Homeostasis

Q. Define the term ‘health’?

Q.

Which layer of the cranial meninges is in contact with the brain tissue?

Q. maintains a stable internal environment in an organism.

1. Homeostasis
2. Reproduction
3. Digestion
4. Epistasis

Q.

Ethyl alcohol is produced during aerobic respiration.

1. True
2. False

Q.

Which of these systems in the human body is responsible for control and coordination of different body functions?

1. Skeletal System

2. Blood vascular System

3. Neural System

4. Urinary System

Q. Define human behaviour and how it is stands different from Animal behaviour?

Q. Define the term ‘health’?

Q.

The method of prevention of water pollution from an industrial perspective is:

1. Adding $C{O}_2$ in the water.

2. Treating polluted water in the factory before dumping.

3. Adding $S{O}_2$ in the water.

4. Adding chemicals to water to make it transparent.

Q.

Reserve carbohydrate- glycogen is stored in our body in

1. Kidney

2. Stomach

3. Intestine

4. Liver

Q.

State whether the following are True or False:

Amniotic fluid acts as a shock absorber.

1. True
2. False

Q.

Draw and label a diagram of the human respiratory organs.

Q.

Choose the correct option(s) in the context of nutrient exchange and waste elimination in multicellular organisms.

1. Exchange of life-supporting nutrients and waste elimination takes place with the external environment directly.

2. Exchange of life-supporting nutrients and waste elimination takes place with the external environment through the extracellular fluid.

3. The extracellular fluid exists outside of the muscle cells and serves as the medium for vital exchanges with the external environment.

4. The plasma is the component of the extracellular fluid that surrounds muscle cells.

Q.

___________ number of ATP molecules are formed as a result of anaerobic respiration.

Q. Look at following matches:
1. Spinal Cord - Reflex action
2. Cerebrum - Thinking, Decision making
3. Corpus Callosum - Controls heart beat
4. Medulla oblongata - Controls cardiac center

Which of the given matches are correct?

1. 2 and 3 only
2. 1, 2 and 3 only
3. 1, 2 and 4 only
4. 4 only

Q. Excretion maintains a stable internal environment in an organism.

1. True
2. False

Q.

Which of the following statements constitute survival mechanisms in different organisms?

1. Some bacteria alter their composition and enter a state of hibernation.

2. Yeasts form spores which are highly sensitive to external conditions.

3. Adrenaline is secreted by the adrenal gland in human beings.

4. The digestive and endocrine systems of human beings do not have a role to play in survival mechanisms.

Q.

Which of the following is/are the characteristic(s) of living organisms?

1. Growth

2. Survival

3. Reproduction

4. Homeostasis

Q.

$\begin{array}{ccc}Substance& AmountInitiallyfilteredoutofbloodstream& Amountreturnedtobloodstream\\ Water& 100L& 99L\\ Glucose& 370g& 364g\\ Urea& 30g& 10g\end{array}$

Calculate the percentage of each substance absorbed into the blood.

Percent absorbed by blood = $\frac{Amountreturnedtobloodstream\times 100}{Amountinitiallyfilteredout}$

1. Water = 99.9%, Glucose = 98.3%, Urea = 33.3%

2. Water = 99.9%, Glucose = 98.8%, Urea = 33.3%

3. Water = 97.9%, Glucose = 98.8%, Urea = 33.7%

4. Water = 69.9%, Glucose = 58.8%, Urea = 33.3%

Q.

What is the function of pons which is present in the brain ?

Q.

$\begin{array}{ccc}Substance& AmountInitiallyfilteredoutofbloodstream& Amountreturnedtobloodstream\\ Water& 100L& 99L\\ Glucose& 370g& 364g\\ Urea& 30g& 10g\end{array}$

Calculate the amount of each substance left in the urine.

1. Water = 1L, Glucose = 6g, Urea = 2g

2. Water = 2L, Glucose = 6g, Urea = 50g

3. Water = 1L, Glucose = 6g, Urea = 20g

4. Water = 11L, Glucose = 60g, Urea = 2g

Q. The pharynx opens into the larynx by a slit-like aperture called ________ .

1. Epiglottis
2. Trachea
3. Glottis
4. Bronchus

Q. Explain any two interaction between the different organ

Q.

The testis is located within the

1. Pennis

2. Scrotum

3. Ureter

4. Urinary bladder

Q.

The category of drugs causes the kidneys to produce more urine?

Q. We should drink around ___ of water daily.

1. 0.5-1 litre
2. 9-10 litres
3. 7-8 litres
4. 2-3 litres

Q.

Which one of the following is not true about the human respiratory system?

1. It maintains acid balance.

2. It maintains Oxygen and Carbon-dioxide balance

3. It meets the higher oxygen demands.

4. There is a direct contact between body cells and the surrounding air.

Q.

Which of the following are the characteristics of living organisms?

1. Growth

2. Survival

3. Reproduction

4. Homeostasis

Q.

Which of these are removed from the body through the skin?

1. Water

2. Salts

3. Urea

4. Carbon dioxide

Q. One haemoglobin carries how many molecules of $O_2$?

1. 2
2. 4
3. 6
4. 8