Bio 235 Exam 1 with correct Answers
Chemical Level - Correct Answers -a molecule in the membrane that encloses a cell
Cellular level - Correct Answers -a cell in the stomach lining
Tissue level - Correct Answers -layers of the tissue in the stomach wall
Organ level - Correct Answers -the stomach
body system level - Correct Answers -digestive system
Types of tissues - Correct Answers --muscle
-nervous
-epithelial
-connective
muscle tissue - Correct Answers --skeletal (moves skel)
-cardiac (pumps blood)
-smooth (controls movement through hollow tubes and organs
made of fibers and contracts
epithelial tissue - Correct Answers -A body tissue that covers the surfaces of the body,
inside and out
(sheets + glands)
-exchanging material bw cell and its environment
ex. skin,cheeks, inside bladder
connective tissue - Correct Answers -provides support for your body and connects all its
parts
-few cells dispersed in an extracellular matrix
ex. bone, cartilage = ex matric
blood= liquid matrix
nervous tissue - Correct Answers -transmits electrical impulses
,Homeostasis - Correct Answers -Maintaining a stable internal environment
--essential for survival of each cell. each cell helps maintain internal environment
ex.
-conc of nutrients
-conc of O2 and CO2
-ph
-conc of waste products
-conc of water, salt, and other eltrolytes
Extracellular fluid - Correct Answers -is the internal environment
--fluid outside the cell
-compose of plasma and interstitial fluid
Homeostasis doesn't imply that - Correct Answers -ECF is unchanging or body doesn't
go out of balance, sometimes it has to
negative feedback - Correct Answers -Maintains homeostasis and opposes and initial
change
--change in control variable triggers a response that drives the variable in the opposite
direction of initial change, thus opposing the change
Neg feedback w/i body - Correct Answers --control center (hypothalamus)
-sensor (nerve cell)
-effector (sweat gland)
Ex. Body temp.
positive feedback - Correct Answers -amplifies an initial change
Ex. oxytocin release at childbirth
-movies system away from set point
Rough Endoplasmic Reticulum - Correct Answers ---primary function is to synthesize
proteins and lipids
-Rough due to the presence of ribosomes.
Transports substances such as proteins within the cytoplasm
aka transports and storage
, Smooth Endoplasmic Reticulum - Correct Answers --lacks ribosomes
-central packaging and discharge site for molecules to be transported from the ER
Peroxisomes - Correct Answers --small membrane enclosed sacs containing oxidative
enzymes
-carry out oxidative reactions that detoxify various waste and toxic foreign compounds
Golgi body - Correct Answers --products delivered from ER to be modified into finished
products
-sort, package, and direct molecules to appropriate destinations
--its sensory cells packages proteins to be exported by exocytosis
Lysosomes - Correct Answers --membrane enclosed sacs containing hydrolytic
(digestive) enzymes
-destroys foreign materials
-remove worn out cell parts
--da trash can
Mitochondria - Correct Answers --energy organelles
-enclosed by 2 membrane to form cristae
-matrix is interior gel filled cavity
-converts energy in food molecules into ATP
plasma membrane - Correct Answers -A selectively-permeable phospholipid bilayer
forming the boundary of the cells
-controls movement of molecules bw ICF and ECF
Glycolysis - Correct Answers -cycle consisting of biochemical reactions that begin the
breakdown of glucose
(2 ATP)
(converting glucose to acetyl coa to enter CAC)
-in cytosol
--outside of mito
Chemical Level - Correct Answers -a molecule in the membrane that encloses a cell
Cellular level - Correct Answers -a cell in the stomach lining
Tissue level - Correct Answers -layers of the tissue in the stomach wall
Organ level - Correct Answers -the stomach
body system level - Correct Answers -digestive system
Types of tissues - Correct Answers --muscle
-nervous
-epithelial
-connective
muscle tissue - Correct Answers --skeletal (moves skel)
-cardiac (pumps blood)
-smooth (controls movement through hollow tubes and organs
made of fibers and contracts
epithelial tissue - Correct Answers -A body tissue that covers the surfaces of the body,
inside and out
(sheets + glands)
-exchanging material bw cell and its environment
ex. skin,cheeks, inside bladder
connective tissue - Correct Answers -provides support for your body and connects all its
parts
-few cells dispersed in an extracellular matrix
ex. bone, cartilage = ex matric
blood= liquid matrix
nervous tissue - Correct Answers -transmits electrical impulses
,Homeostasis - Correct Answers -Maintaining a stable internal environment
--essential for survival of each cell. each cell helps maintain internal environment
ex.
-conc of nutrients
-conc of O2 and CO2
-ph
-conc of waste products
-conc of water, salt, and other eltrolytes
Extracellular fluid - Correct Answers -is the internal environment
--fluid outside the cell
-compose of plasma and interstitial fluid
Homeostasis doesn't imply that - Correct Answers -ECF is unchanging or body doesn't
go out of balance, sometimes it has to
negative feedback - Correct Answers -Maintains homeostasis and opposes and initial
change
--change in control variable triggers a response that drives the variable in the opposite
direction of initial change, thus opposing the change
Neg feedback w/i body - Correct Answers --control center (hypothalamus)
-sensor (nerve cell)
-effector (sweat gland)
Ex. Body temp.
positive feedback - Correct Answers -amplifies an initial change
Ex. oxytocin release at childbirth
-movies system away from set point
Rough Endoplasmic Reticulum - Correct Answers ---primary function is to synthesize
proteins and lipids
-Rough due to the presence of ribosomes.
Transports substances such as proteins within the cytoplasm
aka transports and storage
, Smooth Endoplasmic Reticulum - Correct Answers --lacks ribosomes
-central packaging and discharge site for molecules to be transported from the ER
Peroxisomes - Correct Answers --small membrane enclosed sacs containing oxidative
enzymes
-carry out oxidative reactions that detoxify various waste and toxic foreign compounds
Golgi body - Correct Answers --products delivered from ER to be modified into finished
products
-sort, package, and direct molecules to appropriate destinations
--its sensory cells packages proteins to be exported by exocytosis
Lysosomes - Correct Answers --membrane enclosed sacs containing hydrolytic
(digestive) enzymes
-destroys foreign materials
-remove worn out cell parts
--da trash can
Mitochondria - Correct Answers --energy organelles
-enclosed by 2 membrane to form cristae
-matrix is interior gel filled cavity
-converts energy in food molecules into ATP
plasma membrane - Correct Answers -A selectively-permeable phospholipid bilayer
forming the boundary of the cells
-controls movement of molecules bw ICF and ECF
Glycolysis - Correct Answers -cycle consisting of biochemical reactions that begin the
breakdown of glucose
(2 ATP)
(converting glucose to acetyl coa to enter CAC)
-in cytosol
--outside of mito
