Iowa State University Bio 212 Test 3
Questions Fully Solved.
Plants are different from animals because plant development: - Answer Involves organ
formation in adults
What are cells of the endocrine system that release molecules called? - Answer Hormones
What is a group of organs and cells that produce chemical signals and secretes them into the
bloodstream? - Answer Endocrine system
What are signals that act on the same cell that secretes them? - Answer Autocrine signals
What are signals that diffuse locally and act on nearby cells? - Answer Paracrine signals
What are signals that are hormones carried between cell by blood or other body fluids? -
Answer Endocrine signals
What are signals that diffuse a short distance between neurons? - Answer Neural signals
What are signals that are hormones released from neurons? - Answer Neuroendocrine
signals
What pathway sends hormones directly from endocrine cells to effector cells? - Answer
Endocrine pathway
What pathway releases neuroendocrine signals that act directly on effector cells? - Answer
Neuroendocrine pathway
What pathway stimulates cells in the endocrine system, which responds by producing an
endocrine signal that acts on effector cells? - Answer Neuroendocrine-to-endocrine pathway
The endocrine system and __________________________________ work closely together to
regulate the response to a stimulus. - Answer Nervous system
What are organs that secrete hormones into the bloodstream? - Answer Endocrine glands
, What are the three chemical families of hormones? - Answer Polypeptides, amino acid
derivatives, and steroids
A cell with membrane-bound proteins that selectively bind a specific hormone is called that
hormone's: - Answer Target cell
Most animal hormones are carried to target cells in the: - Answer Blood
Hormones exert what type of cell-to-cell signaling? - Answer Endocrine
What are the three main mechanisms of asexual reproduction? - Answer Budding, fission,
and parthenogenesis
What does estradiol do? - Answer Induces growth of the oocyte
- Can cause negative and positive effects depending on the concentration
What are the four steps of gas exchange? - Answer Ventilation, gas exchange, circulation and
cell respiration
What is partial pressure? - Answer The amount of pressure exerted by the certain gases in
the air
How much of the air is oxygen? - Answer 21%
How does partial pressure change with altitude? - Answer - Percentage of gases remain the
same regardless of the altitude
- Lower atmospheric pressure results in lower partial pressures
How does partial pressure affect oxygen diffusion? - Answer The rate of diffusion into blood
is lower at higher elevations
What are the main respiratory organs? - Answer Lungs, trachea, gills
How does oxygen bound to hemoglobin depend on PO2? - Answer High partial pressure will
favor the bound state; low partial pressure will favor the unbound state
Asexual Reproduction - Answer One involved in reproduction
Questions Fully Solved.
Plants are different from animals because plant development: - Answer Involves organ
formation in adults
What are cells of the endocrine system that release molecules called? - Answer Hormones
What is a group of organs and cells that produce chemical signals and secretes them into the
bloodstream? - Answer Endocrine system
What are signals that act on the same cell that secretes them? - Answer Autocrine signals
What are signals that diffuse locally and act on nearby cells? - Answer Paracrine signals
What are signals that are hormones carried between cell by blood or other body fluids? -
Answer Endocrine signals
What are signals that diffuse a short distance between neurons? - Answer Neural signals
What are signals that are hormones released from neurons? - Answer Neuroendocrine
signals
What pathway sends hormones directly from endocrine cells to effector cells? - Answer
Endocrine pathway
What pathway releases neuroendocrine signals that act directly on effector cells? - Answer
Neuroendocrine pathway
What pathway stimulates cells in the endocrine system, which responds by producing an
endocrine signal that acts on effector cells? - Answer Neuroendocrine-to-endocrine pathway
The endocrine system and __________________________________ work closely together to
regulate the response to a stimulus. - Answer Nervous system
What are organs that secrete hormones into the bloodstream? - Answer Endocrine glands
, What are the three chemical families of hormones? - Answer Polypeptides, amino acid
derivatives, and steroids
A cell with membrane-bound proteins that selectively bind a specific hormone is called that
hormone's: - Answer Target cell
Most animal hormones are carried to target cells in the: - Answer Blood
Hormones exert what type of cell-to-cell signaling? - Answer Endocrine
What are the three main mechanisms of asexual reproduction? - Answer Budding, fission,
and parthenogenesis
What does estradiol do? - Answer Induces growth of the oocyte
- Can cause negative and positive effects depending on the concentration
What are the four steps of gas exchange? - Answer Ventilation, gas exchange, circulation and
cell respiration
What is partial pressure? - Answer The amount of pressure exerted by the certain gases in
the air
How much of the air is oxygen? - Answer 21%
How does partial pressure change with altitude? - Answer - Percentage of gases remain the
same regardless of the altitude
- Lower atmospheric pressure results in lower partial pressures
How does partial pressure affect oxygen diffusion? - Answer The rate of diffusion into blood
is lower at higher elevations
What are the main respiratory organs? - Answer Lungs, trachea, gills
How does oxygen bound to hemoglobin depend on PO2? - Answer High partial pressure will
favor the bound state; low partial pressure will favor the unbound state
Asexual Reproduction - Answer One involved in reproduction
