Question 1

Blood is a connective tissue made up of cells and a fluid called _____

Accepted Answer

Plasma is the fluid portion of blood that contains various proteins and other components such as electrolytes, hormones, and waste products.

Question 2

DNA is contained primarily in the _____ of a cell

Accepted Answer

DNA is primarily contained in the nucleus of a cell. Although mitochondrial DNA does exist, it is much smaller and less significant than the DNA found in the nucleus. The cell membrane and Golgi apparatus do not contain DNA.

Question 3

The accessory organs are organs that participate in digestion but are not part of the GI tract, and include the _____

Accepted Answer

The salivary glands secrete saliva to moisten and begin the digestion of starches in the mouth. The pancreas secretes enzymes that digest carbohydrates, proteins, and lipids in the small intestine. The liver produces bile, which is required for the digestion and absorption of fats, and stores glucose as glycogen or converts it to fat for storage. The gallbladder stores and concentrates bile and releases it into the small intestine as needed. The appendix is not an accessory organ involved in digestion, and the spleen and kidney are not accessory organs involved in digestion at all.

Question 4

The hormone insulin, which is produced by the cells of the pancreas, is released into the surrounding extracellular fluid by an energy-requiring process called _____

Accepted Answer

Insulin is released by exocytosis, which is a process where secretory vesicles fuse with the plasma membrane and release their contents into the extracellular fluid. This process requires energy in the form of ATP.

Question 5

How many organ systems do humans have?

Accepted Answer

Humans have 11 organ systems, including the circulatory, respiratory, digestive, excretory, nervous, endocrine, immune, skeletal, muscle, integumentary, and reproductive systems.

Question 6

The digestive system consists of the organs of the GI tract and _____ organs

Accepted Answer

The accessory organs include the liver, pancreas, and gallbladder, which aid in digestion but are not part of the actual GI tract.

Question 7

What system controls physiological functions through production and release of hormones?

Accepted Answer

The endocrine system is responsible for producing and releasing hormones that control various physiological functions in the body. The reproductive, digestive, and muscular systems have their own functions, but they do not control physiological functions through hormone production and release in the same way as the endocrine system.

Question 8

Which cellular organelles are responsible for converting the energy in glucose, fatty acids, and amino acids into ATP, a form of energy that the cells can use?

Accepted Answer

Mitochondria are responsible for converting the energy in glucose, fatty acids, and amino acids into ATP through the process of cellular respiration. Peroxisomes and lysosomes are involved in intracellular digestion and metabolism of lipids and proteins, respectively, while ribosomes are responsible for protein synthesis.

Question 9

The gastrointestinal tract can be thought of as a hollow tube that runs from the _____

Accepted Answer

The gastrointestinal tract includes all organs that are involved in the digestion and absorption of food, such as the mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus. It is a continuous tube that runs from the mouth to the anus.

Question 10

Organs consist of _____

Accepted Answer

Organs consist of two or more different types of tissue working together to perform a specific function. These tissues can include muscle, nervous, connective, and epithelial tissue. Therefore, option C is the correct choice. Options A, B, and D are not correct because they do not accurately describe the makeup of organs.

Question 11

The layers of the GI tract carry out its functions of motility, movement, _____

Accepted Answer

The layers of the GI tract are responsible for secreting digestive enzymes and mucus, communicating with the nervous system and brain to coordinate digestion, and protecting the body from harmful substances in the digestive tract. They do not directly play a role in circulation, aspiration, or excretion.

Question 12

Which of the following aids in the circulation of dietary fat away from the GI tract?

Accepted Answer

Lymphatic vessels in the GI tract absorb dietary fats and transport them away from the GI tract towards the thoracic duct, which ultimately empties into the bloodstream. This process is known as lymphatic absorption or chyle transport. The mucosa and muscularis layers of the GI tract are not directly involved in this process. The serosa layer is the outermost layer of the GI tract and provides a protective covering.

Question 13

Maria was complaining of abdominal pain, bloating, and gas The dietitian asked her if she was having any problems with egestion The dietitian was asking her if she was having difficulty with _____

Accepted Answer

Egestion refers to the process of expelling solid waste material from the body. Therefore, the dietitian was asking Maria if she was having any difficulty with bowel movements or elimination. Choice A refers to the absorption of nutrients, not elimination. Choice B refers to acid reflux, which is a separate issue related to the stomach and esophagus. Choice C refers to protein digestion, which is not directly related to egestion.

Question 14

The gastrointestinal tract consists of how many layers that carry out its functions?

Accepted Answer

The gastrointestinal tract consists of four layers: the mucosa, submucosa, muscularis externa, and serosa or adventitia, each contributing to its functions.

Question 15

By detecting an imbalance, communicating information about this imbalance, and responding to this imbalance, the body is able to maintain _____

Accepted Answer

Homeostasis refers to the maintenance of stable internal conditions in the body, and the processes of detecting, communicating, and responding to imbalances are essential for achieving this. The other options (growth, mental acuity, gastric motility) may be influenced by these processes, but are not the primary focus of homeostasis.

Question 16

Which type of tissue plays an important role in communications within the body?

Accepted Answer

Neural tissue, such as neurons and glial cells, are responsible for transmitting and processing information throughout the body's nervous system, making it crucial for communication within the body.

Question 17

The accessory organs of the digestive system release a variety of _____ needed for digestion

Accepted Answer

The accessory organs of the digestive system, such as the salivary glands, liver, gallbladder, and pancreas, release a variety of secretions needed for digestion, including enzymes, bile, and bicarbonate.

Question 18

The gastrointestinal tract has three functions, one of which is digestion What are the other two?

Accepted Answer

The gastrointestinal tract has three functions: digestion, absorption, and egestion/excretion. Digestion involves the breakdown of food into smaller molecules, absorption involves the transfer of nutrients from the digestive system into the bloodstream, and egestion/excretion involves the elimination of waste products from the body through the rectum and anus. Choice D correctly identifies these three functions.

Question 19

What is the term for the type of tissue in the human body that provides a protective layer on skin and the lining of body cavities?

Accepted Answer

The tissue that provides a protective layer on skin and the lining of body cavities is epithelial tissue.

Question 20

What does the muscularis do?

Accepted Answer

The muscularis is a layer of smooth muscle in the digestive tract that contracts in a coordinated way, mixing and propelling food through the GI tract. This allows for proper digestion and absorption of nutrients.

Quiz 3: Chemical, Biological, and Physiological Aspects of Nutrition