Biology 251 Exam 1 WSU Questions and Answers 100% Pass
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Course
WSU bio 251
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WSU Bio 251
Biology 251 Exam 1 WSU Questions and
Answers 100% Pass
What are the four levels of organization in the body? - Answer ️️ -Cells, Tissues,
Organs, Organ Systems
What are the three major functions of cells? Cells independently carry out all life
processes. - Answer ️️ -- Perform chemical...
Biology 251 Exam 1 WSU Questions and Answers 100% Pass What are the four levels of organization in the body? - Answer ✔️✔️-Cells, Tissues, Organs, Organ Systems What are the three major f unctions of cells? Cells independently carry out all life processes. - Answer ✔️✔️-- Perform chemical reactions that use oxygen and nutrients to produce energy - Produce CO2, wastes - Synthesize Complex Molecules What are the four common characteristics of cells? - Answer ✔️✔️-- Sensitive to internal environment - Communicate with other cells - Cell growth - Cell division; most cells What is differentiation? - Answer ✔️✔️-The process by which cells become specialized to perform specific functions, resulted from altered gene expression in response to locally produced molecules What is an undifferentiated cell? - Answer ✔️✔️-A Stem Cell --not assigned a specific job yet What are two main categories of undifferentiated cells? - Answer ✔️✔️-1) Embryonic stem cells -pluripotent (can become any type of future fetus) **Totipotent cell (=zygote, first few divisions) --can become any cell including placenta 2) Tissue -specific stem cells -partially specialized, found in many adult tissues What are the four types of tissues in the body? - Answer ✔️✔️-1) Epithelial 2) Muscle 3) Nerve 4) Connective What is the function of Epithelial tissue? - Answer ✔️✔️-Epithelial tissue or the epithelium. They specialize in transport in and out of the body and various organs in the body. Forms barriers by: - Separating body from external environment - Lining hollow organs - Forming glands - *possibly specialized for tra nsport of molecules like in the gut and kidneys What is the function of Muscle tissue? - Answer ✔️✔️-Contraction, generation of force What is the function of Nerve tissue? - Answer ✔️✔️-Initiate, transmit electrical impulses What is the function of Connect ive tissue? - Answer ✔️✔️-Connective tissues: Connect and support various body parts Cells plus extracellular matrix (ECM) kind of like gel Like the cytoplasm of the entire body What are Epithelial Tissue glands? - Answer ✔️✔️-Specialized organs for secret ions there are EXOcrine glands and ENDOcrine glands What is an EXOcrine gland? - Answer ✔️✔️-ducts lead to external environment (ex. Salivary glands) What is an ENDOcrine gland? - Answer ✔️✔️-ductless and secrete hormones into blood (hormones use bloodstre am as a highway to deliver messages) What is the difference between and EXOcrine gland and the ENDOcrine gland? - Answer ✔️✔️-EXOcrine glands=have ducts ENDOcrine glands=NO ducts What are the three types of muscles? - Answer ✔️✔️-- skeletal muscle - smooth muscle - cardiac muscle Where are the muscles found? - Answer ✔️✔️-Attach to the skeleton, found in heart, in other internal organs. Are muscles voluntary or involuntary? - Answer ✔️✔️-Some muscles are under voluntary control like the skeletal mus cle, while others are involuntary. What are the purposes/functions of nerves? - Answer ✔️✔️-Nerve tissue(Neurons): Function in transmitting electrical signals. Additionally, control and regulate muscle contraction, gland secretion, sensory perception, thou ghts, memory, emotions, and much more What are some examples of connective tissues? - Answer ✔️✔️-(Ex. Adipose (fat) --
special connective tissue, blood cells(all blood), cartilage, bone) kind of like jello
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