Which layer of the endometrium is the functional layer?
The uterus is made up of an external layer of smooth muscle called the myometrium, and an internal layer called the endometrium. The endometrium has three layers: stratum compactum, stratum spongiosum (which make up the stratum functionalis) and stratum basalis.
Which of the following is a protist that causes an STD?
Trichomonosis, a sexually transmitted infection (STI) caused by the protist Trichomonas vaginalis, has significant public health relevance.
What are the four supergroups of protists?
One current classification separates all eukaryotes into five supergroups: Excavata, Chromalveolata, Rhizaria, Archaeplastida and Unikonta. Along with different groups of protists, animals and fungi are placed into the supergroup unikonta and plants are found in archaeplastida.
What is one reason why the classification of protists is difficult?
Protists are difficult to characterize because of the great diversity of the kingdom. These organisms vary in body form, nutrition, and reproduction. They may be unicellular, colonial, or multicellular.
What are the main categories of protists?
Lesson Summary
- Animal-like protists are called protozoa. Most consist of a single cell.
- Plant-like protists are called algae. They include single-celled diatoms and multicellular seaweed.
- Fungus-like protists are molds. They are absorptive feeders, found on decaying organic matter.
Why are protists so important?
Protists produce almost one-half of the oxygen on the planet through photosynthesis, decompose and recycle nutrients that humans need to live, and make up a huge part of the food chain. Humans use protists for many other reasons: Many protists are also commonly used in medical research.
What are the disadvantages of protists?
The major negative about protists is that some cause diseases, both in humans and in other organisms. Examples are amoebic dysentery, meningo-encephalitis, malaria, toxoplasmosis, and African sleeping sickness.
How can protists be helpful to humans?
Plant-like protists produce almost one-half of the oxygen on the planet through photosynthesis. Other protists decompose and recycle nutrients that humans need to live. For example, medicines made from protists are used in treatment of high blood pressure, digestion problems, ulcers, and arthritis.
How do protists harm humans?
Some severe diseases of humans are caused by protists, primarily blood parasites. Malaria, trypanosomiasis (e.g., African sleeping sickness), leishmaniasis, toxoplasmosis, and amoebic dysentery are debilitating or fatal afflictions.
What are some examples of harmful protists?
Summary
- Most protist diseases in humans are caused by protozoa. Protozoa make humans sick when they become human parasites.
- Trypanosoma protozoa cause Chagas disease and sleeping sickness.
- Giardia protozoa cause giardiasis, and Plasmodium protozoa cause malaria.
How do you get rid of protists?
Amoxicillin, penicillin, and erythromycin are common antibiotics that inhibit bacterial cell functions. Antibiotics are derived primarily from bacteria or fungi (mold), such as Penicillium. Antibiotics don’t work exclusively against bacteria: some ‘broad-spectrum’ ones are also effective against protists.
What are 3 examples of protozoa?
Some examples of protozoa are Amoeba, Paramecium, Euglena and Trypanosoma.
Where do protozoa live?
Protozoa are single celled organisms. They come in many different shapes and sizes ranging from an Amoeba which can change its shape to Paramecium with its fixed shape and complex structure. They live in a wide variety of moist habitats including fresh water, marine environments and the soil.
What medicine kills protozoa?
Antimalarial drugs include mefloquine, chloroquine, proguanil with atovaquone and doxycycline. They kill or inhibit the growth of protozoa by affecting different stage of the parasitic life cycle. They are used both to treat and prevent malaria.
Can protozoa be killed by antibiotics?
“Antimicrobials” are drugs that kill bacteria, fungi, protozoa, or viruses. Antibiotics only kill bacteria. (Antifungals kill fungi; antiprotozoals kill protozoa; antivirals kill viruses.)
What are the signs and symptoms of protozoa?
- Symptoms commonly associated with D fragilis infection include abdominal pain, diarrhea, anorexia, nausea, vomiting, and flatulence. Bloody stools are not observed.
- Less common symptoms include fever, weight loss, and fatigue.
- Diarrhea usually lasts 1-2 weeks, whereas abdominal pain can persist for 1-2 months.
How do you detect protozoa?
The microscopic ova and parasite examination (O&P) is the traditional method for stool parasite testing. Although the O&P is labor-intensive and requires a high level of skill for optimal interpretation, this test remains the cornerstone of diagnostic testing for the intestinal protozoa.
How does protozoa make you sick?
The protozoa attach to the lining of the host’s small intestine, where they prevent the host from fully absorbing nutrients. They may also cause diarrhea, abdominal pain, and fever.