Nervous System

Q.

Why is energy needed for life processes

Q. What are the various maintenance processes in living organism? Define each of the following with examples.

Q. How nerve impulses are transferred from one neuron to next neuron?

[Review question: Pg. No: 228]

Q.

Give two examples of reflex actions in your daily life.

Q.

What is the process of homeostasis?

Q. why do sleep?

Q. What is Homeostasis ?

Q.

What is reflex action?

Q.

Define homeostasis

Q.

Homeostasis

Q. What are the functions of cerebrospinal fluid?
[2 Marks]

Q. What are the functions of the left brain? [2 MARKS]

Q. (ii) What is meant by 'positive geotropism' and 'negative geotropism? Give one example of each type. Draw a labelled diagram to illustrate your answer indicating the plant part which shows positive geotropism and the plant part which shows negative geotropism.​

Q. Choose the correct answers from the alternatives given .
Which of the following does not represent homeostasis?

1. Sensors detect levels in the blood and trigger an increase decrease in the rate of breathing
2. When body temperature drops, you shiver to generate heat; when your body heats up, you sweat and the evaporation cools you
3. Energy is captured by plants, then transferred to consumers and decomposers, and eventually lost as heat
4. None of the above

Q. What are the functions of right brain? [2 MARKS]

Q. The brain controls all responses of the body to the external environment.

1. True
2. False

Q. _______ is a part of the hindbrain.

1. Cerebellum
2. Hypothalamus
3. Spinal cord
4. Corpus callosum

Q. Neurons are classified on the basis of

1. Number of nucleus present
2. Number of processes arising from the cell body
3. Number of dendrites present
4. Number of axons present

Q.

What term do you give to movement in response to gravity?

Q. Choose the correct answers from the alternatives given .
Homeostatic control in living things is exerted over all of the following except

1. temperature
2. moisture level
3. response to stimuli
4. acidity level

Q. State whether the following statements are true or false .
Each organism has some degree of homeostasis, i.e. it is able to make adjustments so that its internal environment remains relatively constant despite changes in the external environment

1. True
2. False

Q. Define hydrotropism. Give one example of hydrotropism. Also, state whether this example is of positive hydrotropism or negative hydrotropism.
[1 Mark]

Q.

Name process/term for the following statements:

The disease caused by over secretion of TSH in children.

Q.

Statement 1: Exhaled air contains a higher concentration of carbon dioxide than inhaled air. ​

Statement 2: When air is blown from the mouth into a test tube containing limewater, the limewater turns milky.

1. Both the statements are incorrect
2. Statement 1 is correct but statement 2 is incorrect
3. Both the statements are correct
4. Statement 2 is correct but statement 1 is incorrect

Q. How do organisms maintain homeostasis ?

1. conform
2. Regulate
3. Migrate and
4. suspend

Q. Strengthening of concept of environmental monitoring is important for concern of the

1. Quality of environment
2. Quantity of environment
3. Pure air
4. Quality of monitor

Q. Identify the correct option from the following.

1. (i) +ve, (ii) -ve
2. (i) -ve, (ii) +ve
3. (i) -ve, (ii) -ve
4. (i) +ve, (ii) +ve

Q. Select the correct option which depicts the correct sequence of a reflex arc.

1. Effector $\to$ Sensory neuron $\to$ Brain $\to$ Relay neuron $\to$ Receptor
2. Receptors $\to$ Sensory neuron $\to$ Spinal cord $\to$ Motor neuron $\to$ Effector
3. Receptor $\to$ Relay neuron $\to$ Motor neuron $\to$ Spinal cord $\to$ Effector
4. Sensory neuron $\to$ Relay neuron $\to$ Motor neuron $\to$ Spinal cord $\to$ Receptor $\to$Effector

Q.

Part of the brain consisting of the cardiac centre, respiratory centre, and vomiting centre is __________.

1. Cerebrum

2. Spinal cord

3. Cerebellum

4. Medulla oblongata

Q. Short / Long answer type questions .
By suitable examples explain the terms steady state and homeostasis