Bio 161 exam - Study guides, Class notes & Summaries

BIO 161 EXAM 3 PSU QUESTIONS AND ANSWERS A+ GRADED Secretion converting an electrical signal to a chemical signal -allowing neurons to communicate with each other presynaptic neuron sending neuron postsynaptic neuron receiving neuron Where are neurotransmitters synthesized? How are they transported? -cell body -in vesicles to axon terminals Neurotransmitters are derived from? amino acids like dopamine or norepinephrine -some can be gaseous or made of other chemicals (acetyl...

The skeletal system is a dynamic system of _______________ tissue and a balance between _______________ and _______________ -️️connective; production; remodeling _________________ function holds the body upright and supports muscles and organs - ️️support _________________ function encloses important organs - ️️protection ____________________ function provides attachment sites for muscles -️️movement electrolyte and acid/bace balance stores and releases __________ needed by...

Another name for cytosol intracellular fluid Stratum lucidum is present only in the epidermis The interior part (core) of a cell membrane is hydrophilic (can interact with water) False (the core of the lipid bilayer is comprised of hydrophobic fatty acid tails- water or the polar/charged molecules cannot easily pass through) Phospholipids contain three fatty acid tails, True or False False(phospholipids have two fatty acid tails, while triglycerides have three) Phospholipids have ________ fa...

Membrane - ️️thin layer of tissue that covers a surface, lines a cavity, or divides a space or organ amphipathic -️️having both a hydrophilic region and a hydrophobic region the major types of lipids found in cell membranes are: - ️️phospholipids most phospholipids are made up of -️️glycerol backbone attached to a phosphate group and two fatty acids the phosphate head group is - ️️hydrophillic The two fatty acid tails are -️️hydrophobic

Red bone marrow - ️️produces blood cells Skeletal System Functions - ️️-Supports soft tissues and provides attachment points for tendons of skeletal muscles -Protects the most important internal organs -Assists in movement by acting as levers for skeletal muscles -Osseous tissue stores and releases minerals, particularly calcium and phosphorus -Red marrow within bones produces blood cells -Yellow marrow within bones stores triglycerides, a source of potential energy Yellow bone m...

Bio 161: Exam 4 PSU Practice Questions and Answers (100% Verified)

Lacrimal glands are classified as ______________ glands. exocrine The tough, protective sclera consists of a high concentration of collagen fibers arranged in random order. This layer is best described as ______________. dense irregular connective tissue The choroid tissue contains melanocytes (see image), giving it a dark color. What is a function of this layer based on this characteristic? Absorbs extra light as it enters the eye The choroid tissue also contains blood vessels (see arrows in...

Ligase function - ️️Joins fragments of new DNA together into one seamless strand with phosphodiester bonds (uses ATP). What is the function of a gene? - ️️Codes for a specific protein. Where are genes located? - ️️Genes are located on chromosomes. What molecules make up the eukaryotic chromosome? - ️️DNA molecules coiled around proteins (histones). What is transformation? - ️️The uptake of foreign genetic material into a cell How did Griffith's transformation experime...

Electrons in H2 and O2 have relatively high P.E; electrons in H2O have relatively low P.E. - ️️Which statement most accurately describes the relative potential energies (P.E.) of the electrons in the following molecules: H2, O2, and H2O? -The P.E. of electrons are equivalent in all three molecules. -Electrons in H2 and H2O have relatively high P.E; electrons in O2 have relatively low P.E. -Electrons in H2 and O2 have relatively low P.E; electrons in H2O have relatively high P.E. -Elect...

skeletal system -️️dynamic system of connective tissue; living tissue functions of bone - ️️support, protection, movement, electrolyte balance, acid-base balance, blood cell differentiation support function of bone - ️️holds body upright; supports muscles and organs protection function of bone -️️enclose important organs movement function of bone - ️️provide attachement sites for muscles electrolyte and acid-base balance function of bone - ️️stores and releases ions...