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Biology 256 FINAL EXAM with solved questions
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Biology 256 FINAL EXAM
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Biology 256 FINAL EXAMThe sheet of connective tissue beneath skin around a muscle, providing a pathway for
nerves and blood vessels is called the - answersfascia
The muscle cell plasma membrane is called - answerssarcolemma
A sarcomere is - answersthe area between two Z disks
A motor unit is - answersa motor neuron and myofibers it stimulates
After nervous stimulation of the muscle cell has ceases, the acetycholine - answersis
destroyed by actyl choline esterase
In muscle action potential, the wave of positive mV charge travels through the _____ to
the sarcoplasm from the sarcolemma. - answersT-tubles
The number of muscle fibers in a contracted state in an otherwise relaxed muscle is
known as its - answersmuscle tone
A motor neuron and the myofibers it innervates is known as a(n) - answersmotor unit
Which takes the longest time in a contracting skeletal myofiber? - answers
calcium ions bind to ___ in skeletal muscle cells - answerstroponin
The warm-up period required of athletes in order to bring their muscles to peak
performance is called - answersTreppe
what surrounds the individual muscle cell - answersendomysium
Oxygen is stored in myofibers on/in? - answersmyoglobin
The blood vessel type removing Co2 and waste from the tissues is the - answersvein
,The molecule binding calcium in smooth muscle is - answerscalmodulin
Which blood protein(s) serve as antibodies that tag foreign substances for elimination
from the body - answersgamma globulins
what might trigger erythropoiesis? - answersincreased tissue demand for oxygen
Glucose delivered to a recovering myofiber is used to - answersreestablish glycogen
stores
Smooth muscle is significantly different from striated muscle in several ways. Which of
the following is true? - answers
if a doctor orders a blood test requiring the use of serum, - answersno anticoagulant
should be added
Formed elements found in the blood that are about 7-8 Um in diameter with no nuclei
are - answerserythrocytes
The primary organs whose macrophages are responsible for phagocytizing worn-out
red blood cells are the - answersspleen and liver
A lack of intrinsic factor, leading to a deficiency of vitamin B12 and large pale red blood
cells called macrocytes, is characteristic of: - answerspernicious anemia
what is a precursor of a monocyte - answersmonoblast
The normal neutrophil percentage of while blood cells is? - answersabove 50%
A person with chronic leukemia is ___ likely to suffer a bacterial infection in/on their
body. - answersmore
The father is Rh- and the mother is Rh+. They have had three children without adverse
problems due to the Rh factor. The mother is pregnant again. In terms of the Rh factor,
the risk to this fetus - answersnever was a problem
Initiation of a cardiac action potential in contracting cardiac muscle cells begins with -
answersopening voltage gated fast sodium channels
If cardiac muscle is deprived of its normal blood supply, damage would primarily result
from - answerslack o oxygen in myofibers
During a normal cardiac cycle, the atria contract when they are directly stimulated by
the - answerssinoatrial node
where is the pacemaker of the heart located? - answersright atrium
, input from the sympathetic nervous system casues the heart rate to? - answersincrease
- answersEKG with ventricular fibrullation
Normal EKG - answers
The first heard sound is caused by.. - answersclosure of the mitral and tricuspid valves
the tricuspid valve is closed - answerswhen the right ventricle is in systole
The Stroke volume for a normal resting heart is ___ ml/ beat. - answers70
On average, normal resting cardiac output for an adult is about - answers5 liters/min
what factors influence heart rate? - answersage, body temp, sex
The effect of endurance-type athletic training may be to lower the resting heart rate.
This phenomenon - answersis caused by hypertrophy of the heart muscle
Control of blood flow through a capillary bed occurs at its - answerspre capillary
sphincter
peripheral resistance - answersincreases as blood viscosity increases
what blood vessel would you find has the highest blood pressure? - answersaorta
Which provides a long-term control for blood pressure? - answersnervous system
aldosterone will - answersincrease your bp
pulse is measured in - answersthe arteries
what is NOT a risk factor for essential hypertension - answerscirculatory shock
blood flow to the skin.... - answersincreases when environmental temp rises
Acute hypotension may be result of... - answerslarge-scale blood loss
If the osmotic pressure in the blood vessels is lower than that in the tissues, tissue ___
will result. - answersedema
Which requires nervous system input for stimulation of muscle contraction? -
answersskeletal muscle
muscle fiber - answers
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