Bio 215 Test #2 UPDATED ACTUAL Exam
Questions and CORRECT Answers
4 MECHANISMS OF INTERCELLULAR COMMUNICATIONS - CORRECT
ANSWER - Direct communication
Paracrine communication
Endocrine communication
Synaptic communication
Direct Communication - CORRECT ANSWER - *Exchange of ions and molecules
between adjacent cells across gap junctions
*Occurs between two cells of same type
*Highly specialized and relatively rare
Paracrine Communication - CORRECT ANSWER - Uses chemical signals to transfer
information from cell to cell within single tissue
Most common form of intercellular communication
Endocrine Communication - CORRECT ANSWER - Endocrine cells release chemicals
(hormones) into bloodstream
Alters metabolic activities of many tissues and organs simultaneously
The Endocrine System - CORRECT ANSWER - A. Regulates long-term processes
1. Growth
2. Development
3. Reproduction
B. Uses chemical messengers to relay information and instructions between cells
Synaptic communication - CORRECT ANSWER - 1.Occurs across a synaptic cleft
, 2.Chemical mediator is a neurotransmitter
Target Cells - CORRECT ANSWER - Are specific cells that possess receptors needed to
bind and "read" hormonal messages
Hormones - CORRECT ANSWER - 1. Stimulate synthesis of enzymes or structural
proteins
2. Increase or decrease rate of synthesis
3. Turn existing enzyme or membrane channel "on" or "off"
Hypothalamus Hormones - CORRECT ANSWER - ADH, Oxytocin, and regulatory
hormones
Pituitary Gland Hormone - CORRECT ANSWER - Adenohypohysis: ACTH, TSH, GH,
PRL, FSH, LH, and MSH, neurohypophysis: release of oxytocin and ADH
Pineal Gland Hormone - CORRECT ANSWER - Melantonin
Parathyroid Glands Hormone - CORRECT ANSWER - Parathyroid Hormones
Heart Hormone - CORRECT ANSWER - ANP, BNP
Thyroid Gland Hormone - CORRECT ANSWER - Thyroxine, tridothyronine, and
calcitonine
Thymus Hormone - CORRECT ANSWER - Thymosine
Suprarenal Glands Hormone - CORRECT ANSWER - Epinephrine, norepinephrine,
cortisol, aldosterone, adrogens
Questions and CORRECT Answers
4 MECHANISMS OF INTERCELLULAR COMMUNICATIONS - CORRECT
ANSWER - Direct communication
Paracrine communication
Endocrine communication
Synaptic communication
Direct Communication - CORRECT ANSWER - *Exchange of ions and molecules
between adjacent cells across gap junctions
*Occurs between two cells of same type
*Highly specialized and relatively rare
Paracrine Communication - CORRECT ANSWER - Uses chemical signals to transfer
information from cell to cell within single tissue
Most common form of intercellular communication
Endocrine Communication - CORRECT ANSWER - Endocrine cells release chemicals
(hormones) into bloodstream
Alters metabolic activities of many tissues and organs simultaneously
The Endocrine System - CORRECT ANSWER - A. Regulates long-term processes
1. Growth
2. Development
3. Reproduction
B. Uses chemical messengers to relay information and instructions between cells
Synaptic communication - CORRECT ANSWER - 1.Occurs across a synaptic cleft
, 2.Chemical mediator is a neurotransmitter
Target Cells - CORRECT ANSWER - Are specific cells that possess receptors needed to
bind and "read" hormonal messages
Hormones - CORRECT ANSWER - 1. Stimulate synthesis of enzymes or structural
proteins
2. Increase or decrease rate of synthesis
3. Turn existing enzyme or membrane channel "on" or "off"
Hypothalamus Hormones - CORRECT ANSWER - ADH, Oxytocin, and regulatory
hormones
Pituitary Gland Hormone - CORRECT ANSWER - Adenohypohysis: ACTH, TSH, GH,
PRL, FSH, LH, and MSH, neurohypophysis: release of oxytocin and ADH
Pineal Gland Hormone - CORRECT ANSWER - Melantonin
Parathyroid Glands Hormone - CORRECT ANSWER - Parathyroid Hormones
Heart Hormone - CORRECT ANSWER - ANP, BNP
Thyroid Gland Hormone - CORRECT ANSWER - Thyroxine, tridothyronine, and
calcitonine
Thymus Hormone - CORRECT ANSWER - Thymosine
Suprarenal Glands Hormone - CORRECT ANSWER - Epinephrine, norepinephrine,
cortisol, aldosterone, adrogens
