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AniPhy Lec 1-3
Physiology, Cell Signaling and Endocrine Regulation, and Neurons
| Question | Answer |
|---|---|
| This approach, known as __________, assumes that we can learn about a system by studying the function of its parts. | REDUCTIONISM |
| The approach of using an animal model with features that are favorable for scientific study: For every biological problem there is an organism on which it can be most conveniently studied. | August Krogh principle |
| All cells and many organelles within cells rely on this potential difference, or ________ , to drive processes that are needed for survival such as the movement of essential molecules across membranes | MEMBRANE POTENTIAL |
| When morphology or physiology change in direct proportion to body mass, the scaling relationship it is said to be ______ . | ISOMETRIC (same meaure) |
| When body shape or physiology changes disproportionately as body size increases, the relationship is said to be? | ALLOMETRIC (diff. measure) |
| The term describes the situation in which a shared underlying trait evolves in the same way independently in different lineages. | PARALLEL EVOLUTION |
| of unrelated taxa toward similar phenotypes can occur because particular shapes or functions are favored in a specific environment. The wings of birds and bats and the eyes of cephalopods and vertebrates provide clear examples of _____? | CONVERGENT EVOLUTION |
| It allow internal conditions to change when faced with variation in external conditions. For example, the body temperature of a fish will be low in cold water and high in warm water. | CONFORMERS |
| It maintain relatively constant internal conditions regardless of the conditions in the external environment. Your body temperature is likely to be approximately 37°C whether you are in a warm room or standing outside on a very cold day. | REGULATORS |
| Animals most often maintain homeostasis using a? . A change in the internal or external environment provides a stimulus. The stimulus then causes a response | REFLEX CONTROL PATHWAY |
| Animals fine-tune physiological responses by using? : independent regulators that exert opposite effects on a step or pathway | ANTAGONISTIC CONTROLS |
| the response sends a signal back to the stimulus, reducing the intensity of the stimulus. when you eat, the incoming food causes the stomach to swell. It triggers a reaction, acting through your brain, to reduce your appetite | NEGATIVE FEEDBACK LOOP |
| The word refers to the process of change in response to a controlled environmental variable (usually in a laboratory setting), | ACCLIMATION |
| refers to the process of change in response to natural environmental variation | ACCLIMAZATION |
| maximize changes in the regulated variable. For example, the muscles in the stomach are normally regulated However, when a toxin is detected, is triggered to induce forceful contractions that induce vomiting | POSITIVE FEEDBACK LOOP |
| the ability of an organism to alter its phenotype in response to environmental conditions. The term encompasses a wide range of changes in phenotype, some reversible and some irreversible. | PHENOTYPIC PLASTICITY |
| When a particular phenotype exists in two or more discrete forms, the change is referred to as ? | POLYPHENISM |
| When the phenotypes are part of a continuum, the change in phenotype is referred to as ? | REACTION NORM |
| Some acquired traits can even be passed on to subsequent generations via a mechanism called? | EPIGENETIC INHERITANCE |
| is the ability to do work | ENERGY |
| is energy that is released from an object and transmitted to another object by waves or particles. The sun is the most obvious source | RADIANT ENERGY |
| is a combination of potential and kinetic energy that can be used to move objects from place to place | MECHANICAL ENERGY |
| is a combination of potential and kinetic energy that results from the movement of charged particles down a charge gradient | ELECTRICAL ENERGY |
| y is a form of kinetic energy that is reflected in the movement of particles, and serves to increase temperature. | THERMAL ENERGY |
| y is a form of potential energy that is held within the bonds of chemical structures. It is important in all metabolic reactions, including transport processes such as ion pumping. | CHEMICAL ENERGY |
| Transmembrane gradients are often discussed as? | ELECTROCHEMICAL GRADIENTS |
| are those in which the free energy is greater in P than S, and the forward direction does not occur spontaneously. In either scenario, the unfavored direction can occur, but the favored direction occurs at a much higher frequency | ENDERGONIC REACTION |
| are strong bonds that are formed when two atoms share electrons. | COVALENT BONDS |
| The weak interaction between the two dipoles is the | van der Waals force |
| At the interface between air and water, the attraction between water molecules creates a force called | SURFACE TENSION |
| if the cell were placed in a solution containing only urea, the movement of urea into the cell, combined with the high internal salt concentration, would draw water into the cell, causing it to swell or even burst; this is a | HYPOTONIC SOLUTION |
| An enzymatic reaction begins with the substrate binding at a specific location called the | ACTIVE SITE |
| Adjacent cells can communicate via direct contact between extracellular matrix and membrane proteins, in a process termed juxtacrine communication, or through channels called _____ that span the membranes of two adjacent cells | GAP JUNCTIONS |
| cause a response within the target cell | SIGNAL TRANSLUCATION PATHWAYS |
| Chemical messengers can travel from a signaling cell to nearby target cells by diffusion in a process called | PARACRINE |
| These messengers can even affect the signaling cell, in a process called? | AUTOCRINE |
| For long-distance cell-to-cell communication, animals use the ________ and the ______? | ENDCRINE SYSTEM and NERVOUS SYSTEM |
| Types of Cell Signaling (4) | - Direct Signaling, Autocrine and Paracrine Signaling, Endocrine Signaling, and Neural Signaling |
| These endocrine messengers are called ? | HORMONES |
| electrical signal can be directly transferred to an adjacent cell via gap junctions, but in many neurons, the electrical signal results in the release of a chemical messenger called ? hat diffuses to the target cell over a very short distance. | NUEROTRANSMITTER |
| There are also some neurons that release their neurotransmitters into the circulation. In this case the signaling molecule is called a ? | NEUROHORMONE |
| When this inter-individual communication occurs between members of the same species, the chemical messengers are termed ? | PHEROMONES |