Tag: locomotion and movements

• In physiology, a stimulus is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity. 
• When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex. Hence, Example of stimulus is Hunger, Sadness and Ache.
So, the correct answer is 'All of the above'.

• The stimulus(singular) is any change in the organism's internal or external environment that causes the organism to react.
• The ability of an organism to respond to external stimuli is called sensitivity. For example, Plants grow towards light(external stimuli) sources, and if the direction of light is changed, the plant will also change its direction of growth to accommodate for survival.
  
• So, the correct answer is 'Sensitivity'.

• Nociceptors are sensory receptors which detect signals from damaged tissue 
• These receptors detect the damaged tissue or threat of damage to tissue and send signals to the spinal cord and the brain.
• Examples for Nociceptive pain includes  sprains, bone fractures, burns, bumps, bruises, inflammation .
• Hence Nociceptors detect 'Tissue damage'.
• So, the correct answer is 'Tissue damage'.

• A receptor is a protein molecule usually found embedded in the plasma membrane surface of the cell that receives chemical signals from outside the cell and when such chemical signals bind to the receptor, They cause some form of cellular or tissue response.
• There are four main types of receptors: mechanoreceptors(touch and pressure), thermoreceptors(heat), pain receptors(pain), and proprioceptors(position and movement).
• Hence Receptors to both touch and pressure are called as Mechanoreceptors.
• So, the correct answer is 'Mechanoreceptors'.

•  Locomotion is when the movement of a part of the body leads to change in the position and location of the organism. 
•  In multicellular animals, these movements include walking, running, jumping, crawling, climbing, swimming, flying, galloping, slithering, and so on. 
• Cytoplasmic streaming, also called protoplasmic streaming, the movement of the fluid substance (cytoplasm) within a plant or animal cell.  If one of the proteins remains fixed on a substrate, such as a microfilament or a microtubule, the motor proteins can move organelles and other molecules through the cytoplasm. 
•  In some unicellular organisms, such as amoeba, it provides the mechanism for cell locomotion. Hence, Streaming of protoplasm in amoeba is an example of Movement.
So, the correct answer is 'Movement'.

Movement is a characteristic feature of living organisms. The different types of movement exhibited by cells of the human body are: 

• Amoeboid movement: Leucocytes present in the blood show amoeboid movement. 
• Ciliary movement: Reproductive cells such as sperms and ova show ciliary movement.
•  Muscular movements:  Muscle tissue found inside of the heart, digestive organs, and blood vessels serve to move substances throughout the body. Hence, The cells of the human body exhibits type of movement are Amoeboid, Ciliary and Muscular.

Locomotion can be seen in  different media. 
Animals move through, or on, four types of environment: 

• Aquatic (in or on water), 
• terrestrial (on the ground or other surfaces, including arboreal, or tree-dwelling),
•  fossorial (underground), and 
• aerial (in the air). Hence, Swimming is the form of locomotion.

• Animals move for a variety of reasons, such as to find food, a mate, a suitable microhabitat, or to escape predators.
•  For many animals, the ability to move is essential for survival and, as a result, natural selection has shaped the locomotion methods and mechanisms used by moving organisms. Hence, The purpose of locomotion is to search Food, Shelter and Mate. So,the correct answer is 'All of the above'.