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AP Biology Unit 4 UPDATED Exam Questions and CORRECT Answers $10.49
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AP Biology Unit 4 UPDATED Exam Questions and CORRECT Answers

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  • Course
  • AP- Biology – Enzymes
  • Institution
  • AP- Biology – Enzymes

AP Biology Unit 4 UPDATED Exam Questions and CORRECT Answers Endocrine system - CORRECT ANSWER - Secretes hormones into blood from ductless glands that coordinate slower but longer-acting responses Paracrine - CORRECT ANSWER - Signals act on cells near the secreting cell Local regulators - C...

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  • February 12, 2025
  • 10
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • AP- Biology – Enzymes
  • AP- Biology – Enzymes
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AP Biology Unit 4 UPDATED Exam
Questions and CORRECT Answers
Endocrine system - CORRECT ANSWER - Secretes hormones into blood from ductless
glands that coordinate slower but longer-acting responses


Paracrine - CORRECT ANSWER - Signals act on cells near the secreting cell



Local regulators - CORRECT ANSWER - Chemical signals that travel over short distances
due to diffusion


Autocrine - CORRECT ANSWER - Signals act on the secreting cell itself (usually for
apoptosis)


Pheromones - CORRECT ANSWER - Chemical signals that are released from the body and
are used to communicate with other individuals


Signal Transduction - CORRECT ANSWER - The linkage of mechanical, chemical, or
electromagnetic stimulus to a specific cellular response


Hormone - CORRECT ANSWER - A regulatory substance produced in an organism and
transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action.


Neurohormones - CORRECT ANSWER - A hormone produced by nerve cells and secreted
into the circulation.


Epinephrine - CORRECT ANSWER - A hormone secreted by the adrenal glands, especially in
conditions of stress.

, Negative Feedback - CORRECT ANSWER - The diminution or counteraction of an effect by
its own influence on the process giving rise to it, as when a high level of a particular hormone in
the blood may inhibit further secretion of that hormone, or where the result of a certain action
may inhibit further performance of that action.


Growth Hormone - CORRECT ANSWER - hormone secreted by anterior pituitary gland that
usually stimulates growth of bones


second messengers - CORRECT ANSWER - Small, non-protein water soluble molecules or
ions that send messages throughout the cells by diffusion.


Plant growth regulator - CORRECT ANSWER - Organic compounds other than nutrients (like
hormones that affect plant growth.


plant hormone - CORRECT ANSWER - abscisic acid, auxin, cytokinins, ethylene,
gibberellins act as chemical messengers


tropism - CORRECT ANSWER - A growth response that results in the curvature of whole
plant organs toward or away from stimuli owing to differential rates of cell elongation.


phototropism - CORRECT ANSWER - Growth of a plant shoot toward or away from light.



circadian rhythms - CORRECT ANSWER - The 24-hour biological cycles found in humans
and many other species.


action potential - CORRECT ANSWER - A neural impulse; a brief electrical charge that
travels down an axon.


anaphase - CORRECT ANSWER - fourth stage of mitosis, in which the chromatids of each
chromosome have separated and the daughter chromosomes are moving to the poles of the cell

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