Ento Exam 1

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austin55
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Last updated: February 25, 2026
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First submittedFebruary 25, 2026
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Beeswax/honey, shellac, dye, silk
Commercial products from insects
Escape from old cuticle
Ecdysis
Internal tubular element through which air moves
Trachea
Moving through soil, large forelegs with claws
Fossorial
Can digest polyethelene
Plastivore
No antennae, 4 pairs of legs, 2 body regions/tagmata (cephalothorax, abdomen)
Chlicerata
Locomotion section
Thorax
Secretions to nourish stored sperm
Spermathecal gland
Hair-like/spine cuticular extensions
Setae
Swimming legs, often flattened and hairy
Natatorial
Corpora Cardiaca releases this to start molting process by activating prothoracic glands to secrete ecdysone
PTTH
Produces Juvenile Hormone
Corpora Allata
Innervates eyes, antennae, and labrum, processes signals that arrive from the body
Brain
Seperate waste products to be excreted from nutrients that are returned to "blood"
Malpighian tubules
Typically stimulates molting
Weight
Temporary food storage area
Crop
Light sensitive cells without optical system
Dermal detection
Grasping hair shafts
Prehensile
Form of insect between molts
Instar
Ingestion, storage, grinding, transport of food to the next region
Foregut
The formation of new cuticle and shedding of old cuticle
Molting
Primary site for enzyme digestion of food and absorption of nutrients
Ventriculus
Labium of proboscis extend and form membranous lobe
Labellum
Feed on wood
Xylophages
Walking legs, femur and tibia same length
Grassorial
Digestive and reproduction section
Abdomen
Feed on excrement
Coprophages
Old cuticle remnant, exocuticle and epicuticle
Exuvium
Obtain nutrients from decomposing plant/animal biomass
Saprophages
Certain number of molts and then ends at adult stage
Determinate growth
Mechanical stimuli, pressurized, sound/touch/vibrations
Mechanosensilla
A cuticular sensory organ, inverted
Sensillium
A rubber-like or elastic protein in some insect cuticle
Resilia
Brain and series of ganglia joined by paired longitudinal nerve cords interconnected network of nerve cells, information processing, behavavior coordination
Central nervous system
Slender and long form hollow needle with two channels and a sheath
Stylet
Separation of cuticle from epidermis
Apolysis
An aggregation of ommatidium, each acting as a single facet of the eye
Compound eye
Integument of the insect, external, hardened, cuticular skeleton to which muscles are attached internally, barrier against desiccation, provides structure/support, surface for internal muscle attachment, protection from damage and infection, sensory interface with environment
Exoskeleton
Cross-linked proteins, creating rigid plates, darkens
Exocuticle
Glossa
maxilae and labium form tongue
Body cavity between alimentary canal and integument
Hemocoel
1. Apolysis
2. Epidermal cells secrete new epicuticle
3. Old endocuticle digested and absorbed
4. Remnant of old cuticle separates/opens along weak line (suture)
5. Ecdysis & Exuvium
6. Expansion
7. Procuticle differentiates into endo- and exo- cuticle
Molting
Absorption of water, salts, essential nutrients prior to feces elimination
Hindgut
Sclerotized plate of body wall
Sclerite
2 body regions (cephalothorax, abdomen), 2 pairs antennae, different amounts of leg pairs for different examples
Crustacea
Lower lip
Labium
Vision, detects light
Photosensilla
Wings develop externally
Exoterygote
Elongated maxilae that extends by blood pressure
Proboscis
External opening to tracheal tubes
Spiracle
Produce seminal fluid, spermataphore
Male accessory glands
The breakdown of food to extract nutrients and other substances for use by cells for energy, growth, or reproduction
Digestion
Cement layer protects from abrasion, wax layer creates barrier to water movements
Epicuticle
Hint
Answer
Determines the body form/outcome of the molt, inhibits development of adult characteristics
Juvenile Hormone
Seizing prey, enlarged forelegs
Raptorial
No metamorphosis, non-insect hexapods and apterygote insects
Ametabolous
Innervates mandibles, maxillae, labium
Suboesophageal ganglion
Upper lip
Labrum
Undifferentiated portion of the procuticle
Endocuticle
Stiffening of the cuticle by cross-linkage of protein chains
Sclerotization
Protects digestive cells without inhibiting nutrient absorption
Peritrophic membrane
Sensory to sample food before ingestion
Palps
Chemicals sent from cells in one part of an organism to cells in another part of the same individual
Hormones
An individual unit of the eye composed of a lens and receptor cell
Ommatidium
Wings develop internally
Endoterygote
Accessory jaws that assist mandibles in processing food
Maxillae
Centipede: 2 body regions (head, trunk), one pair of antennae, one pair of legs per segment, legs extend laterally
Millipede: 2 body regions (head, trunk), one pair antennae, 2 par of legs per segment, legs extend underneath trunk
Myriapoda
Continue molting, no terminal molt
Indeterminate growth
Specialized body regions
Tagmata
Soft, flexible cuticle without sclerotization
Membrane
Incomplete metamorphosis
Hemimetabolous
Plate on insect's back
Notum
Pumps/pushes food into gut
Pharynx
Relatively abrupt change in body form and physiology between immature and adult stages
Metamorphosis
Simple eye that detects changes in light intensity
Oceli
Side plate
Pleuron
Extinct subphylum of Insects
Trilobita
Winged adult insects
Pterygotes
Non-winged adult insects
Apterygotes
Insect "blood", plasma with water minerals vitamins proteins and other macromolecules, free moving cells, not involved in oxygen transport
Hemolymph
Moves food into storage area
Esophagous
Jaws that cut/macerate food
Mandibles
Single layer secretory tissue, produces cuticle layers
Epidermis
Chitin microfibers surrounded by matrix of protein
Procuticle
Stores sperm until needed for egg fertilization
Spermatheca
Nitrogen containing polysaccharide, repeating units of monosaccharides to form chains, grouped into bundles, bundles aligned parallel to make sheets, deposited at different angles for strength
Chitin
Hemolymph fills body cavity, does not travel in veins and arteries
Open system
Chemical stimuli, taste/smell
Chemosensilla
Chewing mouthparts
Mandibulata
Running legs, long and slender
Cursorial
Gas exchange, absorbing O2 and expelling CO2
Respiration
Bottom plate
Sternum
Pumps hemolymph from thorax and abdomen into head
Dorsal organ
Fin tubule that connects to respiring tissue
Trachaele
3 pairs of legs, 3 tagmata (head, thorax, abdomen), one pair of antennae
Hexapoda
Cuticular plates that grind solid food
Proventriculous
Digestive enzymes secreted, absorption of digestion products
Midgut
Challenge of exoskeleton
Growth
Jumping legs, enlarged femur of hindlegs, long femur and tibia
Saltatorial
Produce secretions that surround and protect eggs
Female accessory glands
Procuticle and Epicuticle
Cuticle
Sensory and ingestive body section
Head
Complete metamorphosis
Holometabolous
The process of eliminating metabolic waste
Excretion
Seperates body cavity (hemocoel) from integument
Basement membrane
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