Life Science's

What is the Anatomical position

Standing upright and facing forwards, arms by the sides, palms facing forwards, and feet flat with toes pointing forwards

Anterior meaning

Front of the body (pubic bone)

Posterior meaning

Back of the body (coccyx)

Superior meaning

Above, higher than in the body (heart is superior to stomach)

Inferior meaning

Below, lower in the body (stomach is inferior to heart)

Proximal meaning

Closer to where a limb attaches to centre of body (elbow is proximal to wrist)

Distal meaning

Further from where a limb attaches to centre of body (fingers are distal to wrist)

Homeostasis

regulation of pH, temperature, oxygen, blood glucose .

Regulation of conditions inside the body to maintain a stable internal environment in response to both internal and external conditions

Automatic control systems: receptors detect a change, coordination centres interpret the change and makes decision (brain, spinal cord), effectors carry out the change such as muscle that contract or glands that release hormones. Nervous system sends electrical impulse to brain?, endocrine system releases hormones only affecting cells with correct receptors.

Negative feedback- maintains homeostasis through hormone levels

Identification of imbalance is recognised by receptors which sends electrical impulses to control centre which decides a response to change in order to achieve stable body temperature creating homeostasis and equilibrium CONTINUE THE VIDEO

Positive feedback

Negative