Redraw the diagram. Name and label the parts indicated, below, Carries impulses away from the cell body

The neuron can be characterised as the structural and functional unit of the nervous system. It is composed of dendrons, soma, axon hillock, axon, and synaptic knobs. Axon can be characterised as the elongated fibre of the neuron that extends from the soma to the terminal endings and transmits the neural signal. This structure carries the impulses away from the cell body.

Excretion is a natural process that helps animals, humans and other organisms to expel out the waste products (urea and uric acid) from the body. This waste product is generated inside the body during metabolism. Cells need energy and nutrients to survive. To get the required energy, they perform certain biochemical reactions. These reactions take place and some byproducts are also produced. This byproduct can be very toxic or lethal to the cells if allowed to accumulate inside the body. This waste product is get rid of by the process of excretion. The main excretory organ in humans are as follows: Skin: Remove excess salt in the form of sweat from the body. Lungs: Remove carbon dioxide that is generated during respiration. Kidney: Remove nitrogenous waste from the body.

Observe the picture and answer the following question Name the part indicated as (i).

In the given diagram the axon is represented by (i). The neuron can be characterised as the structural and functional unit of the nervous system. It is composed of dendrons, soma, axon hillock, axon, and synaptic knobs. Axon can be characterised as the elongated fibre of the neuron that extends from the soma to the terminal endings and transmits the neural signal.

EASY

Earn 100

Liver act as an excretory organ. Justify the statement.

Important Questions on Excretion in Organisms

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Redraw the diagram. Name and label the parts indicated, below,

Question Image

Carries impulses away from the cell body

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

What is excretion? Name any two nitrogenous wastes products.

MEDIUM

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Explain the structure of cartilage tissue.

MEDIUM

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Write two differences between axon and dendron.

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Define excretion.

MEDIUM

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Write one function of parenchyma tissue.

MEDIUM

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Explain the Haversian system of bone tissue.

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Sclerenchyma in plants is an example of simple permanent tissue that is comprised of two types of cells, sclereids and fibres. Why these cells are functionally important to the plants even after they die? Choose the correct alternative from the options given below.

MEDIUM

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Give appropriate biological or technical terms for the following:

The relaxation phase of the heart.

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

What is excretion? Name two excretory organs in humans.

MEDIUM

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

What is excretion? Explain
(i) excretion in Amoeba.
(ii) excretion in Earthworm.

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Correct the following statements by changing the underlined words:

The normal pale yellow colour of the urine is due to the presence of the pigment Melanin.

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Observe the picture and answer the following question

Question Image

Name the part indicated as (i).

MEDIUM

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Give an example of an entomophilous flower.

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Parenchyma, collenchyma and sclerenchyma are kinds of simple permanent tissues in plants. Which of the following statement is true for collenchyma?
A. Made up of dead cells
B. Have very little intercellular space
C. Cells are irregularly thickened at the corners
D. Cell wall contains lignin

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

T-lymphocytes originate from

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Observe the given diagram and read the following statements.

Question Image

(i) These are cells of collenchyma tissue.

(ii) At maturity these cells lose their nucleus and cytoplasm.

(iii) The cells are living and thick at their corners.

(iv) This tissue gives flexibility to plant parts.

Correct statements are:

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Name the structures that help in excretion in tapeworm, earthworm, cockroach and human beings.

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Choose the incorrect statements among the following.
A) The female sex organs of Angiosperms are called strobilus.
B) The fusion of motile male gamete with non-motile egg is called zooidogamy.
C) Some algae are in association with animals.
D) Archegonium is flank shaped male sex organ with single cell.

EASY

Science>Biology>Excretion in Organisms>Excretory System of Human Beings

Identify the ODD term in each set and name the CATEGORY to which the remaining three belong:

Liver act as an excretory organ. Justify the statement.

Important Questions on Excretion in Organisms

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