Biol 252 Study guides, Class notes & Summaries

Using the example of membrane polarization, the concentration gradient of potassium is ___________ and the electrical gradient for cation movement is ______________. - ANSWER out of the cell. . . . . .. into the cell. In general, negative feedback loops best correlate with - ANSWER mechanisms to maintain homeostasis The simplest level of organization that is considered to be "living" is the: - ANSWER cell _____________ may be important for body functions, but is also associated with d...

chondrocytes - ANSWER cartilage cell tension - ANSWER force needed to stretch or change something compression - ANSWER to press or squeeze together torsion - ANSWER the twisting of a bodily organ

Liver - ANSWER produces bile for fat emulsion pancreas - ANSWER produces digestive enzymes. Accessory organ of the digestive system that is both an endocrine and exocrine gland components of bile - ANSWER minerals, bile pigments, bile acids (salts), phospholipids, cholesterol hepatic sinusoids - ANSWER blood filled channels between the layers of hepatocytes in the liver chymotrypsin and trypsin - ANSWER pancreatic enzymes that digest proteins hepatic lobules - ANSWER microscopic s...

CNS - ANSWER consists of the brain and spinal cord; processes information and determines if and how the body should respond by issuing commands to muscle and gland cells PNS - ANSWER a subdivision of the nervous system that is composed of all nerves and ganglia; divided into sensory and motor divisions Sensory (afferent) - ANSWER specialized neurons that detect stimulus (light, heat, pressure, and chemicals) and transmit information about them to the CNS motor (efferent) - ANSWER neuron...

Section Exam #5 Ecology, 252 Exam 4, Exam 1 252, Biology 252 - Midterm #3, BIOL 252 - Exam 2 Exam Verified Answers 2024

Where would you expect to find dense regular elastic connective tissue? - ANSWER aorta What do you expect brown fat to produce low levels of given the cell's role in thermogeneration? - ANSWER ATP Where would you expect to find Fibrocartilage? - ANSWER Between the femur and tibia of the knee joint Which best describes why doctors recommend that women, who are prone to estrogen-dependent osteoperosis, take calcium suppliments? - ANSWER Women cannot make Ca2+, which is essential to maint...

Matrix, Ground Substance - ANSWER Extracellular Fluid Histiology - ANSWER The study of tissue and how they are arranged Squamous - ANSWER thin, scaly cells Fusiform - ANSWER Elongated, with a thick middle and thin ends, like in smooth muscle lumen - ANSWER internal space of an organ Epithelial tissue - ANSWER Consists of a flat sheet of closely spaced cells 8 types of epithelial tissue - ANSWER Simple: simple squamous, simple columnar, simple cuboidal, pseudo-stratified columna...

Summarize the differences between the somatic and autonomic nervous systems with regards to these factors: neurotransmitters, number of fibers, myelination, effectors, effect - ANSWER Somatic- Acetylcholine is the neurotransmitter, one nerve fiber, myelinated all the way, skeletal muscle is the effector, the effect is always excitatory Autonomic- Acetylcholine and Norepinephrine are the neurotransmitters, two nerve fibers, preganglionic nerve fibers are myelinated, glands, smooth muscle, and...

Schwann cells - ANSWER produce myelin in PNS, one of the 6 types of neuroglia. Uniporter - ANSWER A carrier protein that transports a single molecule across the plasma membrane. antiporter - ANSWER A carrier protein that transports two molecules acrss the plasma membrane in opposite directions. symporter - ANSWER transporter that carries two different ions or small molecules, both in the same direction primary active transport - ANSWER Active transport that relies directly on the hyd...

Ecology is the study of - ANSWER interactions between organisms and their environment Environmental science - ANSWER Interdisciplinary field that incorporates natural sciences and social sciences. Ex: ecology and relation with politics, economics, ethics Scale - ANSWER The spatial or temporal dimension at which ecological observations are collected