BI 121 (Lecture) Exam 1 GRCC Questions
with Complete Solutions
Negative Feedback Mechanism The body is MOVED TOWARDS homeostasis
The majority of feedback mechanisms are this - most common in the body
e.g., high serum, salt, and thirst; shivering, and sweating brings the body back
Positive Feedback Mechanism The body is MOVED AWAY from homeostasis - the
response increase change of the stimulus - external factors terminates it
e.g., child birth, clotting, lactation, uterine contractions, increased temp
Integumentary System Protections from environmental hazards; temperature control
ex: skin, hair, sweat glands
Skeletal System Protections of soft tissues; mineral storage
ex: bone, ligaments, tendons
Muscular System Locomotion, support, heat production
,ex: brain, spinal cord, nerves
Cardiovascular System internal transport of cells and dissolved materials
ex: blood vessels, heart, veins
Lymphatic System Defense against infection and disease
ex: lymph nodes, lymphatic vessels, splein
Digestive System processing of food and absorption of nutrients
ex: esophagus, stomach, intestine, liver
Respiratory (Pulmonary) System Transport of air to, and from, sites of gas exchange
between air and blood
ex: lungs, trachea, bronchi
Urinary System elimination of excess water, salts, and waste products
ex: ureters, bladder, kidneys, urethra
, Reproductive System Productions of sex cells and hormones
ex: genetics
Nervous System directing immediate responses to stimuli
ex: brain, spinal cord, nerves
Endocrine System Directing long-term changes in the activities of other organ systems
ex: thyroid gland, thymus, pituitary gland
Four Principle Types of Tissues 1. epithelial
2. connective
3. muscle
4. nervous
epithelial tissue lines or covers structures (organs)
connective tissue fills in spaces, structure support, transport materials
with Complete Solutions
Negative Feedback Mechanism The body is MOVED TOWARDS homeostasis
The majority of feedback mechanisms are this - most common in the body
e.g., high serum, salt, and thirst; shivering, and sweating brings the body back
Positive Feedback Mechanism The body is MOVED AWAY from homeostasis - the
response increase change of the stimulus - external factors terminates it
e.g., child birth, clotting, lactation, uterine contractions, increased temp
Integumentary System Protections from environmental hazards; temperature control
ex: skin, hair, sweat glands
Skeletal System Protections of soft tissues; mineral storage
ex: bone, ligaments, tendons
Muscular System Locomotion, support, heat production
,ex: brain, spinal cord, nerves
Cardiovascular System internal transport of cells and dissolved materials
ex: blood vessels, heart, veins
Lymphatic System Defense against infection and disease
ex: lymph nodes, lymphatic vessels, splein
Digestive System processing of food and absorption of nutrients
ex: esophagus, stomach, intestine, liver
Respiratory (Pulmonary) System Transport of air to, and from, sites of gas exchange
between air and blood
ex: lungs, trachea, bronchi
Urinary System elimination of excess water, salts, and waste products
ex: ureters, bladder, kidneys, urethra
, Reproductive System Productions of sex cells and hormones
ex: genetics
Nervous System directing immediate responses to stimuli
ex: brain, spinal cord, nerves
Endocrine System Directing long-term changes in the activities of other organ systems
ex: thyroid gland, thymus, pituitary gland
Four Principle Types of Tissues 1. epithelial
2. connective
3. muscle
4. nervous
epithelial tissue lines or covers structures (organs)
connective tissue fills in spaces, structure support, transport materials
