3 rd Term Worksheet [ ] Subject Biology Class VII Name : Sec. :

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1 1 bio (vii) 3 rd Term Worksheet [ ] Subject Biology Class VII Name : Sec. : Check Point: Chapter 6 [The Nervous System] [A] Fill in the blanks: [97] 1. Our brain is divided into main parts. 2. is located at the top of the brainstem. 3. The controls the movements of our muscles. 4. controls involuntary actions such as breathing and heart beat. [B] Answer the following questions: [99] 1. Write down the main functions of the following part of a neuron: a. Cyton : b. Dendron : c. Axon : 2. Fill in the blanks: a. The main part of a neuron is. b. Places where one neuron communicates with another neuron are called. c. is a quick automatic response to certain kind of stimuli. It does not involve and is controlled by. Keywords: [99] Axon : Dendron: Motor nerves: Neuron: Reflex: Synapse: Sensory nerves:

2 bio (vii) Exercise: [100-103] [A] Multiple Choice Questions: [100] (i) (ii) (iii) (iv) (v) Which of these is the largest part of the human brain?

2 2 bio (vii) Exercise: [ ] [A] Multiple Choice Questions: [100] (i) (ii) (iii) (iv) (v) Which of these is the largest part of the human brain? (a) Cerebrum (b) Cerebellum (c) Medulla oblongata (d) Spinal cord Which of the following nerves carry information to the brain? (a) Motor nerves (b) Sensory nerves (c) Mixed nerves (d) All types of nerves In the human brain, thinking is done by the (a) Cerebrum (b) Cerebellum (c) Medulla oblongata (d) Spinal cord If your hand accidentally touches a hot glass, the command to remove the hand from the glass is given by: (a) Cerebrum (b) Cerebellum (c) Medulla oblongata (d) Spinal cord There are pair of cranial nerves in our body. (a) 10 (b) 11 (c) 12 (d) 13 [B] Fill in the blanks: [100] 1. The cells make up the nervous system. 2. Actions that are automatic and do not need thinking are actions. 3. The in the brain controls involuntary actions such as beating of the heart. 4. The is protected by the spine and the by the skull. 5. The ability of the brain to store information and recall it when required is called. [C] Write T for true and F for false statements: [100] 1. The nervous system controls the activities of all the organ systems present in our body. 2. There are 12 pairs of spinal nerves in our body. 3. Sensory nerves send signals (order) from the brain or spinal cord to the muscles. 4. The nervous system consists of the brain, spinal cord and nerves. 5. Medulla oblongata keeps working even when we sleep. [D] Look at the given image and answer the questions that follows: [101] A. a. Label the different parts of the brain. b. Which is the largest part of the brain?

3 3 bio (vii) c. What are the functions of cerebrum? d. What is the main function of cerebellum? 2. a. Name the organ being studied. b. Label the parts 1, 2 and 3. c. State functions of each. d. State the significance of the organ.

4 3. 4 bio (vii) a. Define neuron. b. Label the dendrite, nucleus, cyton, axon in it. c. State its function. d. How does neuron transmit impulse? [E] Very short answer type questions: [102] 1. Give one word for the following: a. Control centre of the whole body. b. Largest part of the brain. c. Part of the brain that controls movements of muscles. d. Part of the brain that controls involuntary actions such as breathing and heartbeat.

5 5 bio (vii) 2. Define the following terms: [102] a. Short fibres in the neuron that arise from the cell body. b. A sheath surrounding the axon. c. Place where one neuron communicates with other neuron. [F] Short answer type questions: [102] 1. Name the different parts of the brain. 2. What is the location of: Ans- a. Cerebrum b. Cerebellum c. Medulla oblongata 3. What are the main parts of a neuron? Ans-

6 6 bio (vii) [H] Long answer type questions: [103] 1. What is the importance of nervous system? Ans- 2. Write a short note on brain. Ans- 3. Mention the functions of the following parts of brain: Ans- a. Cerebellum b. Medulla Oblongata c. Cerebrum

7 7 bio (vii) 4. Differentiate between: a. Sensory nerves and motor nerves: b. Cranial nerves and spinal nerves : 5. Write a short note on reflex actions. [100]

8 Check Point: 8 bio (vii) Chapter 7 [Allergy] [A] Fill in the blanks: [107] 1. The antigens that produce allergic reactions in the bodies with whom they interact are called. 2. Allergen can enter in the body through three main pathways namely, and. 3. Allergies that occur in a particular season are called allergies. 4. Allergies due to dust are examples of allergy. Keywords: [111] Allergens: Histamine: Perennial allergies: Seasonal allergies: Exercise: [ ] [A] Multiple Choice Questions: [ ] (i) Whom should we consult to know about allergy? (a) Allergens (b) Allergist (c) Physician (d) None of them (ii) Which kind of allergy is caused due to Aspergillus? (a) Dust mite (b) Dust (c) Pollen (d) Food (iii) When do seasonal allergies occur? (a) Throughout the year (b) Every season (c) Some specific seasons (d) None of these (iv) Which symptom occurs commonly due to pollen allergy? (a) Wheezing (b) Stomachache (c) Skin rashes (d) Nausea (v) When do perennial allergies occur? (a) Summer (b) Throughout the year (c) Spring (d) Winter [B] Fill in the blanks: [112] 1. The that produces allergic reactions are called allergy. 2. The weak system makes body prone to allergies. 3. As a response to allergens, the body produces a chemical called. 4. We must consult an to know about allergies and their preventive measures. 5. allergy occurs mainly in spring season. 6. Eating a builds our immune system.

9 9 bio (vii) [C] Write True or False for the following sentences: [112] 1. Mouth, nose and skin are the different routes through which the allergens can enter in out body. 2. Moulds grow in spring season at humid places. 3. Dust mites are the organisms that are too small to be seen through naked eyes. 4. Never check labels of the packaged food items to know its ingredients and avoid any side effect. 5. Visit an orthopaedician to know about your allergy, their triggers, preventive measures and medication. [D] Very short type questions: [112] 1. What is allergy? 2. What causes allergy in human beings? 3. What is hay fever? 4. Who shows allergic reactions or symptoms when they get exposed to allergens? 5. Why should we cover our bodies while going out in the sun?

10 10 bio (vii) [E] Short answer type questions: [112] 1. List the main allergens and symptoms of skin allergies. 2. What is the difference between allergen and histamine? 3. How can one prevent himself from allergies? 4. Pollen allergy is which type of allergy? Explain.

11 bio (vii) [F] Observe the given picture and answer the following questions: [112] 1. What does the given picture show? Name it. 2. How does it affect human beings?

11 11 bio (vii) [F] Observe the given picture and answer the following questions: [112] 1. What does the given picture show? Name it. 2. How does it affect human beings? [G] Long answer type questions: [113] 1. Differentiate between seasonal and perennial allergy? Give examples to support your answer. 2. What is photosensitivity? How does it occur? Describe its symptoms and care?

12 12 bio (vii) 3. Describe the causes, symptoms and preventions of the following allergies: a. Pollen allergy : b. Dust mite: c. Dust: d. Food items:

Name Class Date. Read the words in the box. Read the sentences. Fill in each blank with the word or phrase that best completes the sentence.

Name Class Date. Read the words in the box. Read the sentences. Fill in each blank with the word or phrase that best completes the sentence. Skills Worksheet Directed Reading B Section: The Nervous System TWO SYSTEMS WITHIN A SYSTEM 1. What does the nervous system do? a. pump blood b. gather and interpret information c. digest food d. eliminate