How do Planaria respond to light?
The eye spots are sensitive to light. Planarians move away from the light and are most active in the dark. Second, light and water current can be used demonstrate kinesis (change of speed) and taxis (change of direction). Planarians are also sensitive to shock.
How does Planaria respond to food?
In planarians, individual components of the feeding behavior are identified. The reaction of approaching the food object is a motor response of the body to chemical or physical signals coming from the object. As a continuation of the first response, the motor reaction of the pharynx appears aimed at capturing the food.
What type of nervous system do planarians have?
Planarians are considered to be among the most primitive animals which developed the central nervous system (CNS).
What does a planarian use for a brain?
The brain of these free-living flatworms is a bilobed structure with a cortex of nerve cells and a core of nerve fibres including some that decussate to form commissures. Several neurotransmitter substances identified in the human brain also occur in the planarian nervous system.
How do you get rid of hookworms in humans?
Anthelminthic medications (drugs that rid the body of parasitic worms), such as albendazole and mebendazole, are the drugs of choice for treatment of hookworm infections. Infections are generally treated for 1-3 days. The recommended medications are effective and appear to have few side effects.
What does hookworm rash look like?
Key points about creeping eruption Hookworms are found in dogs and cats. Exposure to moist sand that has been contaminated by dog or cat feces can cause creeping eruption. Creeping eruption appears as a winding, snake-like rash with blisters and itching.
Can humans get hookworms from cats?
Can hookworms be transmitted to humans? Feline hookworms do not infect humans internally. However, the tiny larvae can burrow into human skin, causing a disease called cutaneous larval migrans. Also known as ‘ground itch’, this skin infection does not lead to maturation of the larvae.
Can worms make a cat aggressive?
University of Chicago researchers say a parasite commonly spread from cats to humans may play a role in impulsive aggression. Their research into the parasite, toxoplasma gondii, is part of their broader effort to improve diagnosis and treatment of people with recurrent bouts of extreme anger such as road rage.
What is mad cat disease?
Overview. Toxoplasmosis (tok-so-plaz-MOE-sis) is a disease that results from infection with the Toxoplasma gondii parasite, one of the world’s most common parasites. Infection usually occurs by eating undercooked contaminated meat, exposure from infected cat feces, or mother-to-child transmission during pregnancy.