Question

Please tell me fastely​

Answer 1

Questions:

10) Give two main functions of stomata.

11) Name two sites in the body where cartilage is found.

12) What are the functions of:

1. Bones.
2. Cartilage.
3. Tendons.
4. Ligaments.

13) What is nervous tissue? Where is it

located? What are its functions? Throw light on process of nerve cell

14) Draw a neat diagram of nerve cell.

Answers:

10) (1) It's first function:

• Stomata have a important role they helps the plant to uptake Co2 (Carbon dioxide).

(2) It's second function:

• It helps the place to have a limited evaporation.

11) Two sites in the body where cartilage is found are Elbows and Nee.

12) Functions of the following:

• Bone: Bones helps our body by giving us support to stand and balance.

• Cartilage: This is the structure of bones the following this has a role in maintaining the bones flexibility.

• Tendons: This is also a part of the bone this has a role functional the force of the muscle.

• Ligaments: This is also a part of bone this also helps the bones to move and this has the structure of bone.

13) The group of nerves in our body this have the group of cells, this tissue has unit cell it's commonly known as nerve cell or also neurons. Its function to send information to one part to other. It is located in the brain, spinal cord in the body these are some of the important parts.

14) Refer the attachment for the nerve cell diagram.

Answer 2

❇ Your Answers:

1) Stomata are small microscopic pores on the surface of leaves( mostly on the lower surface ) They have kidney shaped guard cells which regulate opening and closing of stomata. The Guard cells secrets chlorophyll, so they can perform photosynthesis.

✏ Functions of Stomata:

• Loss of water or Transpiration takes place through stomata.
• It helps in exchange of gases.

2) Cartilage is a connective tissue which contains abundant numbers of collagen fibers. It is very strong and flexible but softer than bone. It mostly comprises the endoskeleton of vertebrates and skeletons of sharks, rays etc, cartilagenous fishes.

➙ It is found in Ear pinna, Tip of the nose, Trachea, larynx, and near the joints such as knees.

3) Here are the functions☄:

➙ Bone:

• Provides support for muscle attachment.
• Protects the internal organs.
• Forms the shape of the body.
• It is a reservoir of calcium and phosphorus.

➙ Cartilage:

• It gives flexible support.
• It helps in little movement like in ear pinna.

➙ Tendons:

• They attach muscles to bones.
• They provide great strength, but flexibility is limited.

➙ Ligaments:

• They connect one bone to another$.$
• They have elastin, they provides flexibility.

4) Nervous tissue consists of nerve cells or neurons, that are present in the brain, spinal cord and nerves. They help in the conduction of impulses from effector organs to the brain. They can be long upto 1 m, making them the longest cell present in human body.

➙ Location: They are found all over the body. The longest nerve cells are found in the limbs (arms and legs). They conduct stimuli to brain or spinal cord.

➙ Functions: They help in the conduction of impulses from effector organs to the brain.

➙ Process of impulse conduction:

• First of all, the impulses are carried from one end of neuron to the other end.
• Stimulus ➙ Dendrites ➙ Cell body/cyton ➙ Axon ➙ Axon terminal ➙ Stimulus is passed to consecutive cell.
• The axon of one neuron and dendrites of other are not in contact directly, but they have small space known as Synapse.
• At the end of neuron, the impulse is passed on to the next neuron via a neurotransmitter like acetylcholine or dopamine.
• The neurotransmitters cross the gap and excite activity of second neuron which then receives the impulses along on it's own axon.

14) In the attachment ✏

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