biology lab exam #1
Tendons are composed of which connective tissue?
Dense connective tissue
What are important to the chemical reactivity, osmotic effects, and electrical excitability of nerve and muscle?
Electrolytes
Which tissue is multilayered with nuclei at several layers, contains cilia, and goblet cells, and is found in the respiratory tract?
Pseudostratified columnar epithelium
Which connective tissue is a mesh of reticular fibers and fibroblasts, forms a supportive stroma (framework) in lymphatic organs, and can be found in lymph nodes, spleen, thymus, and bone marrow?
Reticular tissue,
What can increase the rate of a reaction in the human body?
Temperature
What is the simplest structure considered to be alive?
cells
Which process only occurs in the plasma membrane of a living cell?
active transport
What happens to the covalent bonds in an exchange reaction?
covalent bonds are broken and new covalent bonds are formed.
What produces the collagen of areolar tissue?
fibroblast
What qualities do glycosaminoglycans (GAGs) give to the ground substance in tissue?
holding water and maintaining electrolyte balance
What is a substance that is capable of dissolving freely in water?
hydrophilic
Which channels in the plasma membrane open or close in response to changes in the electrical charge difference across the membrane?
voltage-gated ion channels
Where is elastic cartilage found in the human body?
y primarily in the external ear (auricle or pinna) and epiglottis and eustachian tub.
What is the function of dietary antioxidants?
protect the cells from the oxidative reactive oxygen species generated during various cellular processes
What are the functions of the plasma membrane?
provides protection for a cell. It also provides a fixed environment inside the cell.
What is the most abundant formed element of the blood?
red blood cells
When a hormone cannot enter a cell, what does it activate the formation of to get inside the cell?
second messenger
What is homeostasis?
state of balance among all the body systems needed for the body to survive and function correctly.
Which tissue has more matrix than cells? Hint: some forms of this are bone, adipose, and blood.
Cartilage
What are examples of oxidation?
The reaction between magnesium metal and oxygen to form magnesium oxid
What is the only polysaccharide synthesized in the human body?
glycogen
What cells found in simple columnar and pseudostratified columnar epithelia produce a protective mucous coating over the mucous membranes?
goblet
What are examples of negative feedback in the human body?
the regulation of the blood calcium level.