Green filamentous Slime molds Fungi Animals Entamoebae Gram+ bacteria Animals Spirochetes Chlamydiae Green nonsulfur bacteria Methanosarcina Slime molds Plants Algae Gram Methanobacterium Fungi Proteobacteria Methanococcus Actinobacteria Halophiles Plants Ciliates Cyanobacteria Planctomyces T. celeer Planctomycetes Spirochetes Protozoa Thermoproteus Flagellates Bacterioides Pryodictium Trichomonads Fusobacteria cytophaga Microsporidia Diplomonads Crenarchaeota Nanoarchaeota' Euryarchaeota Cyanobacteria (blue-green algae) Thermophilic Thermotoga Aquifex sulfate-reducers Proteobacteria Acidobacteria Bacteria Archaea Eukarya Rooted phylogenetic tree Unrooted phylogenetic tree Which of the following statements is true? O Fungi and slime molds are more closely related than plants and animals. O The length of the branches indicates time. O Branching points stand for the common ancestor of two diverging groups. O Bacteria and Archaea have different common ancestors.
Anatomy and Physiology of Special Sensory Organs
Sensory organs can be labeled as special sensory structures that permit sight, hearing, odor, and flavor. Sensory structures permitting proprioception, touch, thermal, and pain perception can be classified as more advanced sensory organs. The sensory neurons are trained to find out modifications in the external and internal conditions so that a person's body can react to that change. A stimulus is the first signal that is recognized by any sensory receptor of the body. Stimulus is an impulse generated when there is a change in the surroundings of a person. For example, a heated environment will alert the brain through the thermal sensory organs and generate a reflex accordingly.
Sensory Receptors
The human sensory system is one of the most complex and highly evolved structures, which processes a myriad of incoming messages. This well-coordinated system helps an organism or individual to respond to external stimuli, appropriately. The sensory receptors are an important part of the sensory system. These receptors are specialized epidermal cells that respond to external environmental stimuli. These receptors consist of structural and support cells that form the peripheral unit of the receptor and the neural dendrites which receive and detect the external stimuli.
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