A plane that divides an animal into dorsal and ventral portions is the ________ plane.
Smaller endothermic animals have ________ surface area for their mass compared with larger endothermic animals.
- to deposit bone material into the bone matrix
- to facilitate osteoclast persistence without using excess energy
- to provide access to calcium in the tissue
- to facilitate compact bone structure
Plasma is the ________.
- fibers in the blood
- matrix of the blood
- cell that phagocytizes bacteria
- cell that functions in response to antigens
- to facilitate response to local conditions of tissues
- to facilitate movement of bone
- to speed up or slow down the autonomic nervous system
- to facilitate movement of internal organs
- efficiently pass electrical impulses between cardiac cells
- facilitate immune response to foreign antigens
- cushion body organs from damage
- keeps blood vessels in place
The part of a neuron that contains the nucleus is the ________.
- cell body
- regulates the chemical environment
- sends input
- receives input
- improves signal transfer efficiency
Animals maintain an overall steady state of internal conditions by ________.
- basal metabolic rate
- standard metabolic rate
To what does the term equilibrium refer in the context of organismal homeostasis?
- Control mechanisms that amplify a response
- Control mechanisms that increase or decrease a stimulus
- The target point in homeostasis
- Body functions are maintained within a given range
What type of feedback loop pushes an organism’s physiology further away from it normal setpoints?
- positive-feedback loop
- negative-feedback loop
- set point
When faced with a sudden drop in environmental temperature, an endothermic animal will ________.
- experience a substantial drop in its body temperature
- find a warm rock on which to bask
- increase muscle activity to generate heat
- increase fur or fat to increase insulation
Homeostasis is primarily controlled by ________ feedback loops.
- lowering of blood glucose after a meal
- blood clotting after an injury
- lactation during nursing
- uterine contractions during labor
Which of the following is a strategy that may be employed by an ectotherm to immediately increase body temperature?
- consume more food to increase fat as insulation
- increase amount of vasodilation
- increase amount of muscle contraction
- sit on a warm rock