Biol 252 exam 1 Study guides, Class notes & Summaries

Central Nervous System - ANSWER "general" of the body; integration of sensory input and origin of motor responses • brain • spinal cord Peripheral Nervous System - ANSWER body; sensory input and motor output • nerves • sensory receptors • motor neurons sensory receptors - ANSWER Afferent neurons → Admit signals differentiated based on location • somatic • visceral somatic sensory receptors - ANSWER receptors and neurons that are located in the skin, skeletal ...

Explain the functional divisions of the nervous system. Include the subdivisions of each. - ANSWER Central Nervous System and Peripheral Nervous System - CNS includes the brain and spinal cord - PNS includes autonomic and somatic nervous systems Are thermoreceptors part of the PNS or CNS? - ANSWER PNS A child eats a whole bottle of salt (NaCl) tablets. What effect does this have on the resting membrane potential? - ANSWER no effect - think of the analogy of adding a handful of sand to t...

What do you think would happen if the elastic fibers in tissues were distensible but not elastic? - ANSWER This would cause the tissues to be unable to resume their original shape and size once the stretching forces were removed. Predict what would happen if the tight junctions in blood vessels were not functional. - ANSWER Tight junctions make the spaces between the cells relatively impermeable to water and many solutes. Nonfunctional tight junctions in blood vessels would allow much of the ...

Function follows _____________ - ANSWER Form Afferent = - ANSWER Sensory Efferent = - ANSWER Motor Two divisions of the sensory nervous system: - ANSWER Somatic and visceral What does the somatic nervous system control? - ANSWER skin, skeletal muscles, joints What does the visceral nervous system control? - ANSWER smooth muscle, cardiac muscle, glands, organs two divisions of motor division - ANSWER somatic nervous system and autonomic nervous system T/F: As the stomach expa...

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...

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...

astrocytes - ANSWER support and brace neurons and blood vessels, regulate ECF environment of CNS, formation of blood brain barrier, and repair damaged brain tissue oligodendrocytes - ANSWER insulator of CNS neurons- myelinates neurons microglia - ANSWER "immune cells" of CNS; clean up environment acting as wandering phagocytes ependymal cells - ANSWER ciliated epithelial cells that circulate cerebrospinal fluid schwann cells - ANSWER myelinate neurons of the PNS and repair damaged ...

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

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...

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...