Excretory System in Humans

Q.

What is malpighian body?

Q.

Why do we sweat more in summer?

Q. What are the excretory products released by kidney?

1. Urea
2. Uric acid
3. Creatinine
4. Carbondioxide

Q. Name the waste products excreted by lungs and skin

Q.

Ultrafiltration takes place in:

1. Ureters

2. Henle's loop

3. Glomerulus

4. Collecting duct

Q. Which of these is a component of the Malpighian capsule?

1. Bowman’s Capsule
2. Distal convoluted tubule
3. Proximal convoluted tubule
4. Henle’s loop

Q. Renal medulla contains conical masses called

1. Renal papillae
2. Renal pyramids
3. Renal cortex
4. Renal pelvis

Q. Study the diagram given alongside and the answer the questions that follow: [5 MARKS]
(a) Name the region in the kidney where the above structure is present.
(b) Name the parts labeled 1, 2, 3 and 4
(c) Name the stages involved in the formation of urine.
(d) What is the technical term given to the process occurring in 2 and 3? Briefly describe the process.

Q.

The __________ supplies impure blood to the kidney for filtration. (renal artery / renal vein).

Q. Ultrafiltration of the blood in the human body takes place in ________.

1. distal convoluted tubule
2. Bowman's capsule
3. proximal convoluted tubule
4. collecting tubule

Q.

The nephrons present in kidney has a double walled cup shaped structure known as

1. Bowman's capsule

2. Henle's Loop

3. glomerulus

4. proximal tubule

Q. Identify the incorrect statement with respect to the human kidney?

1. The concave part of kidney is called hilus
2. The peripheral region is called cortex and the central is called medulla
3. Malphigian capsule are present in the cortex region
4. Blood enters glomerulus through efferent arterioles

Q. Which of the following is incorrect about kidney?

1. It is the primary excretory organ in humans.
2. It helps in purifying the blood.
3. It is bean-shaped.
4. It produces urea.

Q.

Why is urea produced in the body?

Q. This question consists of two statements, Assertion and Reason. While answering this question you are required to choose any one of the following five responses.

Assertion: Ultra filtration takes place in presence of effective filtration pressure.

Reason: In ultra filtration process, blood is filtered in Bowman’s capsule, filtered fluid contains protein and blood corpuscles also.

Q. Explain the process of urine formation that takes place in the renal corpuscle.

Q. Given alongside is a highly simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow: [5 MARKS]
(a) Define excretion.
(b) Name the functional units of kidneys.
(c) Why does the cortex of the kidney show a dotted appearance?
(d) Mention two functions of the kidney.
(e) Write two differences in the composition of the blood flowing through the blood vessels, 'A' and 'B'.

Q. Which organ maintains water balance in the body?

1. Heart
2. Kidneys
3. Lungs
4. Liver

Q. Identify the functions of a nephron. Describe in detail what happens to fluids (blood, filtrate, and urine) as they pass through the parts of a nephron.

Q. There is an increase in blood urea when there is insufficient filtration in _________.

1. loop of Henle
2. distal tubule
3. Bowman’s capsule
4. collecting tubule

Q. The process of removing ammonia from nitrogen containing substances is known as .

1. excretion
2. deamination
3. respiration
4. digestion

Q.

Give the exact location of the following:

(i) Loop of Henle

(ii) Proximal convoluted tubule

Q. __________ are the excretory organs in annelids.

1. Ventral cord
2. Caeca
3. Haemocoelic
4. Nephridia

Q. _________ system includes organs which are involved in the formation, storage and elimination of urine.

1. Excretory
2. Digestive
3. Circulatory
4. Respiratory

Q. The diagram given below shows a section of a human kidney. Study the diagram carefully and answer the questions that follow.

(ii) Why does part B have a striped appearance?

Q. is the part of the nephron which collects the glomerular filtrate and passes it to the tubules.

1. Bowman's capsule
2. Renal artery
3. Renal vein

Q.

What will happen if the stretch receptors of the urinary bladder wall are totally removed?

Q. Choose the correct answers from the following given.
Which of the following structures is not related to osmoregulation or maintenance of water balance

1. Kidney
2. All of.the above are related to these processes
3. Gill
4. Contractile vacuo1e

Q. What are the excretory substances present in urine?

Q. What is the function of a nephron?