primary tissue types and give the general characteristics and functions of each one. a. Epithelium - 1) It protects us from the outside world – skin. 2) Absorbs – stomach and intestinal lining (gut). 3) Filters – the kidney. 4) Secretes – forms glands. Characteristics (Traits): 1) Closely attached to each other forming a protective barrier. 2) Always has one free (apical) surface open to outside the body or inside (cavity) an internal organ. 3) Always had one fixed (basal) section
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molars and premolars‚ and mixed with saliva by the tongue. The saliva has been produced by salivary glands‚ which pour it into the mouth through salivary ducts. This process of introducing food into the mouth is called ingestion. Chewing breaks food into smaller particles so that chemical digestion can occur faster. This cutting and mixing is called mastication. Moreover‚ food is chemically digested by salivary amylase (carbohydrase) in saliva which is an enzyme (biological catalyst) which breaks down
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In turn‚ ACTH directs the adrenal cortex to secrete glucocorticoids‚ such as cortisol. The GCs then reduce the rate of secretion by the hypothalamus and the pituitary gland once a sufficient amount of GCs has been released.[34] Homeostasis is the ability of an open system to regulate its internal environment to maintain stable conditions by means of multiple dynamic equilibrium adjustments controlled by interrelated regulation
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moving the contents of the colon toward the sigmoid colon are called: Answer: mass peristalsis 7. Which of the following salivary glands produce salivary amylase‚ a carbohydrate-digesting enzyme? Answer: 1. parotid glands 2. sublingual glands 8. Which of the following is not a function of saliva? Answer: initial digestion of proteins 9. The three pairs of salivary glands that secrete into the oral cavity include: Answer: parotid‚ sublingual‚ and submandibular 10. Crushing‚ mashing‚ and grinding
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stream‚ for instance. Digestion is a form of catabolism: a break-down of larger food molecules to smaller ones. In mammals‚ food enters the mouth‚ being chewed by teeth‚ with chemical processing beginning with chemicals in the saliva from the salivary glands. This is called mastication. Then it travels down the esophagus into the stomach‚ where hydrochloric acid kills most contaminating microorganisms and begins mechanical break down of some food (e.g.‚ denaturation of protein)‚ and chemical alteration
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W. HENRY et al.: Polytene Chromosomes of S. (Nevermannia) praelargum UNCORRECTED PROOF Polytene Chromosomes of an Indian Himalayan black fly Simulium (Nevermannia) praelargum (Diptera: Simuliidae) Willie HENRY1‚ Subrata Kumar DEY2‚ Rakesh VARMA1‚ Sachin THAPA1‚ William S PROCUNIER3 1 2 P.G. Department of Zoology‚ Darjeeling Government College‚ Darjeeling‚ West Bengal 734101‚ India School of Biotechnology‚ West Bengal University of Technology‚BF-142‚ Sector 1‚Salt Lake City‚ Kolkata 700064
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probably also have gained insights into similarities and differences between species. On the second page of this test‚ arrange the following species into your own phylogenetic tree diagram you believe based on their shared characteristics. (a) Drosophila melanogaster (fruit fly) (b) Ectoedemia castaneae (moth) (c) Hyla cinerea (tree frog) (d) Rattus rattus (rat) (e) Danio rerio (zebrafish) (f) Homo sapiens (human) (g) Saccharomyces cerevisiae (yeast) (h) Lumbricus terrestris (earthworm) (i) Sus scrofa
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digestive juices from various glands absorption of water‚ vitamins‚ minerals absorption of digestive end products of carbohydrates‚ proteins‚ fats water balance acid-base balance electrolyte balance maintenance of blood sugar level production of RBC DIGESTIVE SYSTEM ACCESSORY DIGESTIVE SYSTEM mouth teeth tongue liver oropharynx Gall-bladder oesophagus pancreas stomach Digestive glands small intestine large intestine‚ anal canal SALIVARY GLANDS 1. Parotid 2. Submaxillary
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tonsillitis. Food is first processed (bitten off) by teeth‚ especially the anterior incisors. Suitably sized portions then retained in closed mouth and chewed or masticated (especially by cheek teeth‚ premolars‚ molars) aided by saliva Ducted salivary glands open at various points into mouth. This process involves teeth (muscles of mastication move jaws) and tongue (extrinsic and intrinsic muscles). Mechanical breakdown‚ plus some chemical (ptyalin‚ enzyme in saliva). Taste buds allow appreciation
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Mealworms and Caffeine Caffeine is the most commonly used stimulant in the United States. In North America‚ sixty to seventy five percent of caffeine consumption comes from coffee and fifteen percent to thirty percent comes from tea. It can be found in a variety of forms including: coffee‚ tea‚ chocolate‚ soft drinks. Caffeine is a part of a family of drugs known as methylxanthines.To work‚ caffeine disrupts the neurotransmitter adenosine. Caffeine is known to cause physical dependence in humans
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