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PNB 2264 EXAM 1 2025 - 26 LATEST QUESTION AND ANSWERS GRADED A (100% VERIFIED UCONN EXAM) HUMAN PHYSIOLOGY AND ANATOMY 100 QUESTIONS which of the following will decrease diffusion rate? a. an increase in surface area b. a decrease in membrane thickness c. a decrease in membrane permeability d. all of the above c. a decrease in membrane permeability an anatomical section dividing the skull into anterior and posterior parts would be considered: a. transverse b. sagittal c. coronal d. midsagittal c. coronal chose the answer that best illustrates hierarchy of organization: a. blood levels of glucose are maintained within narrow limits b. organs are made up of molecules and tissues are made up of organ systems
c. diffusion occurs down a concentration gradient d. tissues are made up of cells and organs are made up of tissues e. all of the above d. tissues are made up of cells and organs are made up of tissues yotiao is a membrane bound protein that interacts with signaling enzymes inside the cytosol, but cannot interact with extracellular fluid. yortiao should therefore classified as: a. an ion channel b. glycolipid c. an integral membrane protein d. peripheral membrane protein c. an integral membrane protein epithelium that secretes molecules into the bloodstream using membranous vesicles could be classified as: a. apocrine b. mesocrine c. merocrine d. endocrine
The cells that make up lymphatic vessels (which transport fat and large bulky molecules) display fewer physical connections between themselves than blood vessels. This means that lymphatic vessels favor which type of transport? paracellular It takes 3.3seconds for glucose to diffuse 100uM (micrometers). How long does it take for glucose to diffuse 1cm (centimeters)? 33,000 seconds which of the following are characteristics of life? a. energy consumption b. reproduction c. responding to external stimuli d. growth e. all of the above e. all of the above
Groups of cells that are similar in structure and perform a common or related function form ______. a. an organ b. a tissue c. an organism d. an organ system b. a tissue an inability to absorb (take up/internalize through the tissue surface) digested nutrients and secrete digestive enzymes might indicate a disorder in which tissue type? a. epithelial b. muscle c. nervous d. connective a. epithelial
a. nervous, musculoskeletal, epithelial, blood b. blood, bone, muscle, nervous c. muscle, nervous, connective, epithelial d. skin, neuromuscular, organ, collagen c. muscle, nervous, connective, epithelial a tear in the blood vessel that exposures collagen to blood activates platelets to become sticky and secrete chemical signals, which cause more platelets to become sticky and secrete the same chemical signals. this is an example of _____ control a. closed loop, negative feedback b. closed loop, positive feedback c. feed-forward d. open-loop, positive feedback b. closed loop, positive feedback a cell is taken out of he body and placed into a test solution. the concentration of solute X in the test solution is 100mM, and the concentration of solute X inside the cell is 200mM. The cell membrane is permeable to water but not solute X. Which of the following statements is/are true?
a. there is a net flux of water out of the cell b. the test solution is hypertonic c. there is a flux of water molecules into and out of the cell d. all of the above c. there is a flux of water molecules into and out of the cell which is NOT a connective tissue cell a. bone cells b. skeletal muscle c. cartilage cells d. fat cells e. blood cells b. skeletal muscle which is NOT a feature of connective tissue? a. protein fibers in the matrix
d. as age increases, the amount of calcium in bones tend to decrease e. all of the above c. after eating large batch of salt popcorn, levels of salt in the urine increase one of the contributing factor to the onset of cerebrovascular disease is a loss of electrical and chemical communication between adjacent neurons and glial cells inside the brain. one potential therapeutic approach might be to design a drug that increases the expression of: a. desmosomes b. tight junctions c. gap junctions. d. adherens junctions e. mechanically gated ion channels c. gap junctions ______ control systems can cause "anticipatory" changes in the body before any change in blood levels of a regulated variable a. closed or open loop; negative feedback
b. closed loop, negative feedback c. open loop d. closed loop, positive feedback c. open loop which of the following tissues are avascular? a. cartilage b. bone c. both d. neither a. cartilage the bacteria responsible for food poisoning secrete a toxin that breaks down intercellular junction between cells in your digestive system, allowing them to enter your tissues and make you sick. this toxin should allow the bacteria to enter a. transcelluarly b. paracellularly c. both of the above d. none of the above
in a living cell, the time increases by a factor of two, then the distance a particle diffuses would: a. increase by a factor of two b. increase by a factor more than two c. increase by a factor less than two d. decrease by a factor of two e. decrease by a factor more than two c. increase by a factor less than two extracellular fluid consists of: a. blood plasma b. fluid between cells c. fluid inside of cells d. a and b d. a and b
phospholipids, a major component of the lipid bilayer, as classified as amphipathic molecules because: a. they contain hydrophobic fatty acid residues and hydrophobic phosphates b. they contain polar head and non-polar tails c. they are able to interact with water d. all of above b. they contain polar head and non-polar tails the purpose of positive feedback mechanisms is to ____ a. cause rapid change in the body b. anticipate changes in the environment c. return a variable towards the set point d. maintain a relatively constant internal environment e. detect changes in the external environment a. cause rapid change in the body
d. thumbs posted to the sides e. feet spread apart e. feet spread apart which terms means toward or at the body of the body, behind? a. anterior b. lateral c. distal d. dorsal d. dorsal the heart is ____ to the arms medial to divide the brain into left and right halves, one would perform a _______ section along the midline midsagittal
A woman in her 60s is rushed to the emergency department (ED) after having lost consciousness at a Singing Christmas Tree event. The emergency medical technician (EMT) reports that in addition to losing consciousness, the woman was tachycardic (~100 bpm), warm to the touch and diaphoretic (sweaty). During the physical exam, the patient reported that she had not been feeling well lately, but was not taking medications, had no recent surgeries, and has not been diagnosed with anything. As time passed she slowly became a little more coherent and her heartrate began to normalize, but she suddenly vomited on the floor. Rapid blood tests reveal hypoglycemia (reduced blood glucose). what is wrong with the patient? a. she forgot to eat b. she walked to the concert and was badly out of shape c. she had a tumor causing over-secretion of insulin d. she was taking over-the-counter supplements c. she had a tumor causing over-secretion of insulin The body maintains a relatively constant internal environment by using ______________ feedback mechanisms, which attempt to return the stimulus back to baseline. negative
b. linings c. covers d. all of the above d. all of the above which of the following statements about epithelium is correct? a. epithelium is highly vascularized b. epithelial cells are polarized c. epithelium possess cell to cell junctions d. epithelium an generate mechanical force from consuming ATP b. epithelial cells are polarized c. epithelium possess cell to cell junctions the simple columnar epithelium that forms absorptive cells of the digestive tract has which characteristic? a. dense microvilli b. rich vascular supply c. stratified
d. cilia a. dense microvilli Pseudostratified columnar epithelium, ciliated variety, ______________. a. lines most of the respiratory tract b. aids in digestion c. possess no goblet cells d. is not an epithelial classification a. lines most of the respiratory tract An inability to absorb digested nutrients and secrete mucous might indicate a disorder in which epithelial tissue? a. simple squamous b. transitional c. simple columnar d. stratified squamous c. simple columnar
