Question

Q18 )what is lymph and how is it formed
Q19 )write the difference between blood and
lymph in a tabular form
Q20 ) draw a well labelled diagram of neuron
Q21 )how does the transmission of nerve
mpulse occurs across the nervous tissue
Q22 )Why is transmission of nerve impulse
only undirectional?​

Answer 1

Answer:

lymph is formed when the interstitial fluid is connected through tiny capillaries,which are located throughout the body.

Explanation:

hope it helps you

Answer 2

Answer:

18 ans:-Lymph is formed when the interstitial fluid is collected through tiny lymph capillaries (see diagram), which are located throughout the body. ... Some fluid (blood plasma) leaks out into the tissues via tiny capillaries, contributing to interstitial fluid, which eventually drains back into the lymphatic system.

19 ans:-Differences between the Blood and the Lymph

BLOOD

1. It is red coloured fluid connective tissue that contains RBCs.

2. It is associated with circulation of Oxygen and Carbon dioxide.

3. It contains plasma, RBC's, WBC's, platelets and proteins.

LYMPH

1. It is colourless fluid connective tissue in which RBCs are absent.

2. It helps in body defence and is a part of immune system.

3. It contains plasma, less number of WBC's and platelets. It lacks proteins.

21 ans :-A nerve impulse is an electrical phenomenon that occurs because of a difference in electrical charge across the plasma membrane of a neuron. ... The action potential travels rapidly down the neuron's axon as an electric current. A nerve impulse is transmitted to another cell at either an electrical or a chemical synapse.

22 ans:-Neurotransmitters are molecules that fit like a lock and key into a specific receptor. ... Therefore, nerve impulses cannot travel in the opposite direction, because nerve cells only have neurotransmitter storage vesicles going one way, and receptors in one place.

20th answer is diagram it's in first only

Explanation:

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