Homeostasis
Respiration equation
(With heat as a byproduct)
The name for a number of processes involving communication and resulting effects that maintain the body at homeostasis
Negative Feedback Loop
How does shivering increase body temperature?
Shivering increases respiration. Heat is a byproduct of respiration so it increases heat production
What are the two main divisions of Nervous System
Central & Peripheral
How do hormones travel around the body?
In the blood
Two things the body can do to (physiologically) raise temperature
Vasoconstriction, Goosebumps (piloerection), shivering
The name for a number of processes involving communication and resulting effects that moves the body away from a set point
Positive Feeback Loop
Vasoconstriction occurs when
Body temperature is too cold. It restricts blood flow to the extremities, reducing heat loss and keeping heat at vital organs.
What are the 2 ways signals travel through the nervous system?
Electrically and Chemically
What are the parts of the body that release hormones?
Glands
Hormone that lowers blood glucose levels
Insulin
Chemoreceptor, thermoreceptor and mechanoreceptors are examples of
Sensory nerves
Classification for an organism whose body temperature is managed independently of its environment
Endotherm
What type of response occurs when you touch a hotplate?
Reflex Action
Name 3 glands
Hormone that raises blood glucose levels (releases stored sugar around liver)
Glucagon
Negative feedback loop fill the blank:
Stimulus -> ______________ -> Processing Centre (CNS)
Sensory receptor
How does vasodilation impact thermoregulation?
Vasodilation is the dilation of blood vessels at the surface of the skin. Blood then moves closer to the surface and can more easily transfer heat out of the body (cooling the body)
Describe the pathway of a reflex action
Stimulus (Sensory neuron)--> Spinal cord --> Effector (motor neuron)
Briefly explain how hormones work and cause changes around the body.
They are released from glands, travel through the bloodstream and attach to the specific receptors at the target cells.
Name two body systems that interact in order to bring oxygen into the body and allow carbon dioxide to be removed.
Circulatory system and Respiratory system
Negative feedback loop fill the blanks
Processing centre (CNS) -> Effector -> ____________
Homeostasis restored/Setpoint restored/movement of negative condition towards setpoint
What is the role of the thyroid in thermoregulation?
The thyroid produces thyroxine. Thyroxine increases metabolism. Metabolism is the rate of respiration. Respiration increases heat production
Distinguish 3 differences between the Endocrine and the Nervous system
Speed (N is faster), transport (hormones move in blood), Time (hormones can keep acting for a longer time), chemical versus electric
What is the role of hypothalamus in the endocrine system and what gland does it often stimulate?