Homeostasis multiple choice Flashcards
Homeostasis is defined as:
process by which a constant internal environment is maintained despite changes in external environment
examples of negative feedback systems include
Almost all homeostatic control mechanisms are negative feedback mechanisms. These mechanisms change the variable back to its original state or “ideal value”.everything except for oxytocin, blood clotting, and contraction during childbirth
humans regulate their body temperature through a control centre located in
Hypothalamus
which of the following list of organs are responsible for the removal of metabolic wastes?
The lungs, skin , kidney , liver, large intestine
the cerebral cortex is mainly concerned with which of the following
Sensory and Motor and Association Areas
- outer lining of the cerebral hemispheres
within the nervous system there are special structures that help to protect the system from injury. Name the membrane that surround the central nervous system
Meninges
- cerebrospinal fluid
- cerebral cortex
the hormone ___released by the ____ to _____ blood glucose
Insulin released by the pancreas to lower blood glucose
Glucagon released by the pancreases to raise blood glucose
the ____ nervous system is responsible for which of the following ?
- central; brain and spinal cord
- peripheral; sensory and motor
- motor; somatic and autonomic
- somatic; under conscious control - skeletal muscles
- autonomic; not under conscious control
- sympathetic; flight or fight response
- parasympathetic; rest and digest reponse
given the steps shown below , which is the correct sequence for transmission at a chemical synapse?
Action potential depolarizes the synaptic terminal membrane , Ca 2+ ion rush into neuron cytoplasm , synaptic vesicles release neurotransmitter into synaptic cleft , neurotransmitter binds with receptors associated with the postsynaptic membrane , ligand-gated ion channels open
- which of the following is not a tropic hormone released by the anterior pituitary gland?
Human growth hormone hGH, thyroid stimulating hormone tsh, adrenocorticiotopic acth , prolactin , FSH , LH ,
TSH; ACTH; Prolactin; hGH; FSH; and LH
______ term stress often results in higher blood sugar levels. This may result in all but one of the following complications:
- short : heart rate and blood pressure increase; blood flow to the heart and muscles increases; breathing rate increases; blood glucose rises; rate of cellular metabolism increases
Exocytosis is used by the synaptic vesicles to release their contents at which of the following?
- end plate of the presynaptic neuron
