Pnb 22 - Study guides, Class notes & Summaries

A cell is taken out of the 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 flux of water molecules into and out of the cell d. All of the above are true - c. There is flux of water mo...

PNB 2274 Exam 3 Chen Questions And Answers 2024/2025 Solutions Which ascending tract of the spinal cord carries the sensations for fine touch and vibration to the brain? medial and lateral pathways anterolateral pathway posterior column pathway corticospinal pathway ANS posterior column pathway The primary somatosensory cortex is part of the Frontal lobe Temporal lobe Insula Parietal lobe Occipital lobe ANS parietal lobe

PNB 2250 Exam 3 Questions And Answers With Verified Study Tests Examples of respiratory structures of terrestrial animals ANS bulk flow with tracheal system and spiracles (insects), cutaneous (frog) Examples of respiratory structures of aquatic animals ANS bulk flow (sponges, cnidarians), gills, water vascular system, arborescent respiratory trees (sea cucumber), cutaneous (leech) Do all aquatic animals necessarily exchange gasses in water? ANS No, some aquatic animals could exchange g...

PNB 2250 EXAM 3 Questions And Answers With 2024/2025 Updates The presence of poly-unsaturated fatty acids in the cell membrane is decreased in larger animals with lower mass-specific metabolic rates(E3) A. true B. false C. this is dependent on animal shape D. This is only true for swimming animals E. this is only true for flying animals ANS A. true A size selective (but not solute selective) nephron filtration barrier ...(E3) A. is very uncommon in vertebrates B. is not found in ...

PNB 2274 Exam 1 Complete Questions And Answers With Verified Updates Anatomy and Physiology ANS study of structure and function The Anatomic Position ANS standing upright, feet parallel and on the floor, head level and looking forward, arms at side of body, palms facing forward Relative Orientation ANS allows us to describe the relative position of one body structure in relation to another Inferior/Superior ANS low/high Rostral/Caudal ANS towards head/towards tail

PNB 2250 Exam 3 Complete Questions And Answers With Latest Quiz Of the following, which is NOT a strategy by which endotherms generate internal heat: ANS Panting The minimal metabolic activity required to maintain bodily functions in a mammal is known as the ANS basal metabolic rate. Which of the following thermoregulatory mechanisms can be used to restrict blood flow to the skin, and thus decreases heat loss by keeping the warmed blood closer to the core of the body? ANS vasoconstrict...

PNB 2250 Complete Questions And Answers With Verified Solutions How are plant cells held together? ANS Plasmodesma Plasmodesma ANS Flow of nutrients between cells How are animal cells held together? ANS Tight junctions Tight junctions ANS Unique connections for animal cells 2 absolute requirements of animals: ANS 1. Control Systems 2. Distribution Systems

PNB 2274 Exam 3 Chen Verified Questions And Answers 2024/2025 What protects the brain? (3 things) ANS 1. The bones of the cranium 2. The cranial meninges 3. Cerebrospinal Fluid (CSF) What are the cranial meninges? (List superficial to deep) ANS 1. Dura mater 2. Arachnoid 3. Pia mater Dura Mater ANS - "Hard mother" - 2 fibrous layers - Space between layers contains tissue fluids, blood vessels and lymphatic system! Arachnoid ANS - Arachnoid membrane: Epithelial layer

______ 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 `When solutes move from a region of high concentration to low concentration, it is said to be "moving ______________ the concentration gradient." - down a cell is taken out of he body and placed into a test solution. the con...

PNB 2250 Exam Verified Study Questions And Answers A fish in freshwater....(E3) A. rapidly loses water through the gills B. loses solutes through the gills C. must be an Osmo conformer D. actively pumps solutes out of its body through the gills E. must produce a very concentrated urine ANS D The presence of poly-unsaturated fatty acids in the cell membrane is decreased in larger animals with lower mass-specific metabolic rates(E3) A. true B. false C. this is dependent on animal ...