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Anatomical Basis of the reflex arc
3. Sensory Neuron.
4. Dorsal root ganglian.
5. White Matter.
6. Grey Matter.
7. Association Neuruon.
9. Ventral Root.
10. Motor Neuron.
1. Make the body to react to a stimulus.
2. Detect the stimulus and set up impulse.
3. Carry impulse to the spinal cord.
7. Start off another impulse in an appropriate motor neuron.
9. Carry information to control motor function.
10. Carry impulse to the effector.
1. Control reflexs.
2. It allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain.
Specimen E – Rat
Phylum – Chordata.
Class – Mamalia.
Order – Rodentia.
Family – Miridae.
Genus – Rattus Rattus.
(i) They Transmit Disease (lassa fever).
(ii). Play predatory roles.
(iii) Serve as food to some.
(iv) They consume and damage human food.
(v)They destroy articles like wires which can lead to fire if exposed and breeded.
= Small Intestine: receive food and absorb the nutrient into the body.
= Stomach: breaks down food into chyme.
= Large Intestine: Final break down of food takes place.
= Rectum: hold faeces temporarily before they are expelled.
= Oesophagus: it helps in transportation of food down to the stomach.
(i) Helps to keep their balance.
(ii) Stick to things and help rats cross narrow parts or climb around
Check the diagram below
(3ii) It is given as – % ⚥ K(5) C1+2+(2) A(9)+1 G1.
floral formula is conventional method for recording the structure of a flower. It uses a series of capital letters to identify parts: K = calyx; C = corolla; A = androecium; G = gynoecium. The number of components in each is indicated by a number; if the number exceeds 12, the symbol ∝ (infinity) is used.
(3bii) check they pictures already drawn and labelled
-The horizontal underground plant stem capable of producing the shoot and root systems of a new plant.
-They are used to store starches and proteins and enable plants to perennate (survive an annual unfavourable season) underground.
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