Exam 1: Human Physiology- UARK Walker | Questions & Expertly Verified Answers | 2026 | 2027. Quiz_________________? -A single protein may have multiple active sites for multiple ligands OR multiple sites for one ligand -Protein Y is very specific t

Exam 1: Human Physiology- UARK Walker | Questions & Expertly Verified Answers | 2026 | 2027. Quiz_________________? -A single protein may have multiple active sites for multiple ligands OR multiple sites for one ligand -Protein Y is very specific to Ligand C (increasing the specific molecule shape and active site, increase the specificity 'highest') - ANSWER Chemical Specificity Quiz_________________? -Hypertonic means that the environment outside of the cell has a higher concentration of solutes than the cell itself -Hypotonic means that the environment outside the cell has a lower concentration of solutes than the cell itself -5% dextrose and normal saline have the same tonicity as the rest of the body fluids so they do no harm to the cells and allow them to remain isotonic - ANSWER Define the terms isotonic, hypotonic, and hypertonic, and explain why hospitals use 5% dextrose and normal saline as intravenous infusions Quiz_________________? (aka cardiovascular system) This system works as the transportation highway for the body. It consists of the heart, blood, and blood vessels. It transports substances such as oxygen, carbon dioxide, and nutrients in the body. - ANSWER 5/11: circulatory system Quiz_________________? •A difference in concentration of solutes exists on either side of the membrane •Membrane must be _impermeable_ to the solute making the water move •The net movement of water is from the side with more water (diluted, low solute) to the side with less water (concentrated, high solute). - ANSWER osmosis Quiz_________________? •A ligand is any molecule or ion that is bound to a protein by one of the following forces: - Electrical attractions -Weaker attractions due to hydrophobic forces between nonpolar regions on the two molecules •The region of a protein to which a ligand binds is known as an active site. •When a ligand binds to a protein the proteins' specific function may either be activated or inhibited - ANSWER Ligand Quiz_________________? •An unequal distribution of charges exists across the membrane, leaving the inside cell negatively charged compared to the outside - ANSWER Describe the membrane potential and explain how it is produced Quiz_________________? •Connect, anchor and support structures in the body •Bone •Cartilage •Connective tissue proper -Protein/collagen fibers -Adipose tissue •Blood •Structure: extracellular or connective tissue 'matrix' lies between all the types of connective cells - ANSWER Connective Cells and Tissue Quiz_________________? •Enzyme can be defined as a protein catalyst. •Enzymes increase the rate of a reaction in other words Lowers the activation energy of the reaction •The reaction could have occurred without the enzyme, just much slower • Enzyme itself is unchanged •A single catalyst molecule can act over and over again to catalyze many reactions •Enzymes end in -ase - ANSWER Use examples to explain how enzymes function as catalysts Quiz_________________? •Generate mechanical force •Three types: • Skeletal- voluntary •Cardiac-involuntary •Smooth-involuntary - ANSWER Muscle Cells and Tissue Quiz_________________? •In order to bind properly proteins must have the right conformational shape. •The active (binding) site determines the type of chemical that is bound. •Some sites only bind one ligand while others can bind many ligands. •the shape of the proteins so important, Example: Drugs. The more sites a drug binds to, the higher the chance of unwanted side-effects. - ANSWER binding sites