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WorksheetsExam 4 Review
Total questions: 32
Worksheet time: 24mins
Recruitment is dictated by the size principle. Which fibers would be recruited for the most powerful contractions; which for light contractions?
Small fibers; large fibers
Medium fibers; small fibers
Large fibers; small fibers
Small fibers; medium fibers
In an isotonic contraction, muscle _____, whereas in isometric contraction the muscle ____
Does not shorten; does not shorten
Does not shorten; shortens
Shortens; shortens
Shortens; does not shorten
A sprinter is likely to depend on _____ respiration to generate ATP
Aerobic
Anaerobic
A motor unit is made of
Nerves
Bones
Muscle fibers
Glands
Why are calcium ions necessary for skeletal muscle contraction?
Calcium increases the action potential transmitted along the sarcolemma
Calcium releases the inhibition on Z disks
Calcium triggers the binding of myosin to actin and starts the chain reaction after a nerve impulse
Calcium causes the ATP binding to actin
A person is doing bicep curls. When they lift the weight up toward their body in the process of a curl, what kind of muscle contraction is occurring?
Concentric contraction
Eccentric contraction
Muscles become stiff after death due to a lack of ATP in a condition called
Muscle fatigue
Oxygen debt
Muscle cramp
Rigor mortis
What is the central nervous system made of?
Brain and cranial nerves
Spinal cord and spinal nerves
Spinal nerves and cranial nerves
Brain and spinal cord
There are 3 types of neurons: sensory, motor, and interneurons
True
False
Part of a neuron that receives information from other neurons
Axon
Myelin sheath
Dendrites
Synapse
What is the purpose of the myelin sheath on the axon?
To improve conductivity
To maintain temperature
To protect the axon
To release neurotransmitters
Clusters of cell bodies in CNS are:
Ganglia
Nuclei
Which type of potential does not decay with distance?
Generator potential
Graded potential
Action potential
These neuron processes transmit information from the sensory organs to the central nervous system
Efferent
Afferent
What part of the brain controls balance?
Cerebrum
Cerebellum
Brainstem
Diencephalon
White matter is myelinated
False
True
The "boss" and "heart" of the limbic system
Thalamus
Epithalamus
Interthalamic Adhesion
Hypothalamus
Which of the following brain systems is heavily involved in mediating emotional responses?
Reticular activating system
Limbic system
Reticular formation
None of these
Ascending tracts transmit _____ impulses while descending tracts conduct _____ impulses
Motor, sensory
Cranial, spinal
Sensory, motor
Spinal, cranial
The _____ of the brain is the location of our conscious mind
Brodmann area
Cerebral cortex
Brain stem
Thermoreceptors:
Respond to touch, pressure, vibration, & stretch
Respond to chemicals
Respond to chemicals
Sensitive to changes in temperature
Classifying a sensory receptor as a "proprioceptor" is classifying it based on
Stimulus type
Location
Receptor structure
Nociceptors
Respond to light energy
Respond to chemicals in solution
Respond to painful stimuli
Respond to temperature changes
Exteroceptors
External stimuli
Chemical changes
Special senses
Internal stimuli
Adaptation is a change in sensitivity to a constant stimulus
False
True
Tonic receptors exhibit ____ adaptation
Little
Fast
No
Sensation
Awareness of a stimulus
Interpretation of the meaning of the stimulus
Receptor type does not determine effect of neurotransmitter
True
False
Fight or flight response
Sympathetic nervous system
Short-term stress response
Parasympathetic nervous system
Digestive and urinary system are active
Phenylephrine
Used for hypertension, B-blockers
A1 agonist, used as a nasal decongestant
Blocks receptors, dry response
Used for asthmatic patients, B2 agonists
Regulation of heat rate at low normal levels is achieved by
Sympathetic division
Somatic division
Parasympathetic division
Fibers that release acetylcholine are called ____ fibers, whereas those that release norepinephrine are called ____ fibers
Somatic, autonomic
Adrenergic, cholinergic
Sensory, somatic
Cholinergic, adrenergic
