Tag: role of other organs in excretion

Questions Related to role of other organs in excretion

Match the columns

A) Hypothalamus 1) intersensory associations
B) Limbic lobe 2) expression of emotional reactions
C) Medulla  3) urge of eating and drinking 
D) Association areas 4) gastric secretion reflex
biology excretion to maintain homeostasis excretion in other organisms other excretory organ role of other organs in excretion

  1. $A-2,B-3,C-4,D-1$

  2. $A-3,B-2,C-4,D-1$

  3. $A-3,B-1,C-4,D-2$

  4. $A-2,B-1,C-4,D-3$

Show answer
Correct Option: A
Explanation:

The limbic system is basic to motivation, emotion, and reward processes. It controls emotional expression through the hypothalamus, which has control over the body's emotional responses systems. The thalamus in the limbic system (' leopard brain') signals the brain thus we get to feel satisfaction for each mouthful of food. The acid and semi-digested fats in the duodenum trigger the enterogastricreflex – the duodenum sends inhibitory signals to the stomach by way of the enteric nervous system, and sends signals to the medulla that inhibit the vagal nuclei, thus reducing vagal stimulation of the stomach. Association cortex is the cerebral cortex outside the primary areas. It is essential for mental functions that are more complex than detecting basic dimensions of sensory stimulation, for which primary sensory areas appear to be necessary. So the correct option is 'A−2,B−3,C−4,D−1'.

Which of the following statements is correct about excretion in earthworm?
(i) Earthworm is mainly ureotelic
(ii) Septal nephridia, present on both sides of intersegmental septa of segment 15 to the last, open into intestine,
(iii) Integumentary nephridia, attached to lining of body wall of segment 3 to the last, open on the body surface.
(iv) Different types of nephridia are basically similar in structure.
(v) Nephridia regulate the volume and composition of body fluids 
biology excretion to maintain homeostasis excretion in other organisms other excretory organ role of other organs in excretion

  1. (i) and (iv)

  2. (iv) and (v)

  3. (i), (ii), (iii)

  4. All of these

Show answer
Correct Option: D
Explanation:

Following are the correct statements about the excretion of earthworm: 

(i) Earthworm is mainly ureotelic.
(ii) Septal nephritis, present on both the sides of intersegmental septa of segment 15 to the last, that open into the intestine.
(iii) Integumentary nephritis, attached to the lining of the body wall of segment 3 to the last, open on the body surface.

(iv) Different types of nephridia are basically similar in structure.
(v) Nephridia regulate the volume and composition of the body fluids.

So, the correct answer is 'All of these'.

Fill up the blank spaces in the table below by selecting the correct option.

Phylum/Class Excretoryorgan Circulatorysystem Respiratoryorgan
Arthropoda A B Lungs/Gills/Tracheal system
C Nephridia Closed Skin
D Metanephridia Open E
biology excretion to maintain homeostasis excretion in other organisms other excretory organ role of other organs in excretion

  1. A-Green gland, B-Closed, C-Mollusca, D-Annelida, E-Tracheal system

  2. A-Malpighian tubule, B-Open, C-Annelida, D-Mollusca, E-Feather-like gills

  3. A-Antennary gland, B-Open, C-Porifera, D-Amphibia, E-Lungs

  4. A-Nephridia , B-Closed, C-Mollusca, D-Annelida, E-Lungs

Show answer
Correct Option: B
Explanation:

A - Malpighian tubule

B - Open
C - Annelida
D - Mollusca
E - Feather- like gills
So, the correct answer is (b).