HOW DO ORGANISMS REPRODUCE: Short Answer Type Questions Class 10th Chapter 10 JKBOSE/NCERT Short Answer Type Questions Question 1. List and explain in brief three methods of contraception. Ans: Three methods of contraception: a) Barrier Methods: Barrier methods of contraception involve the use of physical barriers to prevent sperm from reaching the egg. Examples include …
CONTROL AND CO-ORDINATION
What is the function of receptors in our body? Think of situations where receptors do not work properly, what problems are likely to arise?
Ans: Receptors in our body are specialized cells or structures that detect and respond to stimuli from the environment or within the body. They play a crucial role in sensory perception and relay information to the nervous system.
When receptors do not work properly, it can lead to various problems depending on the specific receptors affected. Here are a few examples:
A. Loss of vision: Malfunctioning of the photoreceptors in the eyes can lead to visual impairments or blindness.
B. Hearing loss: Dysfunction of the auditory receptors in the inner ear can result in hearing loss or deafness.
C. Reduced sense of touch: Impaired receptors in the skin can diminish the ability to sense temperature, pressure, or pain.
D. Altered taste and smell perception: Dysfunction of taste buds or olfactory receptors can affect the ability to taste or smell properly.
E. Balance and spatial orientation issues: Problems with receptors in the inner ear responsible for detecting motion and maintaining balance can cause dizziness, vertigo, or difficulties with coordination.
In general, when receptors do not work properly, it can disrupt the transmission of sensory information to the brain, leading to sensory deficits, impaired perception, or difficulties in coordinating responses to the environment.
How many types of movements are shown by plants? Explain with examples.
Ans: Plants exhibit various types of movements, including:
Phototropism: The movement of a plant in response to light. For example, the growth of a plant towards a light source is positive phototropism, while growing away from light is negative phototropism.
Gravitropism: The response of a plant to gravity. Roots show positive gravitropism by growing towards gravity, while stems show negative gravitropism by growing against gravity.
Thigmotropism: The response of a plant to touch or physical contact with an object. Examples include the coiling of tendrils around support structures or the curling of tendrils around a trellis.
Hydrotropism: The movement of a plant in response to water. Roots exhibit positive hydrotropism by growing towards a water source.
Ans: Geotropism (also known as gravitropism) is the growth or movement of a plant part in response to gravity, where the roots grow downwards (positive geotropism) and the shoots grow upwards (negative geotropism).