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Control and Coordination | NCERT Solutions | Class 10

In-text questions set 1 Page Number 119 1. What is the difference between a reflex action and walking? Ans. Difference between reflex action and walking: 2. What happens at the synapse between two neurons? Ans. At synapse, the electrical impulse generated a dendrite of a neuron is passed on to dendrite of Read more…

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Sense Organs in Animals | Class X

Animals have a number of specialized structures called sense organs to respond to the external stimuli. They are mainly of two types (a) Receptor organs Sense organs that receive the stimuli are called as receptors. A receptor is normally sensitive to a particular stimulus only. Some of the receptors are Read more…

Pancreas | Class X

Pancreas is a heterocrine gland (mixed gland) found in the folds of the duodenum. A portion of pancreas acts like an exocrine gland and another portion like an endocrine gland. The group of cells of endocrine pancreas is called islets of Langerhans. The cells of islet are of three types, Read more…

Adrenal Glands | Class X

There are two adrenal glands one on the top of each kidney. Internally the adrenal gland is divisible into an outer cortex and inner medulla. Cortex The adrenal cortex secretes many hormones, commonly called corticoids. (a) Mineralcorticoids: It acts on kidney and promotes absorption of Na and water into blood Read more…

Photoperiodism | Class X

It can be defined as a phenomenon or response of plants to the changing relative lengths of day and night called photoperiods. Photoperiod refers to the relative length of day or the light period (duration of light). Plants respond to a photoperiod due to the presence of light receptor pigment Read more…