Биология - Пошаговая помощь с домашним заданием по биологии - 25

1. Which of the following are the properties of the members of the family Vibrionaceae ? They are: gram-negative 2.alkaliphiles 3 . comma-shaped bacteria 4 anaerobes

Choose one correct answer: 2. Glycogen mobilization reactions take place A. in mitochondria B. in lysosomes C. in the cytosol D. in the endoplasmic reticulum E. in the nucleus 3. The rate of which metabolic pathway increases during fasting in the liver? A. glycolysis B. synthesis of fatty acids from glucose C. synthesis of glycogen D. mobilization of glycogen E. pentose phosphate pathway 4. The enzyme involved in gluconeogenesis is A. hexokinase B. fructose-1,6 -bisphosphatase C. phosphofructokinase D. pyruvate kinase E. pyruvate dehydrogenase 5. Gluconeogenesis reactions take place: A. in mitochondria and cytosol B. only in the cytosol C. only in mitochondria D. only in lysosomes E. in lysosomes and mitochondria Select all the correct answers: 6. The rate of glycogen synthesis increases A. after eating a carbohydrate-rich meal B. under the influence of insulin C. under the influence of glucagon D. during fasting E. during physical exertion

2. Cembu cocronulue u3 CKO/Ibkux Aeren nonyualoT MarepuHCKuM kanuran? 1). u3 AByx 2). M3 TpëX 3). Vis yetblpëx 4). VB natu

3. Epithelial Tissue and Glands Read: 1. Lectures. 2. M.H. Ross "Histology", pp. 98-145 Tasks 1. Write out the epithelial tissue functions: (1) (2) (3) (4)

Educational and research task 4. Determine the main types of motor activity of the digestive tract. - Motor function is carried out by __ muscles at the beginning and end of the digestive tract. The main and auxiliary __ muscles are involved in chewing, the muscles of the __ and the muscles of the upper third of the esophagus are involved in swallowing, __ control of defecation is carried out through the external sphincter of the rectum. - Below the upper third of the esophagus to the external sphincter of the rectum motor function is realized by __ muscles. In the wall of the digestive tract,an external __ and __ layers of smooth muscle cells. Myocytes are electrically connected with each other through a large number of nexuses, thanks to which it is possible to conduct excitation from one cell to another, that is, the muscle layer functions as a syncytium . As a result of electrical activity slowly spreading through in the cell membrane , there is an almost continuous excitation of the smooth muscles of the gastrointestinal tract. There are two types of electrical activity: (1) __ ; (2) __ 1.1 __ are slow wave-like changes in the membrane potential. Theiramplitude usually varies from 5 to 15 mV. The cause of slow waves is the spontaneous activity of pacemaker smooth muscle cells From them the depolarization wave propagates through electrical contacts along longitudinal and circulatory layers of muscle cells. Slow waves usually do not by themselves cause muscle contractions in the gastrointestinal tract, except for;perhaps the stomach. Instead, they mainly cause the appearance of action potentials, and PD, in turn, cause muscle contraction. 1.2 __ is formed when the membrane potential is reached -40mV (the maximum value of the membrane potential of a smooth muscle cell of the gastrointestinal tract varies from -50 to -60mV ). The higher the amplitude of the slow waves , the action potential occurs more often; usually the frequency varies from 1 to 10 action potentials per second. Each

Помощь с домашним заданием по биологии