May to growth e. g.. children running e. g., plants (^) showing phototropism · All events of (^) our body are^ under^ neural^ and^ hormonal^ (endocrine) Control.

All

organs of (^) our body complement^ coordinate (^) with each other for effective^ function ANIMALS (^) :ERVOUS^ -SYSTEM · our (^) nervous tissue has network of (^) specialised cells (^) called -nervouscells/neurons ↓ conduct electrical^ impulse fromOne^ part to^ next (^) part Gustatory receptor detects^ taste^ and^ ofactory receptor detects^ Smells. Flowof^ information : Informationrecevied^ by tip of^ dendrite ↓ Impulse sent toCuton/cellbody Impulse -send to (^) axon and then to (^) neveendings ·

HUMAN BRAN · Main^ Coordinating Centre o (^) - CNS^ =^ Brain^ +^ Spinal Cord

(cranium) (vertebral^ Column)

· (^) INS = (^) Cranial + Spinal nerves Receptors :^ alls, tissue or organs that receive (^) the stimulus.

Photo

recep tors Eyes^ Light Themmo (^) Heal olfactory receptors Nose (^) smell receptors 4 Skin (^) cold Gustatory receptors (^) Tongue Taste Phono (^) receptors Ear^ sound^ Nociceptors^ Pais

BRAIN

· Main^ thinking ↑ part ; · Hearing,

smell ,

Sight FOREBRAIN (^) Mid- (^) HIND BRAIN · ↓^ BRAIN^ ·^ Pons-Ponsalance Vol. (^) movem ·Cerebrum (^) ↓ · Cerebellum- · (^) Thalamus Inv. movement (^) · (^) Medulla · Hypothalamus along^ with Hindbrain (^) BP, salivation , vomiting

COORDINATIONINPLANTS ·Plants (^) donot have any neural^ and^ muscular^ system · Plant^ cells Changes their (^) shape (^) by changing amount of^ H20 in^ them . they swell^ or^ shrink eg,^ folding of (^) leaves in (^) Minosa i.e, Chhuimui (^) plant

• (^) - MOVEMENT DUE^ TO^ GROWTH

• > Positively phototrophic
• > Negatively geotrophic · · chemotrophism : movement towards (^) chemicals e. g.,^ pollen tube. BLANTSORMONES · (^) Simple chemicals (^) that move from their (^) site ofsynthesis totheir site of action and regulates some (^) physiological process. (^1) Ain : sythesised (^) by (^) growing shoot^ tips · Plants appears to^ bend towards light

; auxin diffuses to the

shady sideI help^ cells^ grow on^ that^ side.

Growth

and menstrual Cycle