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Bio 1104 Exam 3 Complete Questions And Answers With Verified Solutions
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Bio 1104 Exam 3 Complete Questions And Answers With Verified Solutions
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Bio 1104 Exam 3 Complete Questions And AnswersWith Verified Solutions
Homeostasis ANS Maintaining internal constancy under changing conditions
Regulators ANS Maintain internal state within limits
Conformers ANS Adjust their internal state to match conditions
Set point ANS Target value for a physiological value (e.g. temperature, blood sugar, metabolic activity)
Sensors ANS Detect the current value of the variable
Control centers ANS Compare a variable to a set point and initiate responses
Two types of regulation ANS Negative feedback
Positive feedback
Negative feedback ANS Most common feedback response; returns system to set point
Positive feedback ANS Drives system away from set point by intensifying a process
Thermoregulation ANS A closer look at homeostasis and managing body temperature
Endotherms ANS Generate heat to maintain constant body temperature
Ectotherms ANS Conforms to environmental temperature
Thermal energy moves down a _______ _______ from _____ objects to ______ objects ANS Heat gradient,
warmer, cooler
, Physical ANS Insulation with fat, hair, or feathers; increase or reduce surface area
Behavioral ANS Sunning or shading; activity during specific times of day
Physiology ANS Sweating, shivering, changes in blood flow to skin
Circulatory system ANS System of vessels that aids in bulk transportation of nutrients, dissolved gases (O2 &
CO2), waste and hormones
Diffusion is ____ over short distances but ______ to moves materials to/from the center of larger organisms.
ANS Short, insufficient
Arteries ANS Carry blood away from heart
Veins ANS Carry blood toward the heart
Capillaries ANS Connect arteries and veins; narrow and thin-walled vessels; gas and nutrient waste exchange
occurs in capillary beds
Precapillary sphincters ANS Contract or relax to change flow through capillary beds
Smooth muscle in vessel walls can contract or relax to affect blood flow by changing diameter of vessles ANS
Large ----> normal flow
Small ----> restricted flow
Two units in vertebrae circulation ANS Pulmonary
Systemic
Pulmonary ANS Blood movement to/from lungs or gills
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