BIO252 PRACTICE EXAM
QUESTIONS GUIDE WITH
CORRECT ANSWERS
How does stretching muscles activate muscle spindle?
There is an increased rate of action potentials sent to the spinal cord
Increased rate = stronger stimulus = generation of action potential in the
motor neuron
The muscle contracts, opposing the stretch of the muscle
stretching stimulates spindle -> activate sensory neuron -> information
processing of motor neuron -> activation of motor neuron -> contraction of
muscle
What is the muscle spindle?
- Composed of <10 non-contractile muscle fibers
- Innervated by sensory neurons that fire AP at a constant rate
What are barorecptors?
The baroreceptors are stretch receptor residing in the walls of large arteries.
They signal the medulla upon increase in blood pressure
The medulla will respond by lowering blood pressure
Prosencephalon
,forebrain
Mesencephalon
midbrain
Rhombencephalon
hindbrain
prosencephalon divides in to...
telencephalon and diencephalon
rhombencephalon divides in to....
metencephalon and myelencephalon
three parts of brian stem
midbrain, pons, medula oblongata
parts of the diencephalon
hypothalamus, thalamus, epithalamus, mammillary bodies
, which part of the brain becomes the cerebrum?
telencephalon
What is homeostasis?
how varied components of living things adjust to maintain a constant internal
living environment. There is a balanced dynamic state! Diseases result from
homeostatic imbalances (diabetes)
What are the levels of organization?
chemical - cellular - tissue - organ - organ system - organismal
What is the nervous system made of?
The Central nervous system (brain and spinal cord) and the peripheral
nervous system (cranial nerves and spinal nerves).
What is the big picture of the nervous system? What does this mean?
Input - Processing - Output. Explain.
Most of our wiring is _____.
insulated.
Neuron
QUESTIONS GUIDE WITH
CORRECT ANSWERS
How does stretching muscles activate muscle spindle?
There is an increased rate of action potentials sent to the spinal cord
Increased rate = stronger stimulus = generation of action potential in the
motor neuron
The muscle contracts, opposing the stretch of the muscle
stretching stimulates spindle -> activate sensory neuron -> information
processing of motor neuron -> activation of motor neuron -> contraction of
muscle
What is the muscle spindle?
- Composed of <10 non-contractile muscle fibers
- Innervated by sensory neurons that fire AP at a constant rate
What are barorecptors?
The baroreceptors are stretch receptor residing in the walls of large arteries.
They signal the medulla upon increase in blood pressure
The medulla will respond by lowering blood pressure
Prosencephalon
,forebrain
Mesencephalon
midbrain
Rhombencephalon
hindbrain
prosencephalon divides in to...
telencephalon and diencephalon
rhombencephalon divides in to....
metencephalon and myelencephalon
three parts of brian stem
midbrain, pons, medula oblongata
parts of the diencephalon
hypothalamus, thalamus, epithalamus, mammillary bodies
, which part of the brain becomes the cerebrum?
telencephalon
What is homeostasis?
how varied components of living things adjust to maintain a constant internal
living environment. There is a balanced dynamic state! Diseases result from
homeostatic imbalances (diabetes)
What are the levels of organization?
chemical - cellular - tissue - organ - organ system - organismal
What is the nervous system made of?
The Central nervous system (brain and spinal cord) and the peripheral
nervous system (cranial nerves and spinal nerves).
What is the big picture of the nervous system? What does this mean?
Input - Processing - Output. Explain.
Most of our wiring is _____.
insulated.
Neuron
