Homeostasis
What is the definition of homeostasis?
The ability of an organism to maintain consistent internal environment in response to changing internal or external conditions
Which of the following is a classic example of positive feedback?
A. Regulation of body temperature
B. Blood glucose regulation
C. Labor contractions during childbirth
D. Maintenance of blood pressure when standing
C. Labor contractions during childbirth
Match the macromolecule to its primary function:
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic Acids
_____ Store and transfer genetic information
_____ Provide structural support (keratin, collagen)
_____ Major component of cell membranes
_____ Primary quick energy source
D – Nucleic Acids
C – Proteins
B – Lipids
A – Carbohydrates
Diffusion is defined as movement of molecules:
A. From low concentration to high concentration
B. Against a concentration gradient
C. From high concentration to low concentration
D. Using ATP
C. From high concentration to low concentration
Which of the following are the four primary tissue types?
A. Epithelial, connective, muscle, nervous
B. Bone, blood, cartilage, muscle
C. Nervous, endocrine, skeletal, digestive
D. Smooth, cardiac, skeletal, epithelial
A. Epithelial, connective, muscle, nervous
Provide an example of a homeostatic system
1. when body temperature is too high, the integumentary system will begin to sweat to reduce temperature.
2. The muscular system will begin contracting to produce heat (shivering)
In a positive feedback loop:
A. The effector reverses the original stimulus
B. The response reduces deviation from the set point
C. The stimulus is amplified
D. Homeostasis is immediately restored
C. The stimulus is amplified
A molecule made of repeating subunits is called a:
A. Monomer
B. Polymer
C. Hydrocarbon
D. Enzyme
B. Polymer
Diffusion continues until:
A. ATP is depleted
B. Equilibrium is reached
C. A hormone stops it
D. Temperature decreases
B. Equilibrium is reached
Connective tissue originates from:
A. Ectoderm
B. Mesenchyme
C. Endoderm
D. Epithelium
B. Mesenchyme
What is the purpose of a receptor in a homeostatic system?
It will detect change in a variable
(ie. change in temperature sensed by skin)
Positive feedback differs from negative feedback because positive feedback:
A. Maintains a variable at a set point
B. Produces a response opposite of the stimulus
C. Reinforces the stimulus and moves the variable further in the same direction
D. Always involves hormones
C. Reinforces the stimulus and moves the variable further in the same direction
ATP is classified as a:
A. Carbohydrate
B. Lipid
C. Protein
D. Nucleotide
D. Nucelotide
Osmosis is the movement of:
A. Solutes
B. Water
C. Proteins
D. Ions only
B. Water
Which tissue type is avascular in its mature form?
A. Bone
B. Blood
C. Cartilage
D. Muscle
C. Cartilage
Define control center
Interprets input from receptor and initiates changes through the effector
Fill in the Blank please: Positive feedback occurs much less frequently than __________________ feedback in the body.
negative
The bond that links amino acids together is called a:
A. Phosphodiester bond
B. Hydrogen bond
C. Peptide bond
D. Ionic bond
C. Peptide bond
Active transport moves substances:
A. Down their concentration gradient
B. Without energy
C. Against their concentration gradient
D. Through simple diffusion
C. Against the concentration gradient
Fill in the blank please: Exocrine glands release secretions through a __________________.
Duct
What is an effector?
Is the structure that brings about changes to alter the stimulus
During labor, the hormone __________________ stimulates stronger uterine contractions, which causes more hormone release.
oxytocin
Where is glycogen stored primarily?
A. Brain and heart
B. Liver and skeletal muscle
C. Adipose tissue only
D. Kidneys
B. Liver and skeletal muscle
Vesicular transport includes:
A. Diffusion
B. Osmosis
C. Exocytosis and endocytosis
D. Ion channels
Fill in the Blank
C. Exocytosis and endocytosis
Match the following terms with their correct definitions:
Match the tissue type with its function:
A. Epithelial
B. Connective
C. Muscle
D. Nervous
_____ Conducts electrical impulses
_____ Supports and binds structures
_____ Covers surfaces and forms glands
_____ Produces movement
D – Nervous
B – Connective
A – Epithelial
C – Muscle